检索结果-南通市图书馆

surface-enhanced Raman scattering on nanodiamond-derived carbon onions

Nanotechnology and Precision Engineering 2019年第1期2卷 35-39页

作者： Ying Song Zongwei Xu Andreas Rosenkranz Mathias Rommel Changkun Shi Fengzhou Fang State Key Laboratory of Precision Measuring Technology & Instruments Centre of MicroNano Manufacturing Technology Tianjin University Department of Chemical Engineering Biotechnology and Materials Universidad de Chile Fraunhofer Institute for Integrated Systems and Device Technology (IISB)

Annealing nanodiamonds(ND) at high temperatures up to 1700 ℃ is a common method to synthesize carbon onions. The transformation from NDs to carbon onions is particularly interesting because of carbon onions' potential in the field of tribology and their application in ultra-charge/discharge devices. In this paper, a novel surface-enhanced Raman scattering technique that involves coating the sample with nanoscopic gold particles is proposed to characterize the NDs after different annealing treatments. Conventional Raman and surfaceenhanced Raman spectra were obtained, and the changes of peak parameters as the function of annealing temperature were evaluated. It was found that the widths of the D and the G peaks decreased with increasing annealing temperature, reflecting an improved order in the sp^2-hybridized carbon during the transformation from NDs to carbon onions. After annealing at 1700 ℃, the sp^2?carbon was highly ordered, indicating desirable electrical conductivity and lubricity. With increasing annealing temperature, the D peak showed a blue shift of almost30 cm^(-1), while the G peak merely shifted by 5 cm^(-1). For annealing temperatures above 1100 ℃, an increase of intensity ratio ID/IGwas observed. Compared to the uncoated area, red shifts of 0.5-2 cm^(-1) and of 5-9 cm^(-1) for the G and D peaks, respectively, were detected for the gold-coated area, which was due to the coupling of the plasmons and the phonons of the samples.

关键词： Nanodiamonds Carbon onions surface-enhanced Raman scattering LOPC mode

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

surface-enhanced Raman Scattering of Aggregated 2, 2'-Cyanine Adsorbed on Silver Colloid

引用

Chinese Science Bulletin 1993年第9期38卷 723-726页

作者：潘多海郇宜贤傅克德张鹏翔 Department of Physics Shaanxi Normal UniversityXi'an 710062PRC Institute of Physics Academia SinicaBeijing 100080PRC

1 Introduction To our knowledge, cyanine dyes have been widely used as photographic sensitizers and biological fluorescence probes. Recently, the investigation of the optical and nonlinear optical properties of aggregates has attracted considerable attention, because of possible applications of these materials to the field of optical communication and computing. Many studies on the optical dynamics of aggregated cyanine dyes were re-

关键词： aggregate surface-enhanced Raman scattering overtone and combination vibrations

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Sensitive and Label-Free Detection of Protein Secondary Structure by Amide Ⅲ Spectral Signals using surface-enhanced Raman Spectroscopy

引用

Chinese Journal of Chemical Physics 2019年第5期32卷 603-610页

作者： Kang-zhen Tian Chang-chun Cao Xin-ming Nie Wen Wang Cai-qin Han Jiangsu Key Laboratory of Advanced Laser Materials and Devices School of Physics and Electronic Engineering Jiangsu Normal University Xuzhou 221116 China The 95979 Army of Chinese People's Liberation Army Taian 271200 China

Proteins and peptides perform a vital role in living systems, however it remains a challenge for accurate description of proteins at the molecular level. Despite that surface-enhanced Raman spectroscopy (SERS) can provide the intrinsic fingerprint information of samples with ultrahigh sensitivity, it suffers from the poor reproducibility and reliability. Herein, we demonstrate that the silver nanorod array fabricated by an oblique angle deposition method is a powerful substrate for SERS to probe the protein secondary structures without exogenous labels. With this method, the SERS signals of two typical proteins (lysozyme and cytochrome c) are successfully obtained. Additionally, by analyzing the spectral signals of the amide Ⅲ of protein backbone, the influence of concentration on the folding status of proteins has been elucidated. With the concentration increasing, the components of α-helix and β-sheet structures of lysozyme increase while the secondary structures of cytochrome c almost keep constant. The SERS method in this work offers an effective optical marker to characterize the structures of proteins.

关键词： surface-enhanced Raman spectroscopy Silver nanorod Protein secondary structures

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Applications of magnetic nanoparticles in surface-enhanced Raman scattering(SERS)detection of environmental pollutants

引用

Journal of Environmental Sciences 2019年第6期31卷 14-34页

作者： Dan Song Rong Yang Feng Long Anna Zhu School of Environment and Natural Resources Renmin University of China Research Institute of Chemical Defense Academy of Military Sciences PLA China State Key Laboratory of NBC Protection FOR Civilian

Environmental pollution, a major problem worldwide, poses considerable threat to human health and ecological environment. Efficient and reliable detection technologies, which focus on the appearance of emerging environmental and trace pollutants, are urgently needed. surface-enhanced Raman scattering(SERS) has become an attractive analytical tool for sensing trace targets in environmental field because of its inherent molecular fingerprint specificity and high sensitivity. In this review, we focused on the recent developments in the integration of magnetic nanoparticles(MNPs) with SERS for facilitating sensitive detection of environmental pollutants. An overview and classification of different types of MNPs for SERS detection were initially provided, enabling us to categorize the huge amount of literature that was available in the interdisciplinary research field of MNPs based SERS technology. Then, the basic working principles and applications of MNPs in SERS detection were presented. Subsequently, the detection technologies integrating MNPs with SERS that eventually were used for the detection of various environmental pollutions were reviewed. Finally, the advantages of MNP-basedSERS detection technology for environmental pollutants were concluded, and the current challenges and future outlook of this technology in practical applications were highlighted. The application of the MNPsbasedSERS techniques for environmental analysis will be significantly advanced with the great progresses of the nanotechnologies, optics, and materials.

关键词： Magnetic nanoparticles surface-enhanced Raman scattering SERS substrates Environmental pollutant detection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mesoporous Ag nanocubes synthesized via selectively oxidative etching at room temperature for surface- enhanced Raman spectroscopy

引用

Nano Research 2015年第7期8卷 2351-2362页

作者： Lin Gan Meijia Yang Xi Ke Guofeng Cui Xudong Chen Shiva Gupta William Kellogg Drew Higgins Gang Wu Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education of China Sun Yat-sen University Guangzhou 510275 China Electronic Packaging Electrochemistry Laboratory School of Chemistry and Chemical Engineering Sun Yat-sen University Guangzhou 510275 China Department of Chemical and Biological Engineering University at Buffalo The State University of New York Buffalo New York 14260 USA Department of Chemical Engineering University of Waterloo Waterloo Ontario N2L 36 I Canada

Silver nanocubes enriched with {100} facets have been extensively used for surface-enhanced Raman scattering. Herein, we report a new water-phase synthesis method for weU-defined Ag nanocubes with tunable sizes via a two-step procedure at room temperature. First, irregularly shaped Ag nanoparticles （INPs） were prepared by reducing silver ammonia solution using ethylal. Second, the agglomerated INPs were selectively etched with HNO3 and C1- to yield {100} facet-rich mesoporous Ag nanocubes. The mechanism of Ag-nanocube formation and growth was investigated in detail by elucidating the involved chemical reactions and physical changes at each step during the synthesis. The addition of C1- anions was responsible for facilitating Ag nanoparticle growth by removing surface-adsorbed Ag＋ species, thereby eliminating inter-particle repulsive forces. This agglomeration was found crucial for the subsequent selective oxidation of Ag nanoparticles because the protective agent used, polyvinylpyrrolidone （PVP）, was the most effective one for adsorption on the surfaces of Ag nanoparticles of size greater than approximately 50 nm. Importantly mesopores were found inside the Ag nanocubes; this can be attributed to the unavoidable imperfect packing during the agglomeration of INPs. The newly prepared Ag nanocubes were further used to enhance the Raman signal of rhodamine 6G, which is capable of reducing the detection limitation to 10-16 mol·L-1.

关键词： Ag nanocube,selective etching water phase synthesis room tempersture surface-enhanced raman scattering(sers)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Laser irradiation induced spectral evolution of the surface-enhanced Raman scattering(SERS) of 4-tert-butylbenzylmercaptan on gold nanoparticles assembly

引用

Science China Chemistry 2007年第4期50卷 520-525页

作者： TONG LianMing ZHU Tao LIU ZhongFan Center for Nanoscale Science and Technology College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

The spectral evolution of the surface-enhanced Raman scattering (SERS) of 4-tert-butylbenzylmer-captan (4-tBBM) on gold nanoparticles assembly under laser irradiation is reported. The relative intensities of typical peaks in the spectrum of 4-tBBM gradually change with irradiation time. Comparison of the rate of spectral changes under several experimental conditions indicates that the surface plasmon resonance (SPR) induced heat in the gold nanoparticles assembly is the origin of the spectral evolution. During the process of self-assembly, 4-tBBM molecules do not form a compact ordered monolayer because of the spatial hindrance of the 4-tert-butyl end group. The heat induced by laser irradiation drives the 4-tBBM molecules to rearrange to a more stable orientation.

关键词： surface-enhanced Raman scattering(SERS) spectral evolution surface plasmon resonance(SRP) thermal effect

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Core(Au)-shell(Ag)structure nitrogen dots for the recognition of nitroaniline isomers by surface-enhanced Raman scattering

引用

Chinese Chemical Letters 2019年第3期30卷 638-642页

作者： Jiani Yang Ling Xia Zhenhua Lin Zhijiao Tang Gongke Li Yuling Hu School of Chemistry Sun Yat-sen University

In this work, we report a facile synthesis method for NDs-Au@AgNPs surface-enhanced Raman scattering(SERS) substrate using Au seeds prepared by nitrogen-rich quantum dots(NDs). As a new member of quantum-dots family, NDs are rich in nitrogen and oxygen-containing functional groups and therefore can be used as an efficient reducing and stabilizing agent for the synthesis of AuNPs. The NDs-Au@AgNPs with core-shell structures was synthesized by seed-mediated growth method in presence of NDs-AuNPs seeds and exhibited high SERS activity with a high SERS enhancement factor of 10~7. The NDs-Au@AgNPs SERS substrate was effectively used for the recognition and detection of isomers of meta, ortho and para nitroanilines, while commercial SERS substrate cannot. In addition, the possible adsorption behavior was further studied, which is of great significance for the related work about differentiation of isomers and the mechanism of SERS enhancement.

关键词： Nitrogen-rich quantum dots NDs-Au@AgNPs Nitroaniline isomers surface-enhanced Raman scattering Adsorption behavior

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Immunoassay utilizing biochemistry reaction product via surface-enhanced Raman scattering in near field

引用

中国科学：化学英文版 2005年第3期48卷 240-245页

作者： ZHAO Haiying1, NI Yi1, JIANG Wei1, LUO Peiqing1, HUANG Meizheng1, YIN Guangzhong2 & DOU Xiaoming1 1. Institute of Optics Engineering, Shanghai Jiaotong University, Shanghai 200030, China 2. Suzhou No. 2 People’s Hospital, Suzhou 215000, China Institute of Optics Engineering Shanghai Jiaotong University Shanghai China Suzhou No. 2 People’s Hospital Suzhou China

We propose here a kind of applications of surface-enhanced Raman scattering (SERS) to immunology. It is a new enzyme immunoassay based on SERS. In the proposed system, antibody immobilized on a solid substrate reacts with antigen, which binds with another antibody labeled with peroxidase. If this immunocomplex is subjected to reaction with o-phenylenediamine and hydrogenperoxide, azoaniline is generated. This azo compound is ad-sorbed on a silver colloid and only the azo compound gives a strong surface-enhanced reso-nance Raman (SERRS) spectrum. A linear relationship was observed between the peak intensity of the N=N stretching band and the concentration of antigen, revealing that one can determine the concentration of antigen by the SERRS measurement of the reaction product. The detection limit of this SERS enzyme immunoassay method was found to be about 10?15 mol/L.

关键词： surface-enhanced Raman scattering, SERS, near field, immunoassay, metal colloid.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hexagonally arranged arrays of urchin-like Ag hemispheres decorated with Ag nanoparticles for surface-enhanced Raman scattering substrates

引用

Nano Research 2015年第7期8卷 2261-2270页

作者： Haibin Tang Guowen Meng Zhongbo Li Chuhong Zhu Zhulin Huang Zhaoming Wang Fadi Li Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State Physics Chinese Academy of Sciences P. O. Box 1129 Hefei 230031 China University of Science and Technology of China Hefei 230026 China

The surface topography of noble metal particles is a significant factor in tailoring surface-enhanced Raman scattering （SERS） properties. Here, we present a simple fabrication route to hexagonally arranged arrays of surface-roughened urchin- like Ag hemispheres （Ag-HSs） decorated with Ag nanoparticles （Ag-NPs） for highly active and reproducible SERS substrates. The urchin-like Ag-HS arrays are achieved by sputtering Ag onto the top surface of a highly ordered porous anodic aluminum oxide （AAO） template to form ordered arrays of smooth Ag-HSs and then by electrodepositing Ag-NPs onto the surface of each Ag-HS. Owing to the ordered arrangement of the Ag-HSs and the improved surface roughness, the urchin-like hierarchical Ag-HS arrays can provide sufficient and uniform ＂hot spots＂ for reproducible and highly active SERS effects. Using the urchin-like Ag-HS arrays as SERS substrates, 10-7 M dibutyl phthalate （a member of plasticizers family） and 1.5 × 10-5 M PCB-77 （one congener of polychlorinated biphenyl, a notorious class of pollutants） are identified, showing promising potential for these substrates in the rapid recognition of organic pollutants.

关键词： Ag-hemisphere urchin-like surface roughness polychlorinated biphenyls (pcbs) surface-enhanced Raman scatteringsurface-enhanced Raman sers

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

One-pot synthesis of silver colloid with body-heat for surface-enhanced Raman spectroscopy detections

引用

Chinese Chemical Letters 2019年第5期30卷 1027-1030页

作者： Wanchao Chen Yan Kang Han Zhang Tianxiong Huang Xin Tao Aiping Lu Yiping Du Shanghai Key Laboratory of Functional Materials Chemistry School of Chemistry&Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Department of Quality Assurance Jiangsu Yangnong Chemical Group Co.Ltd.Yangzhou 225009China

In this study,a convenient method of preparing the substrate is proposed with one-pot synthesis of silver colloid under body heat,and the SERS detection uses the fresh substrate to avoid the drawback of substrates’short life of *** synthesis of silver colloid is carried out in a 10 mL vial by using ascorbic acid as a reductant and trisodium citrate as a *** vial is grasped with the palm of the experimenter for several minutes without *** proposed method is simple,rapid,green energy and *** adjusting the concentration of trisodium citrate,not only the particle size can be controlled from about 110 nm to 50 nm but also the homogeneity of nanoparticles can be *** a SERS substrate,the silver colloid has high batch reproducibility and showed good SERS *** relative standard deviation between different manufacturers is 5.51%when the substrate of silver colloid is used for the detection of rhodamine 6 *** the substrate,the lowest detection concentrations of rhodamine 6 G,crystal violet,enrofloxacin,melamine and leucomalachite green are 1.0×10-8,6.1×10-8,1.4×10-6,7.1×10-5 and 5.1×10-8 mol/L,*** demonstrate that the developed method has the advantage of convenience and high efficiency in the field preparation of reliable SERS substrate.

关键词： One-pot synthesis Silver colloid Substrate surface-enhanced Raman spectroscopy (SERS)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：