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Unraveling the synergetic mechanism of physisorption and chemisorption in laser-irradiated monolayer WS_(2)

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Nano Research 2021年第11期14卷 4274-4280页

作者： Yuanzheng Li Jiaxu Yan Jinping Chen Tong Yu Hang Ren Xiuling Liu Weizhen Liu Guochun Yang Chunxiang Xu qiaoliang bao Yichun Liu Haiyang Xu Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education Northeast Normal UniversityChangchun130024China State Key Laboratory of Bioelectronics School of Biological Science and Medical EngineeringSoutheast UniversityNanjing210096China School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun130022China Department of Materials Science and Engineering ARC Centre of Excellence in Future Low-Energy Electronics Technologies(FLEET)Monash UniversityWellington RoadClaytonVIC3800Australia

To further improve the quantum efficiency of atomically thin transition metal dichalcogenides (TMDs) is crucial for the realization of high-performance optoelectronic applications. To this regard, a few chemical or physical approaches such as superacid treatment, electrical gating, dielectric screening, and laser irradiation have been developed. In particular, the laser irradiation appears to be a more efficient way with good processability and spatial selectivity. However, the underlying mechanism especially about whether chemisorption or physisorption plays a more important role is still debatable. Here, we unravel the mystery of laser irradiation induced photoluminescence enhancement in monolayer WS_(2) by precisely controlling irradiation time and environment. It is found that the synergetic effect of physisorption and chemisorption is responsible for the photoluminescence enhancement, where the physisorption dominates with more than 74% contribution. The comprehensive understanding of the adsorption mechanism in laser-irradiated TMDs may trigger the potential applications for patterned light source, effective photosensor and ultrathin optical memory.

关键词： WS_(2) photoluminescence laser irradiation physisorption chemisorption

Anisotropic polaritons in van der Waals materials

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InfoMat 2020年第5期2卷 777-790页

作者： Weiliang Ma Babar Shabbir Qingdong Ou Yemin Dong Huanyang Chen Peining Li Xinliang Zhang Yuerui Lu qiaoliang bao Wuhan National Laboratory for Optoelectronics Department of Materials Science and Engineering ARC Centre of Excellence in Future Low-Energy Electronics Technologies(FLEET)Monash UniversityClaytonVictoriaAustralia State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghaiChina School of Electronic Science and Engineering Xiamen UniversityXiamenFujian ProvinceChina Research School of Electrical Energy and Materials Engineeringthe Australian National UniversityCanberraAustralian Capital TerritoryAustralia

Polaritons in two-dimensional(2D)materials continues to garner significant attention due to their favorable ability of field-confinement and intriguing potential for low-loss and ultrafast optical and photonic *** recent experimental observation of in-plane anisotropic dispersion in natural van der Waals materials has revealed much richer physics as compared to isotropic plasmonic materials,which provides new insight to manipulate the polaritons and manufacture flat optical devices with unprecedented ***,we give an overview of the recent progress in in-plane anisotropic polaritons launched and visualized in the near-field range in 2D layered van der Waals ***,future prospects in this promising but emerging field are featured on the basis of its peculiar *** review article will stimulate the scientific community to explore other hyperbolic materials and structures in order to develop optical technologies with novel functionalities and further improve the understanding of the exotic photonic phenomena.

关键词： hyperbolic materials in-plane anisotropy optical and photonic devices polaritons scanning nearfield optical microscopy

Introduction to two-dimensional layered materials for ultrafast lasers

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Photonics Research 2018年第10期6卷 I0001-I0002页

作者： HAN ZHANG qiaoliang bao ZHIPEI SUN Collaborative Innovation Center for Optoelectronic Science & Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education College of Optoelectronic Engineering Department of Materials Science and Engineering Monash University Department of Electronics and Nanoengineering QTF Centre of Excellence Aalto University

We introduce the background and motivation of this feature issue of two-dimensional layered materials for ultrafast lasers. A brief summary of the seven collected articles in this feature issue is also given.

关键词：光子材料学发展现状技术创新

Highly responsive broadband black phosphorus photodetectors

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Chinese Optics Letters 2018年第2期16卷 3-7页

作者： Yan Liu Tian Sun Weiliang Ma Wenzhi Yu Shivananju B.Nanjunda Shaojuan Li qiaoliang bao Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devicesand Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhou 215123China Department of Materials Science and Engineering Monash UniversityClayton 3800Australia

Black phosphorus(BP)is a promising material for ultrafast and broadband photodetection because of its narrow bandgap from 0.35 eV(bulk)to 1.8 eV(monolayer)and high carrier *** photodetectors based on BP with different configurations have been reported,high photosensitivity was mostly observed in the visible range.A highly efficient BP-based infrared photodetector operated in the telecom spectral range,especially at 1550 nm,has not been ***,we report a Schottky-type photodetector based on thin BP flakes,operating in a broad spectral range from visible(635 nm)to infrared(1550 nm).A responsivity as high as 230 A·W^(-1)was achieved at 1550 nm with a source-drain bias of 1 *** rise time is 4.8 ms,and the fall time is 6.8 *** light illumination and external bias,the Schottky barrier between the BP and metal was reduced,leading to efficient photocurrent *** unprecedented performance of the BP photodetector indicates intriguing potential for sensing,imaging,and optical communication.

关键词： Atomic force microscopy Infrared imaging Light beams Photodetectors Raman spectroscopy Scanning electron microscopy

Revealing the Intrinsic Peroxidase-Like Catalytic Mechanism of Heterogeneous Single-Atom Co-MoS2

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Nano-Micro Letters 2019年第4期11卷 778-790页

作者： Ying Wang Kun Qi Shansheng Yu Guangri Jia Zhiliang Cheng Lirong Zheng Qiong Wu qiaoliang bao Qingqing Wang Jingxiang Zhao Xiaoqiang Cui Weitao Zheng Key Laboratory of Automobile Materials of MOE School of Materials Science and EngineeringJilin University2699 Qianjin StreetChangchun 130012People’s Republic of China Department of Materials Science and Engineering ARC Centre of Excellence in Future Low-Energy Electronics Technologies(FLEET)Monash UniversityClaytonVIC 3800Australia Key Laboratory of Photonic and Electronic Bandgap Materials Ministry of EducationCollege of Chemistry and Chemical EngineeringHarbin Normal UniversityHarbin 150025People’s Republic of China Department of Bioengineering University of Pennsylvania210 South 33rd Street240 Skirkanich HallPhiladelphiaPA 19104USA Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100190People’s Republic of China School of Chemistry and Chemical Engineering MOE Key Laboratory of Micro-System and Micro-Structure ManufacturingHarbin Institute of TechnologyHarbin 150001People’s Republic of China

The single-atom nanozyme is a new concept and has tremendous prospects to become a next-generation ***,few studies have been carried out to elucidate the intrinsic mechanisms for both the single atoms and the supports in single-atom ***,the heterogeneous single-atom Co-MoS2(SA Co-MoS2)is demonstrated to have excellent potential as a high-performance peroxidase *** of the well-defined structure of SA Co-MoS2,its peroxidase-like mechanism is extensively interpreted through experimental and theoretical *** to the different adsorption energies of substrates on different parts of SA Co-MoS2 in the peroxidase-like reaction,SA Co favors electron transfer mechanisms,while MoS2 relies on Fenton-like *** different catalytic pathways provide an intrinsic understanding of the remarkable performance of SA *** present study not only develops a new kind of single-atom catalyst(SAC)as an elegant platform for understanding the enzyme-like activities of heterogeneous nanomaterials but also facilitates the novel application of SACs in biocatalysis.

关键词： Biocatalysis Nanozymes Peroxidase mimic Reaction mechanisms Single-atom catalysts

Diffraction-limited imaging with monolayer 2D material-based ultrathin flat lenses

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Light(Science & Applications) 2020年第1期9卷 696-706页

作者： Han Lin Zai-Quan Xu Guiyuan Cao Yupeng Zhang Jiadong Zhou Ziyu Wang Zhichen Wan Zheng Liu Kian Ping Loh Cheng-Wei Qiu qiaoliang bao baohua Jia Centre for Translational Atomaterials Faculty of ScienceEngineering and TechnologySwinburne University of TechnologyP.O.Box 218HawthornVIC 3122Australia Department of Materials Science and Engineering ARC Centre of Excellence in Future Low-Energy Electronics Technologies(FLEET)Monash UniversityWellington RoadClaytonVIC 3800Australia School of Mathematical and Physical Sciences Faculty of ScienceUniversity of Technology Sydney15 BroadwayUltimoNSW 2007Australia Institute of Microscale Optoelectronics Lab of Artificial Microstructure for OptoelectronicsShenzhen University518000 ShenzhenChina School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Department of Chemistry National University of SingaporeSingapore 117543Singapore Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore The Australian Research Council(ARC)Industrial Transformation Training Centre in Surface Engineering for Advanced Materials(SEAM) Swinburne University of TechnologyP.O.Box 218HawthornVIC 3122Australia

Ultrathin flat optics allow control of light at the subwavelength scale that is unmatched by traditional refractive *** approach the atomically thin limit,the use of 2D materials is an attractive possibility due to their high refractive ***,achievement of diffraction-limited focusing and imaging is challenged by their thickness-limited spatial resolution and focusing *** we report a universal method to transform 2D monolayers into ultrathin flat *** laser direct writing was applied to generate local scattering media inside a monolayer,which overcomes the longstanding challenge of obtaining sufficient phase or amplitude modulation in atomically thin 2D *** achieved highly efficient 3D focusing with subwavelength resolution and diffractionlimited *** high focusing performance even allows diffraction-limited imaging at different focal positions with varying *** work paves the way for downscaling of optical devices using 2D materials and reports an unprecedented approach for fabricating ultrathin imaging devices.

关键词： ultrathin scattering optics

Graphene plasmonic nanoresonators/graphene heterostructures for efficient room-temperature infrared photodetection

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半导体学报：英文版 2020年第7期41卷 54-60页

作者： Tian Sun Weiliang Ma Donghua Liu Xiaozhi bao Babar Shabbir Jian Yuan Shaojuan Li Dacheng Wei qiaoliang bao Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200433China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering(IAPME)University of MacaoMacaoChina School of Physics and Electronic Information Huaibei Normal UniversityHuaibei 235000China State Key Laboratory of Applied Optics Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Department of Materials Science and Engineering and ARC Centre of Excellence in Future Low-Energy Electronics Technologies(FLEET)Monash UniversityClaytonVictoria 3800Australia

High-performance infrared(IR)photodetectors made by low dimensional materials promise a wide range of applications in communication,security and ***,light-harvesting effects based on novel plasmonic materials and their combinations with two-dimensional(2 D)materials have raised tremendous interest in recent years,as they may potentially help the device complement or surpass currently commercialized IR *** is a particularly attractive plasmonic material because graphene plasmons are electrically tunable with a high degree of electromagnetic confinement in the mid-infrared(mid-IR)to terahertz regime and the field concentration can be further enhanced by forming ***,we report an efficient mid-IR room-temperature photodetector enhanced by plasmonic effect in graphene nanoresonators(GNRs)/graphene *** plasmon polaritons in GNRs are size-dependent with strong field *** that the size and density of GNRs are controllable by chemical vapor deposition method,our work opens a cost-effective and scalable pathway to fabricate efficient IR optoelectronic devices with wavelength tunability.

关键词： graphene plasmons nanoresonators s-SNOM mid-infrared photodetectors

Probing the dynamic structural changes of DNA using ultrafast laser pulse in graphene-based optofluidic device

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InfoMat 2021年第3期3卷 316-326页

作者： Bannur NShivananju Lu Zhou Yuefeng Yin Wenzhi Yu Babar Shabbir Haoran Mu Xiaozhi bao Yiqiu Zhang Sun Tian Qingdong Ou Shaojuan Li Mohammad MHossain Yupeng Zhang Huaiyu Shao Guichuan Xing Nikhil V.Medhekar Chang-Ming Li Jian Liu qiaoliang bao Institute of Advanced Cross-field Science College of Life ScienceQingdao UniversityQingdaoPeople's Republic of China Department of Materials Science and Engineering ARC Centre of Excellence in Future Low-Energy Electronics Technologies(FLEET)Monash UniversityClaytonVictoriaAustralia Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhouPeople's Republic of China College of Electronic Science and Technology and College of Optoelectronics Engineering Shenzhen UniversityShenzhenPeople's Republic of China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering(IAPME)University of MacaoMacaoPeople's Republic of China Institute of Material Science and Devices Suzhou University of Science and TechnologySuzhouPeople's Republic of China

The ultrafast monitoring of deoxyribonucleic acid(DNA)dynamic structural changes is an emerging and rapidly growing research topic in *** existing optical spectroscopy used to identify different dynamical DNA structures lacks quick response while requiring large consumption of samples and bulky instrumental *** is highly demanded to develop an ultrafast technique that monitors DNA structural changes with the external stimulus or cancer-related disease ***,we demonstrate a novel photonic integrated graphene-optofluidic device to monitor DNA structural changes with the ultrafast response *** approach is featured with an effective and straightforward design of decoding the electronic structure change of graphene induced by its interactions with DNAs in different conformations using ultrafast nanosecond pulse laser and achieving refractive index sensitivity of~3×10^(−5) *** innovative technique for the first time allows us to perform ultrafast monitoring of the conformational changes of special DNA molecules structures,including G-quadruplex formation by K+ions and i-motif formation by the low pH *** graphene-optofluidic device as presented here provides a new class of label-free,ultrafast,ultrasensitive,compact,and cost-effective optical biosensors for medical and healthcare applications.

关键词： DNA optical biosensor graphene optofluidic device two-dimensional materials ultrafast fiber laser

单元素二维材料及其衍生物作为电荷传输层在太阳能电池中应用的研究进展

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高等学校化学学报 2021年第2期42卷 412-431页

作者：林生晃傅年庆鲍桥梁松山湖材料实验室东莞523808 华南理工大学材料科学与工程系广州510641 蒙纳士大学材料科学与工程系维多利亚3800澳大利亚中国科学院长春光学精密机械与物理研究所应用光学国家重点实验长春130022

随着环境污染的日益严重和能源危机的不断加剧,新能源的开发和利用逐渐成为研究的重点.在各种已开发的绿色能源技术中,光伏发电是一种非常有前景的技术.尽管传统硅基太阳能电池已取得长足进步,但其性价比与传统能源相比仍有差距.因此,... 详细信息

随着环境污染的日益严重和能源危机的不断加剧,新能源的开发和利用逐渐成为研究的重点.在各种已开发的绿色能源技术中,光伏发电是一种非常有前景的技术.尽管传统硅基太阳能电池已取得长足进步,但其性价比与传统能源相比仍有差距.因此,开发低成本高效太阳能电池迫在眉睫,但新型太阳能电池的应用仍受到稳定性差与效率较低的双重考验.在前期研究基础上,人们将化学和物理性能优异的单元素二维材料及其衍生物作为电荷传输层引入太阳能电池中,在改善电池稳定性及提升效率方面取得了积极的效果.本文综合评述了纳米级单元素二维材料及其衍生物作为太阳能电池电荷传输层的相关研究进展.这些单元素材料的引入使得所研究的太阳能电池效率得到了显著的提高,同时也证明该类型电荷传输层的构建为满足现代社会能源需求提供了新技术平台.文章最后讨论了单元素二维材料在太阳能电池中应用面临的关键挑战和发展前景.

关键词：太阳能电池单元素二维材料电荷传输层效率