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Liquid crystal-based optical aptasensor for the sensitive and selective detection of Gram-negative bacteria

Science China Chemistry 2022年第10期65卷 2023-2030页

作者： Mengjun Liu Minmin Zhang Jiamei Chen Ruizhi Yang Zhaofan Huang Zhenping Liu Na Li Lingling Shui Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices School of Information and Optoelectronic Science and EngineeringSouth China Normal UniversityGuangzhou 510006China Joint Laboratory of Optofluidic Technology and Systems National Center for International Research on Green OptoelectronicsSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China

The sensitive and differential detection of Gram-negative bacteria is essential in food processing,environmental monitoring,and the daily chemical ***,we propose and validate a liquid crystal(LC)-based aptasensor for the ultrasensitive detection of Escherichia coli(***),a model of Gram-negative *** nematic liquid crystal of 4-cyano-4’-pentylbiphenyl(5 CB) molecules can be orderly or disorderly arranged at the LC-aqueous interface via different stimuli,causing changes in optical texture due to *** schlieren texture is observed when a mixture solution of aptamer and hexadecyl trimethyl ammonium bromide(CTAB) is dripped onto the segmented LC films on a copper *** specific binding of aptamers with target bacteria biomarkers liberates the CTAB molecules,which then self-assemble at the LC-aqueous interface to induce the vertical alignment of *** optical transition from bright to dark is therefore achieved via the LC molecular orientation and serves as an *** the prominent affinity and specificity of the aptamer,the established sensitive and selective *** assay shows an ultralow detection limit of 27 cfu/*** prepared aptasensor can also be applied for the sensitive and selective determination of *** in fruit juice,soft drink,and cosmetic products,and shows great promise for the on-site detection of Gram-negative bacteria with high sensitivity and specificity for environmental monitoring,food safety assessment,and household chemical inspection.

关键词： liquid crystal molecular arrangement optical sensor aptamer Gram-negative bacteria

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Dynamic Control of Multiple Optical Patterns of Cholesteric Liquid Crystal Microdroplets by Light-Driven Molecular Motors

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CCS Chemistry 2024年第2期6卷 427-438页

作者： Jiaqin Li Shuting Xie Jiahui Meng Yuying Liu Qi Zhan Yang Zhang Lingling Shui Guofu Zhou Ben L.Feringa Jiawen Chen SCNU-UG International Joint Laboratory of Molecular Science and Displays National Center for International Research on Green OptoelectronicsSouth China Normal UniversityGuangzhou 510006 Joint Laboratory of Optofluidic Technology and Systems Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and DevicesSchool of Information and Optoelectronic Science and EngineeringSouth China Normal UniversityGuangzhou 510006 Stratingh Institute for Chemistry University of Groningen9747AG Groningen

The key to high-level encryption and anti-counterfeiting techniques is the storage of multiple levels of distinct information that can be individually and precisely addressed by certain *** continues to be a formidable challenge as the concealed images or codes must be read with fast response and high resolution without cross-talk to the first layer of ***,we report a non-fluorescencebased strategy to establish responsive encryption labels taking advantage of solely tuning multiple optical patterns of cholesteric liquid crystal(CLC)microdroplets doped with light-driven molecular *** photo-triggered unidirectional rotation of the motor induced not only changes in the helical twist power value but the opposite helical orientation of the superstructure in CLCs as well,resulting in changes in both the structural color and the selective reflection of circularly polar *** designed labels,which featured highly selective addressability of dual-level distinct information,good reversibility,and viewing angle-independence,were applied to build devices for daily practical use,demonstrating great potential in anti-counterfeiting technology and provide a versatile platform for enhanced data protection and encryption of authentic information.

关键词： molecular motor chirality amplification cholesteric liquid crystal anti-counterfeiting label data encryption

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Temporal line-shifting structured light for robust high-precision 3D reconstruction

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Optics Express 2025年第13期33卷 27255-27269页

作者： Qiyun Zeng Zhihao Huang Xiao Yu Wenqi He Xiaoli Liu Xiang Peng Qijian Tang Key Laboratory of Optoelectronic Devices and System of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 China Shenzhen Anhua Optoelectronics Technology Co. Ltd. Shenzhen 518055 China

With the continuous growth of demand for 3D reconstruction technology in the industrial automation field, traditional methods face significant challenges when applied to high-reflectivity and high-dynamic-range environments. Although techniques such as fringe projection profilometry and line laser scanning are widely used, they often suffer from issues like data loss, accuracy degradation, and inefficiency in complex scenarios. To address these challenges, we propose what we believe to be a novel 3D reconstruction method based on temporal line-shifting structured light. This method performs intensity encoding over time for each spatial pixel by projecting a series of binary line-shifting patterns, obtains the temporal center via the temporal grayscale centroid method, and removes periodic ambiguity using complementary Gray codes. This paper further establishes a mapping model between the temporal center and depth to ultimately achieve 3D reconstruction. Experimental results demonstrate that the method has advantages in both accuracy and robustness, particularly demonstrating superior performance in complex environments, and holds significant application prospects in industrial automation inspection.

关键词： Imaging systems Machine vision Optical imaging Point clouds Three dimensional imaging Three dimensional reconstruction

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The stretchable perovskite-based alternating current electroluminescence for human-device interaction

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Science Bulletin 2024年第18期69卷 2807-2810页

作者： Wenjuan Zhu Bing Chen Dengfeng Peng College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

In the ever-evolving landscape of flexible electronics and wearable technologies,the pursuit of advanced interactive systems that seamlessly integrate with the human body has become a paramount endeavor[1].This drive stems from the increasing demand for wearable devices that not only offer sophisticated functionalities but also provide comfort and aesthetic appeal when worn directly on the human skin[2].Central to this innovation trend are wearable displays,the visual interfaces that bridge the gap between users and the vast expanse of digital *** traditional rigid and flat displays,the next-generation wearable displays are boasting foldability and stretchability,as well as an innate ability to conform to the dynamic contours of human skin,thereby revolutionizing the way we interact with contemporary science and technology[3].

关键词： stretch thereby interaction

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Gate-tunable positive and negative photoresponses based on a mixed-dimensional Ga_(2)O_(3)/WSe_(2) junction field-effect transistor for logic operation

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Photonics Research 2024年第12期12卷 2804-2811页

作者： ZIBIN HUANG WENHAI WANG SUJUAN WANG YANG CHEN HANZHE ZHANG LISHENG WANG HUIRU SUN YUAN PAN HONGYU CHEN XUN YANG FRANCIS CHI-CHUNG LING SHICHEN SU Institute of Semiconductor Science and Technology South China Normal UniversityFoshan 528225China College of Electrical Engineering Hebei University of ArchitectureZhangjiakou 075000China State Key Laboratory of Optoelectronic Materials and Technologies School of PhysicsSun Yat-sen UniversityGuangzhou 510275China Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Materials PhysicsMinistry of EducationSchool of Physics and Laboratory of Zhongyuan LightZhengzhou UniversityZhengzhou 450052China Department of Physics The University of Hong KongHong Kong 999077China

Realization of positive and negative optical responses in a single device promises construction of multifunctional optoelectronic *** work demonstrates a Ga_(2)O_(3)∕WSe_(2) mixed-dimensional heterojunction junction fieldeffect transistor(JFET)with positive and negative photoresponse regulatory functions by gate *** device achieves a remarkable negative responsivity exceeding 425 mA/***,benefiting from Fowler-Nordheim tunneling(FNT)behavior,the mixed-dimensional JFET exhibited an excellent negative response performance with response and decay times of 50.1 ms and 53.9 ms and a high I OFF∕I ON ratio of 343 at V ds1 V and Vg5 V under 635 nm ***,the JFET’s negative photoresponse is sensitive to both gate voltage and light intensity,which can be used to realize NAND logic gate and optical communication *** results unveil the promising potential of mixed-dimensional optoelectronic devices for optical communication,and logic device technologies.

关键词： transistor optoelectronic tunable

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基于低成本聚噻吩给体材料的卷对卷凹版印刷有机太阳能电池（英文）

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Science China Materials 2025年第5期68卷 1435-1444页

作者：祁伟涛袁熙越刘媛琪杨书涛储芸莎钱凡闫翎鹏王振国段春晖骆群马昌期 College of Materials Science and Engineering Taiyuan University of Technology i-Lab & Printable Electronics Research Center Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences (CAS) Institute of Polymer Optoelectronic Materials and Devices Guangdong Basic Research Center of Excellence for Energy & Information Polymer MaterialsState Key Laboratory of Luminescent Materials and DevicesSouth China University of Technology

目前有机太阳能电池（OSCs）的能量转换效率（PCE）已超过20%,但大面积低成本有机太阳能电池的发展相对滞后.实现有机太阳能电池的低成本化,需要从材料和制备工艺两个方面进行突破;其中材料方面,聚噻吩是一种低成本的给体材料;制备工艺... 详细信息

目前有机太阳能电池（OSCs）的能量转换效率（PCE）已超过20%,但大面积低成本有机太阳能电池的发展相对滞后.实现有机太阳能电池的低成本化,需要从材料和制备工艺两个方面进行突破;其中材料方面,聚噻吩是一种低成本的给体材料;制备工艺方面,凹版印刷是一种可二维图案化、高速、高精度和低成本的大面积制备方法.为了实现低成本的OSCs,本工作采用低成本的聚噻吩材料为给体材料,通过卷对卷的凹版印刷技术制备了柔性OSCs.一方面,我们通过调节活性层油墨的浓度来调控活性层油墨的粘度,明显减弱了流动条纹,获得了均匀的印刷薄膜.另一方面,我们通过温度调节,明显抑制了凹印活性层薄膜微观形貌的过度聚集,获得了较优的微观形貌.最终,通过卷对卷凹版印刷制备1 cm2的柔性OSCs,获得了10.55%的器件效率,与旋涂器件相当.该结果表明低成本的聚噻吩材料体系可以通过卷对卷凹版印刷的方法制备,且有望大幅降低有机光伏的生产成本.

关键词： flexible OSCs gravure printing active layer polythiophene viscosity

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Sensitivity-enhanced refractive index sensor based on exposed-core single-hole microstructured fiber 13

Sensitivity-enhanced refractive index sensor based on expose...

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13th International Conference on Information Optics and Photonics, CIOP 2022

作者： Li, Ye Wu, Jixuan Song, Binbin Zhang, Cheng Gao, Xinliang Huang, Kaixing Tianjin Key Laboratory of Optoelectronic Detection Technology and Systems School of Electronic and Information Engineering Tiangong University Tianjin300387 China Key Laboratory of Computer Vision and Systems Ministry of Education School of Computer Science and Engineering Tianjin University of Technology Tianjin300384 China

ISBN: (纸本)9781510660632

Microstructured fibers with geometric versatility, and exceptional guiding properties, show unique advantage in constructing high-performance sensors. In this paper, a sensitivity-enhanced fiber-optic sensor based on an exposed-core single-hole microstructured fiber (SHMF) is proposed and experimentally demonstrated for the refractive index (RI) measurement of liquid samples. Experimental results show that the RI sensitivity of the exposed-core microstructured fiber is 375.77 nm/RIU in the low-range of 1.3409~1.3522. With the advantages of enhanced light-matter interaction ability, tight light confinement and mechanical robustness, the proposed sensor based on exposed-core single-hole microstructured fiber offers great potential in biological and chemical sensing applications. © 2022 SPIE.

关键词： Fiber optic sensors

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Flexible transparent electrode based on work function difference promoting electron transfer and applied to transparent TFT

Flexible transparent electrode based on work function differ...

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第七届粤港澳真空科技创新发展论坛暨2023年广东省真空学会学术年会

作者： Zhihao Liang Xiao Fu Yubin Fu Honglong Ning Rihui Yao Junbiao Peng Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of Technology

With the development of the times,people have higher requirements for the transparency of electronic *** traditional transparent oxide electrodes,such as ITO and AZO,have a high transmittance but also a high resistivity,and the quality factor is generally below ***,in this paper,IZO-CuCrZr-IZO multilayer electrode is investigated as an innovative transparent *** ICI transparent electrode is prepared by using the difference of work function to make the electron transfer spontaneously to form a high conductivity *** ICI electrode obtained a transmittance 75.1 % while the resistivity is only 21.6 μΩ·cm and the quality factor is as high as *** addition,the flexible performance of the electrode was *** results show that the resistivity only increases to 29.6 μΩ·cm after 10000-times bending,so ICI electrode has good bending ***,the effect of annealing temperature and sputtering power on the electrode was ***,the transparent TFT was prepared under the optimal *** transmittance of the TFT is up to 93.6%,and meanwhile the mobility was 68.6 cm2/Vs,the switching ratio was 2.18×106,the threshold voltage was 3.64 V,and the threshold swing was 0.12 V.

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Effects of Strain Channel on Electron Irradiation Tolerance of InP-based HEMT Structures

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原子能科学技术 2023年第12期57卷 2288-2294页

作者： FANG Renfeng CAO Wenyu WEI Yanfeng WANG Yin CHEN Chuanliang YAN Jiasheng XING Yan LIANG Guijie ZHOU Shuxing Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices Hubei University of Arts and ScienceXiangyang 441053China Hubei Key Laboratory of High Power Semiconductor Technology Hubei TECH Semiconductor Co.LtdXiangyang 441021China Hubei Longzhong Laboratory Xiangyang 441000China

The introduction of strain In_(x)Ga_(1-x)As channel with high In content increases the confinement of the two-dimensional electron gas(2DEG)and further improves the high-frequency performance of InGaAs/InAlAs/InP *** effect of In_(x)Ga_(1-x)As channel with different In contents on electron irradiation tolerance of InP-based HEMT structures in terms of 2DEG mobility and density has been *** experiment results show that,after the same high electron irradiation dose,the 2DEG mobility and density in InP-based HEMT structures with strain In_(x)Ga_(1-x)As(x>0.53)channel decrease more dramatically than that without strain In_(0.53)Ga_(0.47)As ***,the degradation of 2DEG mobility and density becomes more severe as the increase of In content and strain in the In_(x)Ga_(1-x)As *** research results can provide some suggestions for the design of radiation-resistant InP-based HEMTs.

关键词： InP-based HEMT strain channel two-dimensional electron gas electron irradiation

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具有超强二阶非线性响应及优良防潮性能的一种中性分子型DMPO有机新材料

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Science China Materials 2024年第7期67卷 2285-2292页

作者：安然许向东李丙轩韩俊孙瑞良张敏刚蒋亚东 State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 611731China Fujian Institute of Research on the Structure of Matter Chinese Academy of SciencesFuzhou 350102China

具有强光学非线性和高稳定性的非线性光学(NLO)有机材料因其潜在的广泛应用而备受关注.本研究中,我们设计并系统地研究了具有超强二阶非线性光学响应的一种新型NLO查尔酮衍生物—1-(4-甲氧基苯基)-3-(4-乙氧基苯基)-2-丙烯基-1-酮(DMPO)... 详细信息

具有强光学非线性和高稳定性的非线性光学(NLO)有机材料因其潜在的广泛应用而备受关注.本研究中,我们设计并系统地研究了具有超强二阶非线性光学响应的一种新型NLO查尔酮衍生物—1-(4-甲氧基苯基)-3-(4-乙氧基苯基)-2-丙烯基-1-酮(DMPO).合成得到的这种新设计的DMPO仅在5天内即可快速生长出尺寸为10×5×4 mm^(3)的DMPO单晶.这些DMPO晶体由中性有机分子组成,它们在较宽的波段600–1800 nm范围具有高透明性,还拥有适度的光学带隙(2.51 eV),并展现出卓越的抗潮解性能.重要的是,DMPO实测的二次谐波产生(SHG)响应高达基准材料4-(4-二甲氨基苯乙烯基)甲基吡啶对甲苯磺酸盐(DAST)的1.86倍,证实了DMPO具有优良的宏观二阶光学非线性性质.因此,DMPO是集多种优点于一身的一种有机NLO新材料,可广泛应用于NLO领域.

关键词： organic nonlinear material DMPO simulations measurements SHG

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