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A Versatile Tetraphenylethene Derivative Bearing Excitation Wavelength Dependent Emission,Multistate Mechanochromism,Reversible Photochromism,and Circularly Polarized Luminescence and Its Applications in Multimodal Anticounterfeiting

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CCS Chemistry 2023年第7期5卷 1663-1673页

作者： Qing Xia Weiwei Xie Tingchao He Hongyan Zhang Zujin Zhao Guangxi Huang Bing Shi Li Ben Zhong Tang Key Laboratory of New Lithium-Ion Batteries and Mesoporous Materials College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhenGuangdong 518055 College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhenGuangdong 518060 State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSCUT-HKUST Joint Research InstituteSouth China University of TechnologyGuangzhouGuangdong 510641 School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhenGuangdong 518172

Multimodal anticounterfeiting has become increasingly challenging in modern society to guarantee information security and the safety of *** this study,a versatile cholesterol-containing tetraphenylethene derivative is shown to have multiple optical properties,including stimuli-responsive fluorescence,reversible photochromism,excitation wavelength dependent luminescence,and circularly polarized *** the application of diverse processing methods(writing,screen painting,drawing,and pyrography),we found that this molecule can serve as an anticounterfeiting toolbox to provide rich anticounterfeiting effects through the synergistical use of multiple optical *** work offers important insight for designing novel small organic molecules for advanced multimodal anticounterfeiting technology.

关键词： mechanochromism photochromism excitation wavelength dependent luminescence circularly polarized luminescence anticounterfeiting

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Deep-learning-based methods for super-resolution fluorescence microscopy

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Journal of Innovative Optical Health Sciences 2023年第3期16卷 85-100页

作者： Jianhui Liao Junle Qu Yongqi Hao Jia Li Shenzhen Key Laboratory of Photonics and Biophotonics Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060P.R.China NARI Group Corporation(State Grid Electric Power Research Institute)NARI Technology Co. Ltd.Nanjing 211106P.R.China

The algorithm used for reconstruction or resolution enhancement is one of the factors affectingthe quality of super-resolution images obtained by fluorescence ***-learning-basedalgorithms have achieved stateof-the-art performance in super-resolution fluorescence micros-copy and are becoming increasingly *** firstly introduce commonly-used deep learningmodels,and then review the latest applications in terms of the net work architectures,the trainingdata and the loss ***,we discuss the challenges and limits when using deeplearning to analyze the fluorescence microscopic data,and suggest ways to improve the reliability and robustness of deep learning applications.

关键词： Super-resolution fuorescence microscopy deep learning convolutional neural net-work generative adversarial network image reconstruction

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Soliton self-frequency shifts control via Pearcey Gaussian pulses in GRIN fiber

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Waves in Random and Complex Media 2023年

作者： Zhang, Xiang Li, Haozhe Chen, Changshui Zhang, Lifu Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices & Guangzhou Key Laboratory for Special Fiber Photonic Devices School of Information Optoelectronic Science and Engineering South China Normal University Guangzhou China International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology Institute of Microscale Optoelectronic Shenzhen University Shenzhen China

We numerically investigate the nonlinear propagation dynamics of the Pearcey-Gaussian (PG) pulse in the presence of spatial self-imaging and Raman scattering effects in a Graded-index (GRIN) multimode optical fiber. We demonstrate that the Raman-induced frequency shift (RIFS) can be effectively controlled when PG pulse is incident. We find that the decrease of parameter (Formula presented.) can lead to the increase of full width at half maximum (FWHM) of the red-shifted solitons and RIFS of PG pulses. In addition, the effects of the FWHM of the incident pulse and the initial chirps of the PG pulse on the RIFS are also considered. These results can broaden the application range of PG pulses in RIFS-based tunable light sources, optical communication and spectroscopy, and provide some inspiration for the PG and its derivative pulses in other nonlinear optical systems. © 2023 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Nonlinear optics

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Efficient screening framework for organic solar cells with deep learning and ensemble learning

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npj Computational Materials 2023年第1期9卷 295-305页

作者： Hongshuai Wang Jie Feng Zhihao Dong Lujie Jin Miaomiao Li Jianyu Yuan Youyong Li Institute of Functional Nano&Soft Materials(FUNSOM) Soochow University199 Ren’ai RoadSuzhou 215123 JiangsuPR China Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Soochow University199 Ren-Ai RoadSuzhou Industrial ParkSuzhouJiangsu 215123PR China School of Materials Science and Engineering and Tianjin Key Laboratory of Molecular Optoelectronic ScienceTianjin UniversityTianjin 300072China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow UniversitySuzhou 215123 JiangsuPR China Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyTaipa999078 MacaoSARChina

Organic photovoltaics have attracted worldwide interest due to their unique advantages in developing low-cost,lightweight,and flexible power *** molecular design and synthesis have been put forward to accelerate the discovery of ideal organic ***,it is extremely expensive to conduct experimental screening of the wide organic compound *** we develop a framework by combining a deep learning model(graph neural network)and an ensemble learning model(Light Gradient Boosting Machine),which enables rapid and accurate screening of organic photovoltaic *** framework establishes the relationship between molecular structure,molecular properties,and device *** framework evaluates the chemical structure of the organic photovoltaic molecules directly and *** it does not involve density functional theory calculations,it makes fast *** reliability of our framework is verified with data from previous reports and our newly synthesized organic *** work provides an efficient method for developing new organic optoelectronic materials.

关键词： materials ensemble verified

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Comparison of the emission wavelengths by a single fluorescent dye on in vivo 3-photon imaging of mouse brains

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Journal of Innovative Optical Health Sciences 2023年第6期16卷 23-30页

作者： Ke Wang Wanjian Zhang Xiangquan Deng Shen Tong Hui Cheng Mengyuan Qin Lei Zheng Kun Zhao Ruizhan Zhai Zhongqing Jia Ping Qiu Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 P.R.China Laser Institute Qilu University of Technology(Shandong Academy of Sciences)Qingdao Shandong 266000 P.R.China

Multiphoton microscopy(MPM)is a powerful imaging technology for brain *** imaging depth in MPM is partly determined by emission wavelength of fluorescent *** has been demonstrated that a longer emission wavelength is favorable for signal detection as imaging depth ***,there has been no comparison with near-infrared(NIR)*** order to quantitatively analyze the effect of emission wavelength on 3-photon imaging of mouse brains in vivo,we utilize the same excitation wavelength to excite a single fluorescent dye and simultaneously collect NIR and orange-red emission fluorescence at 828 nm and 620 nm,*** experimental and simulation results show that as the imaging depth increases,NIR emission decays less than orange-red fluorescent *** results show that it is preferable to shift the emission wavelength to NIR to enable more e±cient signal collection deep in the brain.

关键词： 3-Photon microscopy emission fluorescence FM4-64 Monte Carlo.

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Crystal Growth Promotion Enables High-Performance Te0.7Se0.3 Thin-Film Shortwave Infrared Photodetector for Multispectral Imaging Applications

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Advanced Functional Materials 2025年

作者： Li, Hongbo Li, Chuanhao Peng, Meng Li, Kanghua Chen, Chao Chen, Yuexing Zheng, Zhuanghao Su, Zhenghua Liang, Guangxing Chen, Shuo Institute of Thin Film Physics and Applications Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province State Key Laboratory of Radio Frequency Heterogeneous Integration College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China Huazhong University of Science and Technology Wuhan430074 China

Tellurium-selenium (TexSe1-x) alloy compound is considered as an excellent light absorber layer for thin-film photodetector applications, owing to its suitable bandgap and excellent optoelectronic performance. Recently, the research on TexSe1-x photodetectors has achieved considerable progress, especially under electron and/or hole transport layer engineering to improve the device responsivity. However, the intrinsic growth mechanism of TexSe1-x thin film still needs investigation. In this work, based on the analysis of crystal growth thermodynamics and kinetics, Te0.7Se0.3 light absorber with optimal (100) growth orientation can be achieved through thermal evaporation of pre-alloyed Te0.7Se0.3 powder and atmosphere-assisted slow thermal annealing of Te0.7Se0.3 thin film. Thanks to the optimized Te0.7Se0.3 light absorber and Te0.7Se0.3/ZnO heterojunction interface, the champion self-powered thin-film photodetector possesses a wide spectral response range of 300–1600 nm, minimized dark current density of 3.1 × 10−5 mA cm−2, accompanied with satisfactory responsivity of 0.06 A W−1 and detectivity of 5.9 × 109 Jones at 1300 nm, and linear dynamic range exceeding 101 dB. Interestingly, an imaging system based on this photodetector can achieve high-precision color imaging and multispectral imaging from visible light to short wave infrared light, highlighting the intriguing application potential of Te0.7Se0.3 photodetectors. © 2025 Wiley-VCH GmbH.

关键词： Heterojunctions

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Microenvironment-responsive chemotherapeutic nanogels for enhancing tumor therapy via DNA damage and glutathione consumption

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Chinese Chemical Letters 2022年第9期33卷 4197-4202页

作者： Mengjie Ye Yuan Gao Mengyun Liang Wei Qiu Xian bin Ma Jiming Xu Junfeng Hu Peng Xue Yuejun Kang Zhigang Xu Key Laboratory of Luminescence Analysis and Molecular Sensing(Southwest University) Ministry of EducationSchool of Materials and Energy and Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and DevicesSouthwest UniversityChongqing 400715China Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province College of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158China

Although targeted therapy and immunotherapy are now shining in the treatment of some cancers,chemotherapy is still the cornerstone of drug treatment for many cancer *** emergence of chemotherapy prodrugs can improve the drug activity and reduce the side effects of *** used,the tumor microenvironment has characteristics different from normal tissues,and the existence of the microenvironment provided a more convenient way to design responsive ***,we designed a glutathione(GSH)-responsive prodrug nanogels for enhancing tumor *** the nanogels of HHNP,10-hydroxycamptothecin(HCPT)played an essential role in killing cancer *** was jointed with a cross-linker agent with disulfide bond and was further coated with polyethylene glycol,which not only prolonged the half-life of the drug,but also made HCPT accurate transport to the tumor fractions and achieved precise and controllable *** proposal of HHNP effectively retained the biological activity of the drug,and introduced functions such as targeting,selective release and biodegradation,which greatly improved the medical efficiency of the drug and effectively reduced the toxic and side *** chemotherapeutic prodrug nanogel offers a new window for constructing efficient drug delivery platform.

关键词： Nanogel Prodrug GSH-responsive DNA damage Chemotherapy

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Bright and tunable emissive monodisperse CsPbI3@Cs4PbI6 nanocomposites via a precise and controllable dissolution−recrystallization method

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Nano Research 2023年第1期16卷 1586-1594页

作者： Luyu Cao Bomei Liu Lin Huang Zhi Zhou Chong-Geng Ma Jian Zhang Jing Wang Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and TechnologiesSchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275China School of Materials Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275China College of Science Hunan Optical Agriculture Engineering Technology Research CenterHunan Agricultural UniversityChangsha 410128China CQUPT-BUL Innovation Institute Chongqing University of Posts and TelecommunicationsChongqing 400065China Engineering Research Center of Electronic Information Materials and Devices(Ministry of Education) Guangxi Key Laboratory of Information MaterialsGuangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialsSchool of Materials Science and EngineeringGuilin University of Electronic TechnologyGuilin 541004China

Nowadays,due to uncontrolled synthesis and lack of more direct and systematic evidences,the photoluminescence origin of“zero-dimensional”Cs4PbI6 remains great controversy and the luminescence cannot be *** we propose a controllable dissolution-recrystallization method to synthesize“emissive”and“non-emissive”Cs4PbI6 nanocrystals(NCs)*** comparing“emissive”and“non-emissive”Cs4PbI6 NCs,it is clearly proved that the visible emission in“emissive”Cs4PbI6 NCs comes from embedded CsPbI3 quantum dots(QDs).It is found for CsPbI3@Cs4PbI6 nanocomposites,methyl acetate(MeAC)and cyclohexane play an important role in dissolution and recrystallization respectively to obtain Cs4PbI6 matrix and CsPbI3 *** from this two-step method,the as-synthesized CsPbI3@Cs4PbI6 nanocomposites with CsPbI3 QDs uniformly distributed in Cs4PbI6 matrix are bright with photoluminescence quantum yield(PLQY)up to 71.4%and exhibit improved stability than CsPbI3 ***,utilizing its formation mechanism,the size of embedded CsPbI3 QDs can be controlled by reasonable designing the“dissolution”process,so that the luminescence of this CsPbI3@Cs4PbI6 nanocomposites can be adjusted in a wide range from green to red(554–630 nm).Our finding not only provides a novel method for synthesizing tunable“emissive”Cs4PbI6 NCs,but also makes clear the photoluminescence origin of“emissive”Cs4PbI6.

关键词： CsPbI3@Cs4PbI6 dissolution-recrystallization nanocomposites tunable emission

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SAR Images Change detection based on Sparse Coding and NMF 2

SAR Images Change Detection based on Sparse Coding and NMF

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2021 2nd International Conference on Applied Physics and Computing, ICAPC 2021

作者： Wang, Shaona Liu, Yang Wang, Yanan Li, Linlin Tianjin Key Laboratory of Optoelectronic Detection Technology and Systems School of Electrical and Electronic Engineering Tiangong University Tianjing China

There are many applications for SAR image change detection, from military and agriculture to detection and management. But in fact, there is the speckle noise in SAR images inevitably. Therefore, the difficulty to detect change is increased. For purpose of reducing the interference of noise, we propose an unsupervised feature learning method using the non-negative matrix factorization algorithm and an improved sparse coding algorithm. First, non-negative matrix factorization method is used to obtain a dictionary which contains spatial structure information. Then, in order to increase the discriminate ability, we extract features for each pixel and apply sparse coding. Finally, the result of SAR image change detection is generated by applying simple k-means clustering method to divide the learned features into two different clusters. The superior performance of the proposed method is verified on several real SAR image datasets through comparisons with several existing change detection techniques. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Synthetic aperture radar

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Non-Hermitian Physics in Mesoscopic Electron Transport Through Coupled Quantum Dots

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Chinese Physics Letters 2025年第4期42卷 114-124页

作者： Yiyang Li Jincheng Lu Chen Wang Jian-Hua Jiang School of Physical Science and Technology&Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow UniversitySuzhou215006China Key Laboratory of Intelligent Optoelectronic Devices and Chips of Jiangsu Higher Education Institutions School of Physical Science and TechnologySuzhou University of Science and TechnologySuzhou215009China Advanced Technology Research Institute of Taihu Photon Center School of Physical Science and TechnologySuzhou University of Science and TechnologySuzhou 215009China Department of Physics Zhejiang Normal UniversityJinhua321004China School of Biomedical Engineering Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei230026China Suzhou Institute for Advanced Research University of Science and Technology of ChinaSuzhou215123China School of Physical Sciences University of Science and Technology of ChinaHefei 230026China

We investigate electron mesoscopic transport in a three-terminal setup with coupled quantum dots and a magnetic *** mapping the original transport problem into a non-Hermitian Hamiltonian form,we study the interplay between the coherent couplings between quantum dots,the magnetic flux,and the dissipation due to the tunnel coupling with the reservoirs.

关键词： quantum dots magnetic fluxby electron mesoscopic transport non hermitian physics magnetic fluxand coherent couplings transport problem tunnel coupling

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