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A thermo-responsive rewritable plasmonic bio-memory by regulating single core-satellite gold nanocluster dissociation

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Nano Research 2024年第8期17卷 7275-7282页

作者： Wen Zhang Yi Wang Yamin Wang Xiaomei Lu Weibing Wu Quli Fan Lei Zhang State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&TelecommunicationsNanjing 210023China Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources College of Light Industry and Food EngineeringNanjing Forestry UniversityNanjing 210037China Zhengzhou Institute of Biomedical Engineering and Technology Zhengzhou 450001China Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)&School of Flexible Electronics(Future Technologies)Nanjing Tech University(Nanjing Tech)Nanjing 211816China

A thermo-responsive rewritable plasmonic bio-memory chip has been successfully fabricated on an indium tin oxide(ITO)glass slide by assembling core-satellite gold nanoclusters with different size of gold nanoparticles(AuNPs)using double-strand DNA(dsDNA)*** the prepared 70@DNA20@13 gold nanoclusters(AuNCs)exhibited more stable and greater photothermal conversion *** short time irradiation by 633 nm microbeam laser,every individual AuNCs could be excited and remove the satellite AuNPs on its ***,in the dissociation process of AuNCs with 3−5 satellite,its color would change from yellow to green,which showed more significant reduction in the red channel of the dark-field microscopy(DFM)images and could be defined to state“0”and“1”***,this plasmonic nano bio-memory could transform cyclically its state between 0 and 1 which exhibited excellent rewritable ability.

关键词： plasmonic assembly thermal-responsive single nanoparticle rewritable bio-memory

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Wide-field optical sizing of single nanoparticles with 10 nm accuracy

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Science China(Physics,Mechanics & Astronomy) 2021年第9期64卷 56-66页

作者： Yang Liu Yan Kuai Qiwen Zhan Joseph R.Lakowicz Douguo Zhang Advanced Laser Technology Laboratory of Anhui Province Department of Optics and Optical EngineeringUniversity of Science and Technology of ChinaHefei 230026China School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China Center for Fluorescence Spectroscopy Department of Biochemistry and Molecular BiologyUniversity of Maryland School of MedicineBaltimore 21201USA

There is an increasing demand for new technologies to rapidly measure individual nanoparticles in situ for applications,including early-stage diagnosis of human diseases and environmental ***,we demonstrate a label-free wide-field optical microscopy capable of sizing dispersed non-luminescent dielectric nanoparticles(with diameters down to 22 nm)with 10 nm *** technique utilizes enhanced nanoparticle-perturbed scattering by surface plasmons created on a gold *** the meantime,an azimuthal rotation illumination module is installed on this microscope and a differential image processing technique is carried *** relationship between the scattering intensity and the particle size was experimentally measured with good consistency with the theoretical *** capability of precise measurement of the size of dispersed nanoparticles within a larger field of view in a label-free,non-invasive and quantitative manner may find broad applications involving single nanoparticle chemistry and physics.

关键词： plasmonic microscopy label-free imaging single nanoparticle optical sizing imaging and sensing

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Controlling plasmon‐exciton interactions through photothermal reshaping

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Opto-Electronic Advances 2020年第1期3卷 8-15页

作者： Aiqin Hu Shuai Liu Jingyi Zhao Te Wen Weidong Zhang Qihuang Gong Yongqiang Meng Yu Ye Guowei Lu State Key Laboratory for Mesoscopic Physics Collaborative Innovation Center of Quantum MatterNano-optoelectronics Frontier Center of the Ministry of EducationSchool of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuanShanxi 030006China School of Materials Science and Engineering Hebei University of Science and TechnologyShijiazhuang 050018China

We investigated the plasmon-exciton interactions in an individual gold nanorod(GNR)with monolayer MoS2 at room temperature with the single-particle spectroscopy *** control the plasmon-exciton interaction,we tuned the local surface plasmon resonance of an individual GNR in-situ by employing the photothermal reshaping *** scattering spectra of the GNR-MoS2 hybrids exhibited two dips at the frequencies of the A and B excitons of monolayer MoS2,which were caused by the plasmon-induced resonance energy transfer *** resonance energy transfer rate increased when the surface plasmon resonance of the nanorod matched well with the exciton transition ***,we demonstrated that the plasmon-enhanced fluorescence process dominated the photoluminescence of the GNR-MoS2 *** results provide a flexible way to control the plasmon-exciton interaction in an all-solid-state operating system at room temperature.

关键词： gold nanorod MoS2 hybrid scattering photoluminescence single nanoparticle

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Evolution of single nanobubbles through multi-state dynamics

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Chinese Chemical Letters 2020年第9期31卷 2442-2446页

作者： Huihui Wang Ting He Ying Du Wenhui Wang Yangbin Shen Shuping Li Xiaochun Zhou Feng Yang School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China Suzhou Institute of Nano-tech and Nano-bionics Chinese Academy of Sciences(CAS).Suzhou 215123China Institute of Materials Science and Devices Suzhou University of Science and Technology.Suzhou 215009China Center for Integrated Nanotechnologies Los Alamos National LaboratoryLos AlamosNM 87544United States

Nanobubble is a rising research field,which attracts more and more attentions due to its potential applications in medical science,catalysis,electrochemistry and *** better implement these applications,it is urgent to understand one of the most important mechanisms of nanobubbles,the ***,few attentions have been paid in this aspect because of the methodology *** we successfully used dark-field microscopy to study the evolution process of single nanobubbles generated from formic acid dehydrogenation on single Pd-Ag *** found some of the nanobubbles in this system can exhibit three distinct states representing different sizes,which can transform among each *** transitions are not direct but through some intermediate *** kinetic analysis reveals complicated mechanisms behind the evolution of single *** results acquired from this study can be applicable to nanobubble systems in general and provide insights into the understanding of mechanisms affecting the stability of nanobubbles and their applications.

关键词： Nanobubble single nanoparticle Catalysis Dark-field microscopy Intermediate state

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Optical Nanoimpacts of Dielectric and Metallic nanoparticles on Gold Surface by Reflectance Microscopy: Adsorption or Bouncing?

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Journal of Analysis and Testing 2019年第2期3卷 175-188页

作者： Jean-François Lemineur Talia Jane Stockmann Jérôme Médard Claire Smadja Catherine Combellas Frédéric Kanoufi UniversitéSorbonne Paris Cité UniversitéParis DiderotITODYSCNRS UMR 708615 rue J.A.de Baïf75013 ParisFrance Present Address:Memorial University of Newfoundland Chemistry Department283 Prince Philip Dr.St.John’sNL A1B 3X7Canada Faculty of Pharmacy University Paris-SudCNRS UMR 86125 rue J.B.Clément92296 Châtenay-MalabryFrance

Optical modeling coupled to experiments show that a microscope operating in reflection mode allows imaging,through solutions or even a microfluidic cover,various kinds of nanoparticles,NPs,over a(reflecting)sensing surface,here a gold(Au)*** modeling suggests that this configuration enables the interferometric imaging of single NPs which can be characterized individually from local change in the surface *** interferometric detection improves the optical limit of detection compared to classical configurations exploiting only the light scattered by the *** method is then tested experimentally,to monitor in situ and in real time,the collision of single Brownian NPs,or optical nanoimpacts,with an Au-sensing ***,mimicking a microfluidic biosensor platform,the capture of 300 nm FeOx maghemite NPs from a convective flow by a surface-functionalized Au surface is dynamically ***,the adsorption or bouncing of individual dielectric(100 nm polystyrene)or metallic(40 and 60 nm silver)NPs is observed directly through the *** influence of the electrolyte on the ability of NPs to repetitively bounce or irreversibly adsorb onto the Au surface is *** such visualization mode of single-NP optical nanoimpacts is insightful for comprehending single-NP electrochemical studies relying on NP collision on an electrode(electrochemical nanoimpacts).

关键词： Reflection microscopy single nanoparticle Sensor Adsorption Silver Polystyrene

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