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A CRISPR/Cas12a-empowered surface plasmon resonance platform for rapid and specific diagnosis of the Omicron variant of SARS-CoV-2

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National science Review 2022年第8期9卷 100-109页

作者： Zhi Chen Jingfeng Li Tianzhong Li Taojian Fan Changle Meng Chaozhou Li Jianlong Kang Luxiao Chai Yabin Hao Yuxuan Tang Omar A.Al-Hartomy Swelm Wageh Abdullah G.Al-Sehemi Zhiguang Luo Jiangtian Yu Yonghong Shao defa Li Shuai Feng William J.Liu Yaqing He Xiaopeng Ma Zhongjian Xie Han Zhang department of Physics Faculty of Science King Abdulaziz University Research Center for Advanced materials science (RCAMS) King Khalid University department of Chemistry College of Science King Khalid University Zhongmin (shenzhen) Intelligent Ecology Co.Ltd Key laboratory of Optoelectronic devices and Systems of ministry of education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University department of laboratory medicine Shenzhen Children’s Hospital optoelectronics Research Center School of Science Minzu University of China NHC Key laboratory of Biosafety National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and Prevention Research Unit of Adaptive Evolution and Control of Emerging Viruses Chinese Academy of Medical Sciences institute of Pathogenic Organism Shenzhen Center for Disease Control and Prevention shenzhen Engineering laboratory of Phosphorene and optoelectronics Respiratory department Shenzhen Children’s Hospital institute of Pediatrics Shenzhen Children’s Hospital international collaborative laboratory of {3. {4. for optoelectronics science and technology of ministry of education 3. shenzhen institute of translational {13. 4. department of otolaryngology Shenzhen Second People’s Hospital 5. the First Affiliated Hospital 6. Institute of Microscale Optoelectronics Shenzhen University 7. Shenzhen International Institute for Biomedical Research 8. Shenzhen Han’s Tech Limited Company 9. Shenzhen Metasensing Tech Limited Company

The outbreak of the COVId-19 pandemic was partially due to the challenge of identifying asymptomatic and presymptomatic carriers of the virus, and thus highlights a strong motivation for diagnostics with high sensitivity that can be rapidly deployed. On the other hand, several concerning SARS-Co V-2 variants,including Omicron, are required to be identified as soon as the samples are identified as ‘positive’.Unfortunately, a traditional PCR test does not allow their specific identification. Herein, for the first time,we have developed MOPCS(Methodologies of Photonic CRISPR Sensing), which combines an optical sensing technology-surface plasmon resonance(SPR) with the ‘gene scissors’ clustered regularly interspaced short palindromic repeat(CRISPR) technique to achieve both high sensitivity and specificity when it comes to measurement of viral variants. MOPCS is a low-cost, CRISPR/Cas12a-systemempowered SPR gene-detecting platform that can analyze viral RNA, without the need for amplification,within 3. min from sample input to results output, and achieve a limit of detection of 15 fM. MOPCS achieves a highly sensitive analysis of SARS-Co V-2, and mutations appear in variants B.1.617.2(delta),B.1.1.529(Omicron) and BA.1(a subtype of Omicron). This platform was also used to analyze some recently collected patient samples from a local outbreak in China, identified by the Centers for disease Control and Prevention. This innovative CRISPR-empowered SPR platform will further contribute to the fast, sensitive and accurate detection of target nucleic acid sequences with single-base mutations.

关键词： surface plasmon resonance CRISPR SARS-CoV-2 Omicron variant

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二维范德瓦尔斯异质结以及器件中的量子隧穿

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science China materials 2021年第10期64卷 2359-2387页

作者：樊思迪曹睿王路得高姗张豫鹏庾翔张晗 international collaborative laboratory of {3. {4. for optoelectronics science and technology of ministry of education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China

基于能带结构的量子隧穿技术在电学、光电学、磁学等领域有着广泛的应用.它主要依赖于层-层的设计和构建,是一个涵盖了材料科学和创新技术的跨学科研究领域.自从二维层状材料被发现以来,基于二维范德华异质结构的隧道器件作为下一代器... 详细信息

基于能带结构的量子隧穿技术在电学、光电学、磁学等领域有着广泛的应用.它主要依赖于层-层的设计和构建,是一个涵盖了材料科学和创新技术的跨学科研究领域.自从二维层状材料被发现以来,基于二维范德华异质结构的隧道器件作为下一代器件得到了广泛的研究.二维材料具有原子层级的厚度,表面光滑且没有悬挂键.基于这些特性,采用二维材料构建的范德瓦尔斯异质结被认为具有优于传统Si工艺的隧道性能,还可获得小尺寸器件.本文从机理与应用两个角度对二维范德瓦尔斯异质结中的量子隧穿现象进行了综述.此外,分析了二维隧道器件面临的可能性和挑战,同时提出了对未来开发应用的展望.二维隧道器件的技术研究和性能控制尚处于起步阶段,但在实现低功耗、高速以及高频功能方面已经成为有竞争力的候选器件.

关键词： quantum tunneling 2d materials van der Waals heterostructures 2d quantum devices

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具有超低开关电场的可控的易失性至非易失性单晶无铅双钙钛矿忆阻器

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science China materials 2023年第1期66卷 241-248页

作者：游琪黄富房菲儿祝家齐郑越方绍帆周勃李贺楠韩成时玉萌 international collaborative laboratory of {3. {4. for optoelectronics science and technology of ministry of education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China College of Electronics and Information Engineering Shenzhen UniversityShenzhen 518060China

全无机无铅双钙钛矿由于其优异的电子传输能力、高光敏性、低毒性和环境稳定性,为电子/光电存储器件提供了潜在的材料.然而,钙钛矿薄膜的多晶性质严重限制了器件性能.在此,我们展示了一种基于单晶双钙钛矿Cs_(2)AgBiBr_(6)的高性能忆阻... 详细信息

全无机无铅双钙钛矿由于其优异的电子传输能力、高光敏性、低毒性和环境稳定性,为电子/光电存储器件提供了潜在的材料.然而,钙钛矿薄膜的多晶性质严重限制了器件性能.在此,我们展示了一种基于单晶双钙钛矿Cs_(2)AgBiBr_(6)的高性能忆阻器,其具有6.67×10^(4.V m^(-1)的超低开关电场和10^(7)的高电流开/关比.值得注意的是,Cs_(2)AgBiBr_(6)的电阻开关行为与单晶钙钛矿的厚度相关,当单晶厚度从100到800 nm变化时,忆阻器从易失性的阈值开关行为演变为非易失性的忆阻开关行为.元素分析表明,Cs_(2)AgBiBr_(6)中导电通道的形成与具有低活化能Br空位的迁移有关.此外,形成的导电通道可以被具有不同波长和强度的光照湮灭,从而实现具有单独的电写入和光擦除的光电存储器.我们的研究结果为单晶钙钛矿中的离子迁移提供了深刻的见解,并为其在未来的电子和光电存储器中的应用提供了理论基础.

关键词：非易失性存储器忆阻器环境稳定性电子传输导电通道电阻开关离子迁移

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Bandgap engineering of high mobility two-dimensional semiconductors toward optoelectronic devices

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Journal of Materiomics 2023年第3期9卷 527-540页

作者： Qiaoyan Hao Peng Li Jidong Liu Jiarui Huang Wenjing Zhang international collaborative laboratory of {3. {4. for optoelectronics science and technology of ministry of education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen518060China shenzhen institute of Advanced Electronic materials Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518103China

Over the last few years,great advances have been achieved in exploration of high-mobility two-dimensional(2d)semiconductors such as metal chalcogenide InSe and noble-transition-metal dichal-cogenide PdSe_(2).These materials are competitive candidates for constructing next-generation optoelec-tronic devices owing to their unique crystalline and electronic structures.Moreover,the optical and electronic properties of 2d materials can be efficiently modified via precisely engineering their band structures,which is critical for widening specific applications ranging from high-performance opto-electronics to catalysis and energy harvesting.In this review,we focus on the progress in bandgaps engineering of newly emerging high-mobility 2d semiconductors and their applications in optoelec-tronic devices,incorporating our recent study in the InSe and PdSe_(2)systems.First of all,we discuss the structure-property relationship of typical high-mobility 2d semiconductors(InSe and PdSe 2).Next,we analyze several viable strategies for bandgap engineering,including thickness,strain or pressure,alloying,heterostructure,surface modification,intercalation,and so on.Furthermore,we summarize the optoelectronic devices fabricated with such high-mobility 2d semiconductors.The conclusion and outlook in this topic are finally presented.This review aims to provide valuable insights in bandgap engineering of newly emerging 2d semiconductors and explore their potential in future optoelectronic applications.

关键词： High mobility 2d semiconductors Bandgap engineering Alloying Heterostructure

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半异相碳化氮聚合物光催化协同过渡金属铜催化的交叉偶联反应

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science Bulletin 2022年第1期67卷 71-78,M0004页

作者：张钊飞徐杨森张启涛方绍帆孙宏丽欧伟苏陈良 international collaborative laboratory of {3. {4. for Optoelectronic science&technology of ministry of education Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong ProvinceInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China

近年,基于光催化与过渡金属催化的协同体系,发展有机反应新模式以及提高传统反应转化效率成为前沿领域研究热点.目前,多数光催化与金属催化的协同体系依赖于使用钌基、铱基贵金属均相催化剂或有机染料分子.此类催化剂价格昂贵、稳定性... 详细信息

近年,基于光催化与过渡金属催化的协同体系,发展有机反应新模式以及提高传统反应转化效率成为前沿领域研究热点.目前,多数光催化与金属催化的协同体系依赖于使用钌基、铱基贵金属均相催化剂或有机染料分子.此类催化剂价格昂贵、稳定性差、难以回收使用,限制了其实际推广应用.本文采用廉价、环境友好、可规模制备的碳化氮聚合物为异相半导体光催化剂,以廉价碘化亚铜为过渡金属催化剂,建立起半异相光与过渡金属铜的协同催化体系,实现了碳氢键芳基化,碳氢硫芳基化和碳氮偶联等多种成键反应模式,具有反应条件温和、产率良好、选择性高、底物范围广泛(超过60个例子)、易于放大合成(克级制备)等优点.在上述体系中,异相碳化氮半导体催化剂性能优于常见的均相贵金属催化剂,稳定性好,易回收,且多次循环使用仍能保持较高催化活性,具有良好的推广应用前景.

关键词：过渡金属交叉偶联反应芳基化贵金属催化剂均相催化剂光催化碘化亚铜金属催化

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Efficiently band-tailored type-Ⅲ van der Waals heterostructure for tunnel diodes and optoelectronic devices

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Nano Research 2022年第9期15卷 8442-8450页

作者： Xiangna Cong Yue Zheng Fu Huang Qi You Jian Tang Feier Fang Ke Jiang Cheng Han Yumeng Shi international collaborative laboratory of {3. {4. for optoelectronics science and technology of ministry of education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Key laboratory of Optoelectronic devices and Systems of ministry of education and Guangdong Province College of Physics&Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

Broken-gap(type-Ⅲ)two-dimensional(2d)van der Waals heterostructures(vdWHs)offer an ideal platform for interband tunneling devices due to their broken-gap band offset and sharp band edge.Here,we demonstrate an efficient control of energy band alignment in a typical type-ⅢvdWH,which is composed of vertically-stacked molybdenum telluride(MoTe2)and tin diselenide(SnSe2),via both electrostatic and optical modulation.By a single electrostatic gating with hexagonal boron nitride(hBN)as the dielectric,a variety of electrical transport characteristics including forward rectifying,Zener tunneling,and backward rectifying are realized on the same heterojunction at low gate voltages of±1 V.In particular,the heterostructure can function as an Esaki tunnel diode with a room-temperature negative differential resistance.This great tunability originates from the atomicallyflat and inert surface of h-BN that significantly suppresses the interfacial trap scattering and strain effects.Upon the illumination of an 885 nm laser,the band alignment of heterojunction can be further tuned to facilitate the direct tunneling of photogenerated charge carriers,which leads to a high photocurrent on/off ratio of>105 and a competitive photodetectivity of 1.03.1012 Jones at zero bias.Moreover,the open-circuit voltage of irradiated heterojunction can be switched from positive to negative at opposite gate voltages,revealing a transition from accumulation mode to depletion mode.Our findings not only promise a simple strategy to tailor the bands of type-ⅢvdWHs but also provide an in-depth understanding of interlayer tunneling for future low-power electronic and optoelectronic applications.

关键词： broken-gap(type-Ⅲ)heterostructure band tailoring single electrostatic gating infrared photodetector photovoltaic effects

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Li-richening strategy in Li_(2)ZrCl_(6) lattice towards enhanced ionic conductivity

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Journal of Energy Chemistry 2023年第4期79卷 348-356页

作者： Haochang Zhang Zhaozhe Yu Hannan Chen Yongjian Zhou Xiao Huang Bingbing Tian Guangxi Key laboratory of Manufacturing Systems and Advanced Manufacturing technology Guilin University of Electronic TechnologyGuilin 541004GuangxiChina international collaborative laboratory of {3. {4. for optoelectronics science and technology of ministry of education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060GuangdongChina

All-solid-state Li batteries(ASSLBs) with solid-state electrolytes(SSEs) are exciting candidates for nextgeneration energy storage and receive considerable attention owing to their reliability. Halide SSEs are promising candidates due to their excellent stability against 4.V-class layered cathodes. Compared with Li3.nCl6or Li_(3.ScCl_(6), the low ionic conductivity of Li_(2)ZrCl_(6)(LZC) is a challenge despite its low raw-material cost. Herein, we report a family of Li-Richened chloride, Li_(2+2x)Zr_(1–x)MxCl_(6), which can be used in highperformance ASSLBs owing to its high ionic conductivity(up to 0.62 mS cm^(-1)). The theoretical(ab initio molecular dynamics simulations) and experimental results prove that the strategy of aliovalent substitution with divalent metals to obtain Li-Richened LZC is effective in improving Li^(+)conductivity in SSEs. By combining Li_(2.1)Zr_(0.95)Mg_(0.05)Cl_(6)(Mg5-LZC) with a Li–In anode and a LiCoO_(2)cathode, a room-temperature ASSLBs with excellent long-term cycling stability(88% capacity retention at 0.3. for 100 cycles) and highrate capability(121 m A h g^(-1)at 1C) is reported. This exploratory work sheds light on improving the Li^(+)conductivity of low-cost LZC-family SSEs for constructing high performance ASSLBs.

关键词： Li-richening Li_(2)ZrCl_(6) Halide solid electrolyte All-solid-state battery Solid electrochemistry Li^(+)conductivity

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Two-dimensional tin diselenide nanosheets pretreated with an alkaloid for near-and mid-infrared ultrafast photonics

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Photonics Research 2020年第11期8卷 1687-1696页

作者： Zhenhong Wang Bin Zhang Bing Hu Zhongjun Li Chunyang Ma Yu Chen Yufeng Song Han Zhang Jun Liu Guohui Nie shenzhen Engineering laboratory of Phosphorene and optoelectronics Institute of Translational MedicineDepartment of OtolaryngologyShenzhen Second People's HospitalThe First Affiliated Hospital of Shenzhen UniversityHealth Science CenterInternational Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

Two-dimensional(2d)tin diselenide(SnSe2),a novel layered material with excellent optical and electronic properties,has been extensively investigated in various promising applications,including photodetectors,optical switching,and ultrafast photonics.In this work,SnSe2 nanosheets have been obtained after pretreatment in an alkaloid,exhibiting high optical absorption and electron-enriched properties.Besides,the performances of the prepared SnSe2 in near-infrared(NIR)and mid-infrared(MIR)ultrafast photonics are presented.Notably,by employing the SnSe2-deposited microfiber device as a saturable absorber(SA)exhibiting typical nonlinear optical absorption properties,stable ultrashort pulses and rogue waves are realized in an erbium-doped fiber laser.Furthermore,the SnSe2-deposited SA device is also applied to a thulium-doped fiber laser to achieve stable ultrashort pulses.This study indicates that SnSe2 is expected to be a suitable candidate for ultrafast fiber lasers in the NIR and MIR regions.

关键词： SnSe2 fiber ultrashort

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钙钛矿光电子器件中光致/电致载流子动力学调谐工程

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science China materials 2022年第4期65卷 855-875页

作者：张峰秘周郝伟仲陈华龙张俣乐赵晋津曹国忠张晗 collaborative Innovation Center for Optoelectronic science and technology {3. collaborative laboratory of 2d materials for optoelectronics science and technology of ministry of education {13. of Microscale optoelectronics Shenzhen UniversityShenzhen518060China School of materials science and Engineering Shijiazhuang Tiedao UniversityShijiazhuang050043China department of materials science and Engineering University of WashingtonSeattleWA98195-2120USA

过去十年以来,具有非辐射复合损失低、载流子寿命和扩散长度长等优异特征的有机金属卤化物钙钛矿在光伏技术领域取得了长足进展.有机金属卤化物钙钛矿具有卓越的光学性能和易于制备的特征,其在电光和光电转换中得到广泛应用.本文讨论了... 详细信息

过去十年以来,具有非辐射复合损失低、载流子寿命和扩散长度长等优异特征的有机金属卤化物钙钛矿在光伏技术领域取得了长足进展.有机金属卤化物钙钛矿具有卓越的光学性能和易于制备的特征,其在电光和光电转换中得到广泛应用.本文讨论了光激发自由载流子、激子的复合和扩散动力学特性.这些动力学特性可以通过控制晶粒尺寸和晶界、抑制缺陷和界面电荷转移等多种方式进行控制.并且讨论了在电光和光电转换器件中"有效载流子"的共性和差异.在全光器件中,强的光与物质相互作用会导致非线性效应,如双光子吸收、自相位调制和光学漂白,从而实现高分辨率成像、光调制和波长转换.本综述为构建高性能光电器件提供了理论基础.

关键词： perovskites carrier exciton dynamics photo-electronic devices

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Generation of ultrafast radially polarized pulses through chirp-assisted femtosecond optical parametric amplification

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science China(Physics,Mechanics & Astronomy) 2022年第5期65卷 51-57页

作者： SaiSai Hu JieFeng Huang XinHao Ren ChangWen Xu ShiXiang Xu dianYuan Fan HaiZhe Zhong international collaborative laboratory of {3. {4. for Optoelectronic science&technology of ministry of education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China shenzhen Key laboratory of Micro-Nano Photonic Information technology College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

Radially polarized beams characterized by an axially symmetric polarization distribution can be sharply focused to produce strong longitudinal fields in the vicinity.Future applications of these beams will be facilitated by the availability of higher powers and shorter durations.Currently,the ultrafast radially polarized pulse is typically generated via wavefront reconstruction from conventional linearly polarized states.Achievable pulse duration and intensity limits are strictly dependent on extra-cavity optics.Herein,a chirp-assisted near-degenerate type-II parametric process is presented as a pulse-energy-scalable method of accessing ultrafast radially polarized pulses.In a proof-of-principle experiment,the broadband gain balance between the orthogonally polarized signal components was realized via controlling the chirp of the pump pulse.Through an analogous pulseduration transfer effect,the radially polarized signal inherited the temporal and spectral characteristics of the pump pulse and maintained the radial polarization state of each frequency component of the signal.With a shorter pump pulse,the generation of few-cycle radially polarized pulses should be achievable,which may facilitate a wide range of ultrafast applications such as vacuum electron acceleration and high-harmonic generation.

关键词： radially polarized beam optical parametric amplifier ultrafast lasers spectral broadening optical parametric phase

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