Xiaorui Zheng's Paper Accepted to Nanoscale
May 8, 2020
Xiaorui Zheng’s paper, Free-standing graphene oxide mid-infrared polarizers, has been accepted by Nanoscale. Bing Xu, Shuo Li, Han Lin, Ling Qiu, and Dan Li are listed as co-authors. Baohua Jia is the corresponding authors [LINK].
In this work, the authors developed a versatile transmittance-based Kramers-Kronig method and obtained the optical properties of graphene oxide in the MIR region, unveiling its application potentials as a novel MIR compatible material. As an example, they demonstrated free-standing graphene oxide MIR polarizers with large extinction ratio (~ 20 dB) and controllable working wavelength up to 25 μm, by using the low-cost and flexible direct laser writing technique. The transmittance-based KK method offers a versatile approach to obtain the optical properties of novel atomic-scale low-dimensional materials in the less developed MIR region and opens up opportunities in high performing functional MIR devices.
Yafeng Chen's Paper Accepted to Physical Review Research
April 6, 2020
Yafeng Chen’s paper, Inverse design of higher-order photonic topological insulators, has been accepted by Physical Review Research. Fei Meng, Yuri Kivshar and Baohua Jia are listed as co-authors. Xiaodong Huang is the corresponding authors [LINK].
In this work, the authors design several structures supporting both topological edge and corner states at the desired frequencies. Through programming newly created SPTIs, they suggest a strategy for routing topological edge and corner states. Their findings pave the way for the development of integrated photonic devices with topological protection and innovative functionalities.
Keng-Te's Paper been reported on IEEE SPECTRUM
March 25, 2020
Keng-Te Lin’s recent research work has been reported on IEEE SPECTRUM, as titled “Graphene Solar Thermal Film Could Be a New Way to Harvest Renewable Energy“.
“The result is an efficient solar heating metamaterial that can heat up rapidly to 83 degrees C (181 degrees F) in an open environment with minimal heat loss. Proposed applications for the film include thermal energy harvesting and storage, thermoelectricity generation, and seawater desalination.” — IEEE SPECTRUM
Keng-Te's Paper Accepted to Nature Communications
March 16, 2020
Keng-Te Lin’s paper, Structured graphene metamaterial selective absorbers for high efficiency and omnidirectional solar thermal energy conversion, has been accepted by Nature Communications. Han Lin and Tieshan Yang are listed as co-authors. Baohua is the corresponding authors [LINK].
In this work, the authors propose and demonstrate three-dimensional structured graphene metamaterial (SGM) that takes advantages of wavelength selectivity from metallic trench-like structures and broadband dispersionless nature and excellent thermal conductivity from the ultrathin graphene metamaterial film. Impressive solar-to-thermal conversion efficiency of 90.1% and solar-to-vapor efficiency of 96.2% have been achieved. These superior properties of the SGM absorber suggest it has a great potential for practical applications of solar thermal energy harvesting and manipulation.
This work has also been reported by Swinburne Research Updates [LINK].
Group Retreat at Lakes Entrance
March 3, 2020
LNI Group had a group retreat at Lakes Entrance on 29 Feb-1 Mar. Catching crabs, enjoying the scenic views, having hotpot…. We certainly had a great time together!
Guiyuan Cao has been approved for the award of the degree of Doctor of Philosophy
Feb 13, 2020
Guiyuan Cao has been awarded the degree of Doctor of Philosophy (Science) in February 2020. Guiyuan started her PhD study in 2016 under the supervision of Professor Baohua Jia.
Feb 5, 2020
International Conference on Nanomaterials and Atomaterials Science and Applications (ICNASA) was hosted by Swinburne University of Technology. We, Centre for Translational Atomaterials (CTAM) are proud to have organised ICNASA 2020, which brought the participation of more than 80 academic professionals and delegates. ICNASA 2020 was held from 31 Janto 3 Feb at Hawthorn Campus of Swinburne University of Technology in Melbourne, Australia.
This year’s delegation consisted of 13 students, representing three institutions within Australia. We were also fortunate to be joined by 65 keynote speakers and six invited speakers who are experts in the field of 2D materials, biomedical materials etc.
The focus of the programme for ICNASA 2020 was scientific and professional development, which aimed to develop the students’ skills for engaging with the world as mature scientists. We were very honoured to be joined by 4 plenary speakers, whom students had interesting and thoughtful conversations with. We also ran student talks and poster presentations in which students introduced their latest research. In addition, lab tours were also conducted to provide the opportunity for researchers to interact and discuss the future collaborations.
The epic highlight of the conference was the global opening of CTAM Open Labs. With the engagement of 80 attendees, we were thrilled of the launch of the CTAM Open Labs which delivers innovative models for effective and sustainable collaborations between universities and industry. Several social events such as reception night, industry exhibition, conference dinner were also organised during the two-day conference to facilitate networking and build a welcoming and friendly atmosphere among attendees.
Tieshan's Application for ANN Bursary registration to ICONN 2020 Succeeded
Nov 22, 2019
Tieshan was granted a bursary by ANN to attend ICONN 2020, to be held from Sunday 9 to Thursday 13 February to be held at the Brisbane Convention & Exhibition Centre. This bursary covers the conference registration fee, which includes one ticket to attend the conference dinner on Wednesday 12 February 2020.
Weijian's Paper Accepted to Chemistry of Materials
Nov 19, 2019
Weijian Chen’s paper, Long-Distance Ionic Diffusion in Cesium Lead Mixed Halide Perovskite Induced by Focused Illumination, has been accepted by Chemistry of Materials. Wei Li, Zhixing Gan and Yi-Bing Chen are listed as co-authors. Baohua and Xiaoming are the corresponding authors[LINK].
In this work, we visualize the diffusion of light-activated mobile ions in mixed halide perovskite polycrystals by monitoring phase segregation in both the illuminated “bright” spot and the nonilluminated “dark” region. Upon light activation, a long distance of mobile ion diffusion and substitution of halide ions, up to 12 μm, is observed without any stimulation of wide-field illumination or biased electric field. Specifically designed fluorescence lifetime imaging microscopy experiments show mobile ions, once photoactivated, can diffuse for a long distance in the dark and induce phase segregation in a mixed halide perovskite. This investigation provides an understanding of mobile ions and the photophysics of hybrid halide perovskite, aids the design of perovskite solar cells, and provides a new pathway for the development of ionic applications of perovskites for compacted energy harvesting and storage.
Kit's Paper Accepted to Composites Part B: Engineering
Oct 04, 2019
Kit-Ying Chan’s paper, Boosting the electrical and mechanical properties of structural dielectric capacitor composites via gold nanoparticle doping, has been accepted by Composites Part B: Engineering. Dan Yang, Baris Demir, Adrian P.Mouritz, Han Lin, Baohua Jia and Kin-Tak Lau are listed as co-authors. Kit-Ying is the corresponding author [LINK].
In this work, gold nanoparticles (AuNPs) with high electrical conductivity were added in different weight fractions (up to 1 wt%) into the epoxy matrix of CFRP electrodes used in graphene oxide-bearing SDCs (GO/SDCs). The electrical conductivity of AuNP-modified CFRP electrodes was 15–250% higher than the unmodified CFRP electrode, depending on the concentration of nanoparticles. As a result, both specific capacitance and energy storage density of AuNPs-modified GO/SDCs were higher (up to ~170% and ~50%, respectively) than the unmodified GO/SDC. Furthermore, AuNP-modified GO/SDCs had higher tensile and interlaminar shear properties. This research provides new insights into improving both the electrical and mechanical properties of SDCs using AuNPs.
Huihui's Paper Accepted to Journal of Power Sources
Oct 04, 2019
Huihui Zhang’s paper, Ultrahigh heating rate induced micro-explosive production of graphene for energy storage, has been accepted by Journal of Power Sources. Dan Yang and Chong Lei are listed as co-authors. Baohua and Han are the corresponding authors [LINK].
In this work, by introducing ultrahigh heating rate into thermally driven reduction process and ensuring a high local temperature via thermal management, the authors propose the production of such materials through micro-explosive reduction process initiated by short heating pulses, for example using a camera flash. This simple and scalable method enables rapid gas generation and release process and creates sponge-like electrode materials with high ion-transportation quality. Electrochemical supercapacitors based on the fabricated electrodes demonstrate high energy density of around 60 Wh kg−1.
CTAM co-organized Graphene Research Forum
Sep 19, 2019
The Graphene Research Forum was successfully held in Swinburne by MFRI and CTAM at September 19, 2019.
Graphene related research is one of the key research focuses of Manufacturing Future Research Institute (MFRI) within its theme on Next Generation Materials. Within Swinburne, diverse graphene research projects ranging from low-cost material synthesis and characterisation, thin film coating, functional composite engineering, advanced graphene device fabrication to the complete graphene supply chain investigation have been conducted. The aim of this workshop is to provide a networking opportunity for all the graphene researchers within the University to exchange ideas, establish and reinforce multidisciplinary collaborations.
Researchers across Swinburne, including Prof. Bronwyn Fox, Prof. Baohua Jia, A/Prof Chenghua Sun, A/Prof Aimin Yu, Dr. Dennis Antiohos, Dr. Nishar Harmeed, Dr. Hongjian Du, Ms. Pui Yan Hung, Dr. Lachlan Hyde and Prof. Francois Malherbe gave talks on their research on graphene. We are also very honored to have invited Prof. Tierui Zhang from CAS to give an invited talk. Students posters were also displayed on the forum.
Yunyi's Paper Accepted to Laser & Photonics Reviews
Aug 31, 2019
Yunyi Yang’s paper, Graphene Oxide Waveguide and Micro‐Ring Resonator Polarizers, has been accepted by Laser & Photonics Reviews. Jiayang Wu is listed as co-first author, Yang Qu, Xingyuan Xu, Yao Liang, Sai Tak Chu, Brent E Little and Roberto Morandotti are listed as co-authors. Baohua and David Moss are the corresponding authors [LINK].
In this work, detailed measurements are performed to characterize the performance of the devices versus GO film thickness and coating length as a function of polarization, wavelength and power. A high polarization dependent loss of ≈53.8 dB is achieved for the waveguide coated with 2‐mm‐long patterned GO films. It is found that intrinsic film material loss anisotropy dominates the performance for less than 20 layers whereas polarization‐dependent mode overlap dominates for thicker layers. For the MRRs, the GO coating length is reduced to 50 µm, yielding a ≈8.3 dB polarization extinction ratio between transverse electric (TE) and transverse magnetic (TM) resonances. These results offer interesting physical insights and trends of the layered GO films and demonstrate the effectiveness of introducing GO films into photonic‐integrated devices to realize high‐performance polarization selective components.
Can Graphene Change the world?-- Dr. Han Lin at TEDxMelbourne
Aug 30, 2019
Dr. Han Lin was invited to TEDxMelbourne and being interviewed to introduce the wonder material, graphene. Han is using graphene to develop game changing new energy storage devices that can hold large amounts of energy, charge super fast and be used for unlimited life cycles as well as being environmentally friendly. During this interview, Han explained why is graphene being hailed as the wonder material? And what other uses could it have beyond energy storage? This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.youtube.com/watch?v=JtmQi-eJQfg.
Well done, Han!
Zhixing's Paper Accepted to Advanced Optical Materials
Aug 21, 2019
Zhixing Gan’s paper, Transient Energy Reservoir in 2D Perovskites, has been accepted by Advanced Optical Materials. Chunhua Zhou, Weijian Chen, Fei Zheng, Shuang Yang, Jeffery Davis, Patrick Charles Tapping, Tak W Kee and Hua Zhang are listed as co-authors. Xiaoming and Baohua are the corresponding authors [LINK].
In this work, it is revealed that there is a special transient energy reservoir outcompeting nonradiative loss in 2D Ruddlesden−Popper type perovskites. Upon optical excitation, the bright excitons rapidly relax into the low‐lying energy reservoir before nonradiative recombination occurs. Interestingly, the energy in the reservoir is not lost. The carriers in this energy reservoir can spontaneously transfer back to the bright states and can still effectively contribute to the photovoltaic and photonic properties of the perovskites. This investigation provides a novel insight into the mechanism for the lauded defect tolerance of 2D perovskites by highly efficient energy storage via a transient reservoir.
Jul 30, 2019
Mr. Shirong Lin has been awarded the degree of Doctor of Philosophy (Science) in July 2019. Shirong was a joint PhD student between Beijing Institute of Technology and Swinburne University and Technology under the supervision of Professor Baohua Jia. The title of his thesis is ” Nonlinear optical responses of hybrid graphine oxide films”.
Congratulations Dr. Lin!
Zhixing's Paper Accepted to Nanoscale
Jul 17, 2019
Zhixing Gan’s paper, The Optical Properties of Cs4PbBr6-CsPbBr3 Perovskite Composites, has been accepted by Nanoscale. Fei Zheng, Wenxin Mao, Chunhua Zhou, Weijian Chen, Udo Bach, Patrick Charles Tapping, Tak W Kee and Jeffery Davis are listed as co-authors. Xiaoming and Baohua are the corresponding authors [LINK].
In this work, green emission of the CsPbBr3-Cs4PbBr6 perovskite composites is studied by the temperature dependent photoluminescence (PL). The PL spectra at different temperatures simultaneously contain two sub-peaks (520 nm and 550 nm), which are ascribed to emissions of band-edge and the defect trapped exciton of CsPbBr3. This finding will help to understand the controversial photoluminescence currently observed in different 0D Cs4PbBr6 perovskites.
ICNASA 2019 & Grand Opening of CTAM finished successfully
Jul 5, 2019
International Conference on Nanomaterials and Atomaterials Science and Applications (ICNASA) was hosted by Swinburne University of Technology. We, Centre for Translational Atomaterials (CTAM) are proud to have organised the 1st ICNASA, which brought the participation of more than 80 academic professionals and delegates. ICNASA 2019 was held from 3 July to 5 July at Hawthorn Campus of Swinburne University of Technology in Melbourne, Australia.
This year’s delegation consisted of 34 students, representing 20 institutions from 4 different countries. We were also fortunate to be joined by 45 invited speakers who are experts in the field of 2D materials, biomedical materials etc.
The focus of the programme for ICNASA 2019 was scientific and professional development, which aimed to develop the students’ skills for engaging with the world as mature scientists. We were very honoured to be joined by 4 plenary speakers, whom students had interesting and thoughtful conversations with. We also ran student talks and poster presentations in which students introduced their latest research. In addition, lab tours were also conducted to provide the opportunity for researchers to interact and discuss the future collaborations.
The epic highlight of the conference was the grand opening of CTAM. With the engagement of 110 attendees, we were thrilled of the launch of the new centre which delivers innovative solutions in fundamental science and industrial applications. Several social events such as reception night, industry exhibition, conference dinner were also organized during the two-day conference to facilitate networking and build a welcoming and friendly atmosphere among attendees.
Chunhua's Paper Accepted to ACS Applied Materials & Interfaces
Jul 10, 2019
Chunhua’s paper, Spatially Modulating the Fluorescence Color of Mixed-Halide Perovskite Nanoplatelets through Direct Femtosecond Laser Writing, has been accepted by ACS Applied Materials & Interfaces. Guiyuan Cao, Zhixing Gan, Qingdong Ou, Weijian Chen and Qiaoliang Bao are listed as co-authors. Xiaoming and Baohua are the corresponding authors [LINK].
In this work, the authors demonstrate that arbitrary patterns can be drawn on a wide range of perovskite NPs, implying the potential applications in microencryption, sensors, multicolor displays, lasers, and light-emitting devices.
Inner Cover Page Accepted to Advanced Energy Materials
Jun 26, 2019
Inner Front Cover for Fei and Weijian’s paper (Triggering the Passivation Effect of Potassium Doping in Mixed-Cation Mixed-Halide Perovskite by Light Illumination) has been accepted by Advanced Energy Materials and now online [LINK]
LNI group members won FSET Research Awards
Jun 6, 2019
This year’s field for the FSET Research and HDR Awards was incredibly competitive with over 50 applications for the awards. Several of them were won by LNI group members.
FSET HDR Awards
- FSET Postgraduate Student of the Year – Commendations: Kit-Ying Chan
- HDR Outstanding Article – Winner: Tieshan Yang
- HDR Outstanding Thesis Award – Commendations: Dr. Yunyi Yang
FSET Research Awards
- FSET ECR Award – Commendations: Dr Blanca del Rosal Rabes
- FSET MCR Award – Winner: Dr Xiaoming Wen
May 04, 2019
Fei Zheng and Weijian Chen’s paper, Triggering the Passivation Effect of Potassium Doping in Mixed-Cation Mixed-Halide Perovskite by Light Illumination, has been accepted by Advanced Energy Materials. Tongle, Kenneth, Fuzhi, Yibing, Patrick and Tak are listed as co-authors. Xiaoming and Baohua are the corresponding authors [LINK].
In this work, it is demonstrated that illumination is essential to trigger the passivation effect of K+ by forming KBr-like compounds, leading to the elimination of interface trapping defects and suppression of mobile ion migration, thus resulting in improved power conversion efficiency and negligible current-voltage hysteresis of solar cells. This work provides novel insight into the hysteresis suppression upon K+ doping and highlights the significance of light illumination when using this protocol.
Congratulations Fei and Weijian!
New Centre for Translational Atomaterials
May 04, 2019
A new state-of-the-art research centre, Centre for Translational Atomaterials (CTAM), is established. CTAM will lead the conception, design, characterisation, theoretical modelling and development of new transformative technologies based on atomic materials, such as graphene and graphene family materials and other two-dimensional materials.
Centre Director Professor Baohua Jia and Deputy Director Associate Professor Chenghua Sun, together with the Program Leaders Professor Xiaodong Huang, Professor Alan Lau, Professor Paul Stoddart, Professor Feng Wang and Deputy Program Leader Dr Rosalie Hocking, aim to develop the new centre as a world-leader in innovative and emergent materials, with strong ties to fundamental science and industrial applications. The centre will directly contribute to the development of new generation atomic materials and technologies, which have the potential to create new industries and businesses in Australia, and worldwide.
As the core component part, LNI group is dedicated to contribute to the future successes of our new research Centre for Translational Atomaterials.
http://lniconference.com.auLNI group will host ICNASA at Swinburne University of Technology on 4-5 July 2019 [LINK]. This conference focuses on the most recent advances in the fields of micro/nano/atomic-materials and optoelectronics, especially the new ideas and concepts in modelling, synthesis, fabrication and testing of new materials, structures, devices and systems, and their applications. It provides a global forum to exchange knowledge on nano and atomic materials, engineering, manufacturing and industrialisation.
Apr 02, 2019
Zhixing Gan’s paper, The Dominant Energy Transport Pathway in Halide Perovskites: Photon Recycling or Carrier Diffusion?, has been accepted by Advanced Energy Materials [Link]. Weijian, Chunhua, Shuang, Guiyuan, Kenneth and Ghiggino are listed as co-authors. Xiaoming and Baohua are the corresponding authors.
In this work, a comparison of 3D bulk CH3NH3PbBr3 single crystal to 2D perovskite by depth-resolved two-photon PL spectra reveals the contribution of carrier diffusion on energy transport at a distance beyond diffusion length is constantly negligible, though the carrier diffusion indeed exists in the 3D crystal. The investigation resolves the fundamental confusion and debate surrounding the issue and provides significant insights into carrier kinetics in perovskites, which is important for future developments in solar cells and other optoelectronic devices.
Mar 19, 2019
Han Lin’s paper, A 90-nm-thick graphene metamaterial for strong and extremely broadband absorption of unpolarized light, has been accepted by Nature Photonics [Link]. Björn C. P. Sturmberg, Keng-Te, Yunyi, Xiaorui and Teck are listed as co-authors. C. Martijn de Sterke and Baohua are the corresponding authors.
In this work, the authors experimentally dem-onstrate a 12.5 cm2, 90-nm-thick graphene metamaterial with approximately 85% absorptivity of unpolarized, visible and near-infrared light covering almost the entire solar spectrum (300-2,500 nm). The metamaterial consists of alternating graphene and dielectric layers; a grating couples the light into waveguide modes to achieve broadband absorption over incident angles up to 60. The very broad spectral and angular responses of the absorber are ideal for solar thermal applications, as they illustrate by showing heating to 160 C in natural sunlight. These devices open a novel approach to applications of strongly absorbing large-area photonic devices based on two-dimensional materials.
Mar 15, 2019
Tieshan Yang’s paper, Fundamental Transport Mechanisms and Advancements of Graphene Oxide Membranes for Molecular Separation, has been accepted by Chemistry of Materials [Link]. Han and Kian Ping are listed as co-authors. Baohua is the corresponding author.
In this review, the mechanisms, i.e., in-plane pores (defects), interlayer spacing, and functional group assisted molecular separation, of selective molecular transport through GO membranes are summarized. In addition, preparation and interlayer spacing tuning strategies of GO membranes are provided. This timely review aims to present the latest advancements in both the theoretical and experimental demonstration of GO membranes for molecular separation. Moreover, current challenges and emerging perspectives of GO membranes for separation are also discussed.
Mar 14, 2019
Yunyi Yang’s paper, Graphene-Based Multilayered Metamaterials with Phototunable Architecture for on-Chip Photonic Devices, has been accepted by ACS Photonics [Link]. Han, Baoyue, Yinan, Xiaorui, Aimin and Minghui are listed as co-authors. Baohua is the corresponding author.
In this work, the experimental demonstration of the phototunable graphene-based multilayered metamaterials on diverse substrates by a transfer-free, solution-phase deposition method is presented. This graphene-based metamaterial provides a new experimental platform for broad applications in on-chip integrated photonic, biomedical, and microfluidic devices.
Jan 18, 2019
Mr. Yunyi Yang has been awarded the degree of Doctor of Philosophy (Science) in January 2019. Yunyi started his PhD study in September 2014 under the supervision of Professor Baohua Jia. The title of his thesis is ” 3D multilayer graphene oxide thin film platform for functional devices”.
Congratulations Dr. Yang!
Jan 12, 2019
Zhixing Gan’s paper, External stokes shift of perovskite nanocrystals enlarged by photon recycling, has been accepted by Applied Physics Letters [Link]. Weijian, Lin Yuan, Guiyuan, Chunhua, Shujuan are listed as co-authors. Xiaoming and Baohua are the corresponding authors.
In this work, the authors found that photon recycling significantly contributes to the external Stokes shift of perovskite NCs, in particular for the ultra-small sizes with strong QCE. This finding will add to the growing fundamental physical understanding of perovskites, which is of great interest due to their applications in photovoltaics and other fields.
Professor Baohua Jia and Dr. Keng-Te Lin were awarded $340,000 for a 2018 ARC Discovery Project to develop an environmentally-friendly solution for efficient thermal energy manipulation;
Professor Saulius Juodkazis, Dr Xiaoming Wen, and Professor David Moss were awarded $450,000 for a 2018 ARC Discovery project to develop a new standard in solar energy conversion efficiency.
Tieshan Yang’s paper, Anisotropic Third-Order Nonlinearity in Pristine and Lithium Hydride Intercalated Black Phosphorus, has been accepted by ACS Photonics [Link]. Ibrahim, Han, Yang, Sherman, Scott, Kian are listed as co-authors. Baohua is the corresponding author.
In this work, the authors measured the third-order nonlinear optical responses in exfoliated black phosphorus (BP) and in lithium hydride intercalated BP (LiH-BP) flakes using polarization-resolved microscopic femtosecond Z-scan techniques. Highly anisotropic polarization-dependent Kerr nonlinearities of both BP and LiH-BP flakes were observed. The strong nonlinear and anisotropic optical responses of BP and LiH-BP indicate the great potential of these materials in nonlinear photonics device applications.
Zhixing Gan’s paper, Engineering the Carrier Dynamics of g-C3N4 by Rolling up the Planar Sheets to Nanotubes via Ultrasonic Cavitation, has been accepted by Nanoscale[Link]. Baohua is the corresponding author. In this work, a simple and clean ultrasonic method is developed to curve the 2D g-C3N4 sheets to 1D nanotubes. And the carrier dynamics of the g-C3N4 sheets nanotubes are studied by time-resolved PL spectra.
Yunyi Yang’s paper, Enhanced four-wave mixing in waveguides integrated with graphene oxide, has been published online by APL Photonics [Link] as featured article and highlighted on the journal’s home page. Jiayang, Xingyuan, Yao, Sai, Brent, Roberto are listed as co-authors. Baohua and David are the corresponding authors.
In this study, the authors demonstrate enhanced four-wave mixing (FWM) in doped silica waveguides integrated with graphene oxide (GO) layers. They showed theoretically that for different waveguide geometries an enhancement in FWM efficiency of ~20 dB can be obtained in the doped silica waveguides and more than 30 dB in silicon nanowires and slot waveguides. This demonstrates the effectiveness of introducing GO films into integrated photonic devices in order to enhance the performance of nonlinear optical processes.
Chunhua Zhou’s paper, Illumination Induced Halide Segregation in Gradient Bandgap Mixed-Halide Perovskite Nanoplatelets, has been accepted by Advanced Optical Materials[Link]. Qingdong, Weijian, Zhixing, James, Qiaoliang are listed as co-authors. Xiaoming and Baohua are the corresponding authors.
In this study, the authors develop a method to fabricate gradient bandgap perovskites with designed energy funneling, and also provides significant insight into the halide segregation in such special perovskites, which greatly benefits their future optoelectronic applications.
LNI group member, Dr Xuewen Wang has won the $5,000 ANN Overseas Travel Fellowship to support his visit to Radboud University, Nijmegen, the Netherlands for a period of three months. ANN supports the nanotechnology community by making funding support available to postgraduate students and early career researchers (within 5 years of award of PhD degree) for travel and accommodation expenses associated with ANFF Short Term Visits, Short term visits and Long Term Visits, within Australia including collaborative visits to Industry. ANN also offers postgraduate students and early career researchers (within 5 years of award of PhD degree) Overseas Travel Fellowships to support for travel and accommodation expenses associated with research visits of up to 3 months duration at collaborating research institutions and industry overseas.
LNI group members, Tieshan Yang has won the prestigious 2018 IONS KOALA Travel Grant up to the value of 200 AUD. The IONS Conference on Optics, Atoms, and Laser Applications (KOALA) is an annual conference held in Australia and New Zealand sponsored by The Optical Society (OSA). The 11th instalment of IONS KOALA is being co-hosted by the OSA student chapters at Macquarie University and the University of Sydney. With the support of many organisations, KOALA brings together research students in physics from all around the world.
LNI group members, Yachu Zhang has won the prestigious 2018 Swinburne Research Student Photography & Image Competition with his “Broken bridge structure of reduced graphene oxide“. All entries were judged on aesthetics, creativity and relevance to research by a professional panel.
Shuo Li’s paper, On-Demand Design of Tunable Complete Photonic Band Gaps based on Bloch Mode Analysis, has been accepted by Scientific Reports [Link]. Han, Fei, David are listed as co-authors. Xiaodong and Baohua are the corresponding authors.
In this study, the authors present an analytical design method for achieving high-order two-dimensional photonic crystals with tunable photonic band gaps on-demand. Based on the Bloch mode analysis for periodic structures, the authors are able to determine the geometric structure of the unit cell that will realize a nearly optimal photonic band gap for one polarization between the appointed adjacent bands. More importantly, this method generates a complete bandgap for all polarizations, with frequencies tuned by the number of photonic bands below the gap. The lowest dielectric contrast needed to generate a photonic band gap, as well as conditions for generating complete bandgaps, are investigated. The work first highlights the systematic approach to complete photonic band gaps design based on Bloch mode analysis. The physical principles behind our work are then generalized to other photonic lattices.
Guiyuan Cao’s paper, An accurate design of graphene oxide ultrathin flat lens based on Rayleigh-Sommerfeld theory, has been accepted by Opto-Electronic Advances [Link]. Xiaosong, Han are listed as co-authors. Baohua is the corresponding authors.
In this study, the authors develop a lens design method based on the Rayleigh-Sommerfeld (RS) diffraction theory that is able to unambiguously determine the radii of each ring without the optimization process for the first time. More importantly, the RS design method is able to accurately design GO lenses with arbitrary NA and focal length. Their design is experimentally confirmed by fabricating high NA GO lenses with both short and long focal lengths. Compared with the conventional Fresnel design methods, the differences in ring positions and the resulted focal length are up to 13.9% and 9.1%, respectively. The method can be further applied to design high performance flat lenses of arbitrary materials given the NA and focal length requirements, including metasurfaces or other two-dimensional materials.
LNI group members, Dr Xiaoming Wen and Dr Han Lin have won the prestigious FSET Research Travel Grants for round 1 2018. Awards are made in the range $1000 – $2000 to support their travel and networking opportunities.
Congratulations Xiaoming and Han!
Fei Zheng’s paper, Slow Response of Carrier Dynamics in Perovskite Interface upon Illumination, has been accepted by ACS Applied Materials & Interfaces [Link]. Weijian is listed as a co-author. Xiaoming and Baohua are the corresponding authors.
In this study, the authors investigated the slow variation of photogenerated carrier dynamics in (FAPbI3)0.85(MAPbBr3)0.15 perovskite interface under continuous illumination. Different response behaviours of carrier dynamics in perovskite interfaces with and without hole transporting layer, Spiro-OMeTAD (Spiro), were systematically studied by time-dependent steady-state and time-resolved photoluminescence (PL). It was demonstrated that light-induced defect curing process is dominantly responsible for the carrier dynamic evolution for perovskite interface without Spiro, while both defect curing process and mobile ions migration should be account for the dynamic response of perovskite interface contact with Spiro. This research work can faithfully highlight the strong correlation of slow photo-response behaviours of perovskite interface with both light-induced defect curing and ion migration process, providing novel implications into the physical mechanism for the slow variation of PSCs performance under working condition.
Xiaoming’s paper, The Role of Surface Recombination in Halide Perovskite Nanoplatelets, has been accepted by ACS Applied Materials & Interfaces [Link]. Weijian, Tieshan, Chunhua, Han are listed as co-authors. Xiaoming, Baohua and David are the corresponding authors.
The paper, using time-resolved micro-spectroscopy along with modelling, investigates charge carrier recombination dynamics in halide perovskite CH3NH3PbI3 nanoplatelets with thicknesses from ~ 20 – 200nm, ranging from much less to comparable to the carrier diffusion length. It shows that surface recombination plays a stronger role in thin perovskite nanoplatelets, significantly decreasing photoluminescence (PL) efficiency, PL decay lifetime, and photo-stability. This work provides a comprehensive understanding of the role of surface recombination and charge carrier dynamics in thin perovskite platelets and reveals valuable insights useful for applications in photovoltaics and photonics.
Minister Birmingham has also announced the new ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), led by Distinguished Professor Chris Berndt, to be awarded $6,654,410 over five years. The centre brings together research leaders across all career stages, including Professor Peter Kingshott, Professor Baohua Jia, Dr Rosalie Hocking, Professor Guoxing Lu, Professor Saulius Juodkazis, Professor Xiaodong Huang, Associate Professor Scott Wade, Dr Andrew Ang, and Dr James Wang.
The ARC Training Centre in Surface Engineering for Advanced Materials aims to provide pathways for job creation and a high quality workforce in manufacturing. Surface engineering for advanced materials is a core need in all manufacturing sectors and controls the efficiency, productivity and sustainability of Australian industry. ($4.89M).
Partners: Brenco Aerospace Pty. Ltd.; Kremford (Vic) Pty Ltd; Laserbond Limited; Romar Engineering Pty Ltd; Ruag Australia Pty Ltd; Titomic Pty Ltd; Sutton Tools Proprietary Limited; United Surface Technologies Pty. Ltd.; SCG Chemicals Co. Ltd; Ningbo Flo Optical Technology Development Co.,Ltd; Australian Nuclear Science And Technology Organisation; Commonwealth Scientific And Industrial Research Organisation; DMTC Limited.
Blanca’s paper, Beyond Phototherapy: Recent Advances in Multifunctional Fluorescent Nanoparticles for Light-Triggered Tumor Theranostics, has been accepted by Advanced Functional Materials [Link]. Baohua is listed as a co-author. This article reviews the different approaches for in vivo tumor theranostics, highlighting their advantages and limitations, and provides a critical analysis of the current state of the ï¬eld
“We talk about recent (last 5 years) advances on multifunctional nanoparticles for image-guided tumor therapy. This was a toooooough thing to put together but I am pretty proud of how it looks!!“, said Blanca, the first author.
Shuangyang’s paper, Template-Free Synthesis of High-Yield Fe-Doped Cesium Lead Halide Perovskite Ultralong Microwires with Enhanced Two-Photon Absorption, has been accepted by The Journal of Physical Chemistry Letters [Link]. Tieshan, Zhixing, Weijian, Xiaoming are listed as co-authors. Baohua is the corresponding author.
This article demonstrates the successful synthesis of high-yield Fe-doped cesium lead halide perovskite ultralong microwires, which have a diameter up to 5 microns and lengths up to millimeters, via an anti-solvent vapor-assisted template-free method. Super-high nonlinear absorption and high-quality optical properties have been characterised, indicating its promising applications in spin related optical switching and optical limiting devices.
Fei Zheng, Chunhua and Baohua’s collaborative paper, A biomimetic supramolecular approach for charge transfer between donor and acceptor chromophores with aggregation-induced emission, has been accepted by Chemistry A European Journal [Link].
In this work, an electron-donating chromophore and an electron-accepting chromophore based on TPE have been designed and synthesised, demonstrating a convenient approach to fabricate a supra molecular charge transfer system using an AIE donor and acceptor.
Xuewen’s paper, Recent Advances on Optical Vortex Generation, has been accepted by Nanophotonics. Yao Liang is one of the co-authors and Baohua is the corresponding author.
This article reviews recent progress leading to the generation of optical vortex beams. Different approaches for optical vortex generation by discrete components and laser cavities have been summarised. Recent progress on vortex lasing has also been introduced, including vortex beam generation from the output of bulk lasers by modification of conventional laser cavities with phase elements and from integrated on-chip microlasers. The advanced technology and approaches on design and nanofabrications enable multiple vortex beams generation from a single device via multiplexing, multicasting and vortex array, open up opportunities for applications on parallel data processing, information encoding/ decoding, communication and micromanipulations.
Mr. Yunyi Yang has won the HDR Publication Award. This grant aims to encourage HDR students to prepare research publications without jeopardising the progress towards thesis completion.
Ms. Shuo Li has been awarded the degree of Doctor of Philosophy (Science) in June 2018. Shuo started her PhD study in August 2014 under the supervision of Professor Baohua Jia. The title of her thesis is “Physical Design of Periodic Structures: from Photonic Crystals to Phononic Crystals”.
Shao Ing’s paper, Towards enhanced energy density of graphene-based supercapacitors: Current status, approaches, and future directions, has been accepted by the Journal of Power Sources [Link]. Shao Ing is a Joint PhD student from Sarawak campus. Han is one of the co-authors and Baohua is the corresponding author.
This paper discusses current status of graphene-based supercapacitors in energy storage market. Approaches to high energy density graphene-based supercapacitors have been reviewed, which inspires potential strategies to develop high energy density graphene-based supercapacitors.
Congratulations Shao Ing!
Kit-Ying’s paper, Multifunctional graphene oxide paper embodied structural dielectric capacitor based on carbon fibre reinforced composites, has been accepted by the Journal of Composites Science and Technology [Link]. Han and Baohua are listed as co-authors.
In this study, the multifunctionality of structural dielectric capacitor made by integrating graphene oxide paper into carbon fibre reinforced composite has been investigated. It is revealed that both electrical and mechanical properties of the structural dielectric capacitors were significantly enhanced by interleaving a graphene oxide paper in the middle of composite, indicating the excellent potential of graphene oxide paper in the development of multifunctional materials for energy storage, potentially for high strength required applications, such as electric vehicles and unmanned aerial vehicles.
Dr. Han Lin and Professor Baohua Jia have won FSET Translation Award. It has been a severe competition with more than 80 applications for each award. Only by having those significant talents in LNI group, we are able to secure the prestigious awards!