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SERS molecular-ruler based DNA aptamer single-molecule and its application to multi-level optical storage

Chemical Engineering Journal 2022年 433卷

作者： Ning Feng Lei Zhang Jingjing Shen Yanling Hu Weibing Wu Essy Kouadio Fodjo Shufen Chen Wei Huang Lianhui Wang Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China School of Electrical and Control Nanjing Polytechnic Institute 188 Xinle Road Nanjing 211500 China Jiangsu Provincial Key Lab of Pulp & Paper Science & Technology Nanjing Forestry University159 Longpan Road Nanjing 210037 China Laboratory of Constitution and Reaction of Matter University of Felix Houphouet-Boigny 22 BP 582 Abidjan 22 Cote d’Ivoire Frontiers Science Center for Flexible Electronics (FSCFE) Shaanxi Institute of Flexible Electronics (SIFE) Shaanxi Institute of Biomedical Materials and Engineering (SIBME) Northwestern Polytechnical University (NPU) 127 West Youyi Road Xi'an 710072 China

Real-time analysis of DNA aptamer conformational changes is essential to understanding the function of DNA aptamers at the single-molecular level. Herein, we design core-satellite nanostructures as surface-enhanced Raman scattering (SERS) molecular-rulers to monitor the change process of single Hg 2+ aptamer under dark-field microscopy (DFM-) correlated Raman spectroscopy. Applying the SERS molecular-ruler, the individual Hg 2+ aptamer conformational change events triggered by Hg 2+ that leads to the stepwise closing of the satellite to the core is continuously monitored by changes in SERS intensity. Moreover, individual Hg 2+ aptamer conformational change events are confirmed by in-situ scanning electron microscopy (SEM) and finite difference time-domain (FDTD) calculation. Furthermore, the SERS molecular-ruler is a valid method for studying aptamer intermediate states, the binding sites in aptamer and the kinetics of Hg 2+ aptamer configuration change at the single-molecule level. Such findings are promising for exploring the mechanism of DNA aptamer configuration change and providing the fundamental understanding for designing various DNA aptamer based biological applications. For future applications, SERS molecular-ruler has the potential to realize multi-level optical storage and presents a new practical and effective method for designing multi-level storage system.

关键词： SERS Surface-enhanced Raman scattering DFM Dark-field microscopy SEM Scanning electron microscopy FDTD Finite difference time-domain TERS Tip-enhanced Raman spectroscopy AuNP Gold nanoparticle R Relaxed T Taut PAGE Polyacrylamide gel electrophoresis LSPR Localized surface plasmon resonance ITO Indium tin oxide TEM Transmission electron microscopy 4-MBA 4-mercaptobenzoic acid EF Enhancement factor MPTES 3-mercaptopropyltriethoxysilane Tetrahedral DNA structure SERS molecular-ruler Hg 2+ aptamer conformational change Stepwise rises of Raman intensity Multi-level optical storage

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Entanglements and correlations of one-dimensional quantum spin-1/2 chain with anisotropic power-law long range interactions

arXiv

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arXiv 2020年

作者： Ren, Jie You, Wen-Long Wang, Xiaoqun Department of Physics Changshu Institute of Technology Changshu215500 China College of Science Nanjing University of Aeronautics and Astronautics Nanjing211106 China School of Physical Science and Technology Soochow University SuzhouJiangsu215006 China Key Laboratory of Artificial Structures and Quantum Control of MOE Shenyang National Laboratory for Materials Science School of Physics and Astronomy Tsung-Dao Lee Institute Shanghai Jiao Tong University Shanghai200240 China Collaborative Innovation Center for Advanced Microstructures Nanjing University Nanjing210093 China Beijing Computational Science Research Center Beijing100084 China

The correlations, entanglement entropy, and fidelity susceptibility are calculated for a one-dimensional spin-1/2 XXZ chain with anisotropic power-law long range interactions by employing the density matrix renormalization group method. In particular, this long-range interaction is assigned to ferromagnetic for transversal components, while it can be either ferro- or antiferromagnetic for the longitudinal spin component. Two ground-state phase diagrams are established versus the anisotropy of the interactions which not only changes the phase boundaries of the counterparts with short-range interactions, but also leads to the emergence of exotic phases. We found that the long-range interactions of the z-component results in a Wigner crystal phase, whereas the transversal one may break a continuous symmetry, resulting in a continuous symmetry breaking phase. Copyright © 2020, The Authors. All rights reserved.

关键词： Anisotropy

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Flexible Solar Cells: Low-Temperature-Deposited TiO2Nanopillars for Efficient and Flexible Perovskite Solar Cells (Adv. Mater. Interfaces 3/2021)

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advanced materials Interfaces 2021年第3期8卷

作者： Zhongwei Wu Peng Li Jie Zhao Ting Xiao Hong Hu Peng Sun Zehan Wu Jianhua Hao Chunlin Sun Haoli Zhang Zhifeng Huang Zijian Zheng Laboratory for Advanced Interfacial Materials and Devices Research Centre for Smart Wearable Technology Institute of Textiles and Clothing The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong SAR China School of Energy Soochow Institute for Energy and Materials Innovations & Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow University Suzhou 215006 China Department of Physics Hong Kong Baptist University Kowloon Tong Kowloon Hong Kong SAR China Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 China Department of Applied Physics The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong SAR China State Key Laboratory of Applied Organic Chemistry Key Laboratory of Special Function Materials and Structure Design College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China Institute of Advanced Materials State Key Laboratory of Environmental and Biological Analysis Golden Meditech Centre for NeuroRegeneration Sciences Hong Kong Baptist University Kowloon Tong Kowloon Hong Kong SAR China

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One-pot growth of triangular SnS nanopyramids for photoacoustic imaging and photothermal ablation of tumors

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New Journal of Chemistry 2019年第33期43卷 13256-13262页

作者： Dongliang Yang Fei Chen Shili He Haifeng Shen Yanling Hu Ning Feng Siyu Wang Lixing Weng Zhimin Luo Lianhui Wang School of Physical and Mathematical Sciences Nanjing Tech University (NanjingTech) 30 South Puzhu Road Nanjing 211816 China Key Laboratory for Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China Laboratory of Polymer Materials and Engineering Ningbo Institute of Technology Zhejiang University Ningbo 315100 China School of Electrical and Control Engineering Nanjing Polytechnic Institute No. 625 Geguan Road Nanjing City Jiangsu China College of Geography and Biological Information Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China

Recently, metal sulfides have received great attention in biomedical applications due to their fascinating properties. Herein, poly(vinylpyrollidone)-modified triangular SnS nanopyramids were synthesized via a simple one-pot hydrothermal process. The as-prepared SnS nanopyramids exhibit low toxicity, and a high extinction coefficient (14.25 L g⁻¹ cm⁻¹) and photothermal conversion efficiency (35.4%), enabling effective eradication of tumors in mice. Furthermore, photoacoustic imaging experiments suggest that SnS nanopyramids can be used for tumor photoacoustic imaging. These results indicate that SnS nanopyramids can serve as a nanoplatform for photoacoustic imaging and photothermal therapy in biomedical applications.

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Mapping the elastic properties of two-dimensional MoS_(2) via bimodal atomic force microscopy and finite element simulation

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npj Computational materials 2018年第1期4卷 246-253页

作者： Yuhao Li Chuanbin Yu Yingye Gan Peng Jiang Junxi Yu Yun Ou Dai-Feng Zou Cheng Huang Jiahong Wang Tingting Jia Qian Luo Xue-Feng Yu Huijuan Zhao Cun-Fa Gao Jiangyu Li State Key Laboratory of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics&AstronauticsNanjing 210016 JiangsuChina Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055 GuangdongChina Department of Mechanical Engineering Clemson UniversityClemsonSC 29634-0921USA Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education School of Materials Science and EngineeringXiangtan UniversityXiangtan 411105 HunanChina Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment Hunan University of Science and TechnologyXiangtan 411201 HunanChina School of Physics and Electronic Science Hunan University of Science and TechnologyXiangtan 411201 HunanChina Institute of Biomedicine and Biotechnology Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055 GuangdongChina Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen 518055 GuangdongChina Department of Mechanical Engineering University of WashingtonSeattleWA 98195USA

Elasticity is a fundamental mechanical property of two-dimensional(2D)materials,and is critical for their application as well as for strain ***,accurate measurement of the elastic modulus of 2D materials remains a challenge,and the conventional suspension method suffers from a number of *** this work,we demonstrate a method to map the in-plane Young’s modulus of mono-and bi-layer MoS_(2) on a substrate with high spatial *** atomic force microscopy is used to accurately map the effective spring constant between the microscope tip and sample,and a finite element method is developed to quantitatively account for the effect of substrate stiffness on *** these methods,the in-plane Young’s modulus of monolayer MoS_(2) can be decoupled from the substrate and determined as 265±13 GPa,broadly consistent with previous reports though with substantially smaller *** is also found that the elasticity of mono-and bi-layer MoS_(2) cannot be differentiated,which is confirmed by the first principles *** method provides a convenient,robust and accurate means to map the in-plane Young’s modulus of 2D materials on a substrate.

关键词： modulus modal element

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Layer dependence of interlayer breathing and shear modes in ising ferromagnetic CrI3

arXiv

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arXiv 2019年

作者： Guo, Kai Deng, Bowen Shi, Zhongtai Li, Yue Wang, Xin Bi, Lei Zhang, Li Lu, Haipeng Zhou, Peiheng Zhang, Linbo Cheng, Yingchun Peng, Bo National Engineering Research Center of Electromagnetic Radiation Control Materials School of Electronic Science and Engineering University of Electronic Science and Technology of China Chengdu611731 Key Laboratory of Flexible Electronics Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced Materials Nanjing Tech University Nanjing211816 Department of Physics Broida Hall University of California Santa BarbaraCA93106-9530 Key Laboratory of Multi-spectral Absorbing Materials and Structures of Ministry of Education University of Electronic Science and Technology of China Chengdu611731

Long-range magnetic orders in atomically thin Ising ferromagnetic CrI3together with their promising electronic and optical properties give rise to new fascinating physics. However, to date, there has been no experimentally comprehensive understanding of the lattice dynamics in such 2D ferromagnets. Here, we report the layer, temperature and polarization dependence of Raman features in few-layer CrI3. The out-of-plane Ag(in-plane Eg) mode shifts to a higher (lower) frequency with an increased number of layers at 10 K. These modes simultaneously blueshift to higher energies due to phonon-phonon coupling as the temperature decreases from 200 to 60 K. Remarkably, a spin-phonon coupling emerges below 60 K (∼Tc), which causes an anomalous temperature-dependent behavior for both the Ag and Eg mode. The Ag(Eg) mode maintains (reverses) the helicity of incident light at 10 K, which is independent of the magnetic field and originates from the phonon symmetry. Our work provides insights into the spin-phonon coupling and lattice dynamics of Ising ferromagnets. Copyright © 2019, The Authors. All rights reserved.

关键词： Ferromagnetism

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Frontispiece: Potential Applications of Cucurbit[n]urils and Their Derivatives in the Capture of Hazardous Chemicals

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Chemistry – A European Journal 2021年第16期27卷

作者： Dr. Xiu-Du Zhang Dr. Kai Chen Prof. Dr. Wei-Yin Sun Coordination Chemistry Institute State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical Engineering Nanjing National Laboratory of Microstructures Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210023 P.R. China College of Chemistry and Materials Science Key Laboratory of Functional Molecular Solids Ministry of Education Anhui Laboratory of Molecule-Based Materials Anhui Key Laboratory of Functional Molecular Solids Anhui Normal University 189 Jiuhua Southern Road Wuhu 241002 P.R. China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science & Technology Nanjing 210044 P.R. China

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Capping CsPbBr3 with ZnO to improve performance and stability of perovskite memristors

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Nano Research 2017年第5期10卷 1584-1594页

作者： Ye Wu Yi Wei Yong Huang Fei Cao Dejian Yu Xiaoming Li Haibo Zeng Institute ofOptoelectronics & Nanomaterials Herbert Gleiter Institute ofNanoscience Jiangsu Key Laboratory of Advanced Micro & Nano Materials and Technology College of Material Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China State Key Laboratory of Mechanics and Control of Mechanical Structures College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

The rapid development of information technology has led to an urgent need for devices with fast information storage and processing, a high density, and low energy consumption. Memristors are considered to be next-generation memory devices with all of the aforementioned advantages. Recently, organometallic halide perovskites were reported to be promising active materials for memristors, although they have poor stability and mediocre performance. Herein, we report for the first time the fabrication of stable and high-performance memristors based on inorganic halide perovskite （CsPbBr3, CPB）. The devices have electric field-induced bipolar resistive switching （ReS） and memory behaviors with a large on/off ratio （〉105）, low working voltage （〈1 V） and energy consumption, long data retention （〉104 s）, and high environmental stability, which are achieved via ZnO capping within the devices. Such a design can be adapted to various devices. Additionally, the heterojunction between the CPB and ZnO endows the devices with a light-induced ReS effect of more than 103 with a rapid response speed （〈1 ms）, which enables us to tune the resistance state by changing the light and electric field simultaneously. Such multifunctional devices achieved by the combination of information storage and processing abilities have potential applications for future computing that transcends traditional architectures.

关键词： inorganic perovskite bipolar resistive switching nonvolatile ZnO capping low power consumption

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Porous fused silica ceramics prepared by gelcasting using multigrade fused silica powders

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Journal of Alloys and Compounds 2020年 819卷

作者： Shuang Yin Lin Guo Limei Pan Shengchang Yan Handan Qiao Shiduo Zhang Jinqiong Tang Huihua Min Tai Qiu Wei Wan Jian Yang Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Nanjing Tech University Nanjing 210009 China College of Materials Science and Engineering Nanjing Tech University Nanjing 210009 China Electron Microscope Lab Nanjing Forestry University Nanjing 210037 China Hunan Engineering Laboratory for Preparation Technology of Polyvinyl Alcohol Fiber Materials Huaihua Key Laboratory for the Preparation of Ceramics Materials and Devices College of Chemistry and Materials Engineering Huaihua University Huaihua 418000 China

Porous fused silica ceramics were successfully prepared by gelcasting using N, N–dimethylacrylamide (DMAA) as gelling agent and multigrade powders as starting materials. The results suggest that the ratio of fine–grained to coarse–grained mixed powders, solid loading and sintering temperature were highly correlated with microstructure and properties of fused silica ceramics. When the ratio was 0.8 and solid loading was 80 vol%, the resulting slurries had a relatively high viscosity, which ensured the excellent homogeneity and stability of slurries, ultimately endowing fused silica ceramics desirable microstructure and properties. As sintering temperature increased from 1225 °C to 1300 °C, the bulk density (1.78–2.05 g/cm 3 ) and linear shrinkage (1.98–4.23%) were increased, but the flexural strength was only enhanced within 1275 °C with a maximum of 20.69 MPa, since excess fused silica crystallized into cristobalite at 1300 °C, which deteriorated mechanical properties.

关键词： Fused silica ceramics Multigrade powders Gelcasting DMAA Microstructure Mechanical properties

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Expert consensus on peri-implant keratinized mucosa augmentation at second-stage surgery

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International Journal of Oral Science 2025年第1期17卷 1-9页

作者： Shiwen Zhang Rui Sheng Xingmei Yang Zhen Tan Xiaoxiao Cai Quan Yuan Zhen Fan Fang Wang Zuolin Wang Ping Di Junyu Shi Hongchang Lai Duohong Zou Dehua Li Yufeng Zhang Zhuofan Chen Guoli Yang Wei Geng Lin Wang Jian Zhang Yuanding Huang Baohong Zhao Chunbo Tang Dong Wu Jiang Chen Shulan Xu Cheng Yang Yongbin Mou Jiacai He State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & West China Hospital of Stomatology Sichuan University Chengdu China Shanghai Engineering Research Center of Tooth Restoration and Regeneration & Tongji Research Institute of Stomatology & Department of implantology Shanghai Tongji Stomatological Hospital and Dental School Tongji University Shanghai China Department of Implantology & National Center for Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices Peking University School and Hospital of Stomatology Beijing China Department of Oral and Maxillofacial Implantology Shanghai Ninth People’s Hospital Shanghai Jiao Tong University School of Medicine Shanghai China Department of Oral Surgery Shanghai Ninth People’s Hospital College of Stomatology Shanghai Jiao Tong University School of Medicine Shanghai China State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration National Clinical Research Center for Oral Diseases Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture Department of Oral Implants School of Stomatology The Fourth Military Medical University Xi’an China Department of Oral Implantology University of Wuhan Wuhan China Hospital of Stomatology Guanghua School of Stomatology and Guangdong Provincial Key Laboratory of Stomatology Sun Yat-sen University Guangzhou China Stomatology Hospital School of Stomatology Zhejiang University School of Medicine Zhejiang Provincial Clinical Research Center for Oral Diseases Key Laboratory of Oral Biomedical Research of Zhejiang Province Cancer Center of Zhejiang University Engineering Research Center of Oral Biomaterials and Devices of Zhejiang Province Hangzhou China Department of Dental Implant Center Beijing Stomatological Hospital School of Stomatology Capital Medical University Beijing China Departm

Peri-implant keratinized mucosa (PIKM) augmentation refers to surgical procedures aimed at increasing the width of PIKM. Consensus reports emphasize the necessity of maintaining a minimum width of PIKM to ensure long-term peri-implant health. Currently, several surgical techniques have been validated for their effectiveness in increasing PIKM. However, the selection and application of PIKM augmentation methods may present challenges for dental practitioners due to heterogeneity in surgical techniques, variations in clinical scenarios, and anatomical differences. Therefore, clear guidelines and considerations for PIKM augmentation are needed. This expert consensus focuses on the commonly employed surgical techniques for PIKM augmentation and the factors influencing their selection at second-stage surgery. It aims to establish a standardized framework for assessing, planning, and executing PIKM augmentation procedures, with the goal of offering evidence-based guidance to enhance the predictability and success of PIKM augmentation.

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