检索结果-南通市图书馆

Chinese Chemical Letters 2019年第12期30卷 2009-2012页

作者： Ci Huang Feifei Lu Ke Xu Guanjun Ding Lijun You Jiabin Wang Qiqing Zhang Institute of Biomedical and Pharmaceutical Technology College of Chemistry Fuzhou University

Magnetic polyphosphazene(MPZS) particles coated by Ag nanoparticles(MPZS-Ag) have been developed as surface enhanced raman spectroscopy(SERS) substrates for sensitive detection of melamine in aqueous solutions and milk samples.5,5’-Dithiobis-(2-nitrobenzoic acid)(DTNB) was used as model analyte to test the SERS activity of the MPZS-Ag particles.The prepared MPZS-Ag particles possess both magnetic responsiveness and excellent SERS properties.SERS detection of different concentrations of melamine aqueous solutions and spiked milk samples were performed by the MPZS-Ag particles.The limit of detection(LOD) of the melamine in aqueous solutions was 10^-7 mol/L(0.0126 mg/L) and 0.6 mg/L in real milk samples using the MPZS-Ag particles as SERS substrates.The LOD of the melamine are much lower than the safety values of Food and Drug Administration and Codex Alimentarius Commission.These results indicate that the MPZS-Ag particles have promising application prospect for SERS analysis in food safety fields.

关键词： Polyphosphazene Magnetic polymer particles surface enhanced raman spectroscopy Ag nanoparticles Melamine detection

Detection of pesticides on navel orange skin by surface-enhanced raman spectroscopy coupled with Ag nanostructures

在线全文

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2016年第2期9卷 179-185页

作者： Liu Yande Zhang Yuxiang Wang Haiyang Ye Bing Institute of Optics-Mechanics-Electronics Technology and Application East China Jiaotong UniversityNanchang 330013China

Residual pesticides such as phosmet and chlorpyrifos in fruit have become a public concern problem in recent years.In this study,surface-enhanced raman spectroscopy(SERS)was used to detect and characterize pesticides extracted from navel orange surfaces.Silver colloid was prepared for getting the SERS of phosmet and chlorpyrifos.enhanced raman signals of phosmet over a concentration range of 5 mg/L to 30 mg/L and chlorpyrifos over a concentration range of 5 mg/L to 20 mg/L were acquired.Partial least squares(PLS)regression combined with different data preprocessing methods was used to develop quantitative models.With the second derivative data preprocessing,the best prediction model of phosmet pesticide was achieved with a correlation coefficient(r)of 0.852 and the root mean square error of prediction(RMSEP)of 5.177 mg/L.The best prediction model of chlorpyrifos pesticide was achieved with r of 0.843 and the RMSEP of 2.992 mg/L using the multiplicative scatter correction(MSC)and first derivative data preprocessing.This study indicated that SERS coupled with Ag nanostructures is a potential tool for analysis of phosmet and chlorpyrifos pesticide residues.

关键词： pesticides residues detection silver colloid surface enhanced raman spectroscopy navel orange food safety

A Simple and Highly Sensitive Thymine Sensor for Mercury Ion Detection Based on surface enhanced raman spectroscopy and the Mechanism Study

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

A Simple and Highly Sensitive Thymine Sensor for Mercury Ion...

The Fabrication and SERS Performance of Multi-layer Hollow Au-Ag Alloy Nano Urchins Structure-based SERS Fiber Probe

第十九届全国光散射学术会议

作者： Hao Yang Sui-Bo Ye Weihong Zhang Fangyan Xie Li Gong Ping-Ping Fang Jian Chen Yexiang Tong Instrumental Analysis and Research Centre MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province KLGHEI of Environment and Energy Chemistry School of Chemistry Sun Yat-Sen University

Mercury ions(Hg)is recognized as one of the toxic metal ion for the environment and for human health.[1-2]Techniques utilized in the detection of Hg is an important factor.Herein,a simple thymine was successfully

关键词： Mercury detection surface enhanced raman spectroscopy sensor thymine gold nanorod

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2023年第2期38卷 274-279页

作者： HAO Zhenbang TIAN Qihang CAO Shiyi HAN Xiaoyu ZHANG Jihong XIE Jun ZHAO Xiujian State Key Laboratory of Silicate Materials for Architectures(Wuhan University of Technology) Wuhan430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan430070China Hainan Research Institute of Wuhan University of Technology Sanya572100China

Novel hollow Au Ag alloy nano urchins were synthesized via Ag seeds growth method,and self-assembly coated on the wall and end-tip of silica fiber for fiber probe fabrication.The nano urchins homogeneously distributed on fiber surface because of fiber silanization.The sizes and tip sharpness of the nano-urchins could be controlled by Ag seeds.The elements distribution analysis indicated there was high Ag content in tip-top for better surface enhance raman scattering performance.The detectable concentration could be as low as 10-8 M using crystal violet molecules as analyte.Moreover,the fiber probes were stable in air,due to Au in the alloy.This fiber probe could be used for low content single molecular analysis.

关键词： surface enhanced raman spectroscopy hollow Au-Ag alloy nano urchins fiber probe

2D profiling of tumor chemotactic and molecular phenotype at single cell resolution using a SERS-microfluidic chip

在线全文

学校读者我要写书评

暂无评论

Nano Research 2022年第5期15卷 4357-4365页

作者： Yizhi Zhang Lei Wu Kuo Yang Shenfei Zong Zhuyuan Wang Yiping Cui Advanced Photonics Center School of Electronic Science and EngineeringSoutheast UniversityNanjing 210096China Department of Biomedical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China

Emerging single-cell technologies create new opportunities for unraveling tumor heterogeneity.However,the development of high-content phenotyping platform is still at its infancy.Here,we develop a microfluidic chip for two-dimensional(2D)profiling of tumor chemotactic and molecular features at single cell resolution.Individual cells were captured by the triangular micropillar arrays in the cell-loading channel,facilitating downstream single-cell analysis.For 2D phenotyping,the chemotactic properties of tumor cells were visualized through cellular migratory behavior in microchannels,while their protein expression was profiled with multiplex surface enhanced raman scattering(SERS)nanovectors,in which raman reporter-embedded gold@silver core-shell nanoparticles(Au@Ag REPs)were modified with DNA aptamers targeting cellular surface proteins.As a proof of concept,breast cancer cells with diverse phenotypes were tested on the chip,demonstrating the capability of this platform for simultaneous chemotactic and molecular analysis.The chip is expected to provide a powerful tool for investigating tumor heterogeneity and promoting clinical precision medicine.

关键词： gold@silver nanoparticles surface enhanced raman spectroscopy microfluidic chip single cell analysis two-dimensional(2D)phenotype profiling

Molecular-level investigation on electrochemical interfaces by raman spectroscopy

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

Chinese Journal of Chemistry 2000年第2期18卷 135-146页

作者：田中群任斌 State Key Laboratory for Physical Chemistry of Solid surfaces Department of Chemistry Institute of Physical Chemistry Xiamen University Xiamen Fujian 361005 China

The structure and dynamics of electrode/liquid interfaces play an increasingly important role in electrochemistry. raman spectroscopy is capable of providing detailed structural information at molecular level and new insight into the interfacial structure, adsorption, reaction, electrocatalysis and corrosion. In this account we will summarize some progresses of surface raman spectroscopy in the study of electrochemical interfaces, mainly based on our group's work, laying emphasis on the detection sensitivity, spectral resolution, time resolution and spatial resolution as well as the hyphenated technique.

关键词： raman spectroscopy surface enhanced raman spectroscopy electrochemical interfaces adsorption

The origin of potential rise during charging of Li-O2 batteries

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2017年第12期60卷 1527-1532页

作者： Limin Guo Jiawei Wang Shunchao Ma Yantao Zhang Erkang Wang Zhangquan Peng State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangehun 130022China University of Chinese Academy of Sciences Beijing 100039China

When aprotic Li-O_2 batteries recharge, the solid Li_2O_2 in the positive electrode is oxidized, which often exhibits a continuous or step increase in the charging potential as a function of the charging capacity, and its origin remains incompletely understood.Here, we report a model study of electro-oxidation of a Li_2O_2 film on an Au electrode using voltammetry coupled with in situ raman spectroscopy. It was found that the charging reaction initializes at the positive electrode|Li_2O_2 interface, instead of the previously presumed Li_2O_2 surface, and consists of two temporally and spatially separated Li_2O_2 oxidation processes, accounting for the potential rise during charging of Li-O_2 batteries. Moreover, the electrode surface-initialized oxidation can disintegrate the Li_2O_2 film resulting in a loss of Li_2O_2 into electrolyte solution, which drastically decreases the charging efficiency and highlights the importance of using soluble electro-catalyst for the complete charging of Li-O_2 batteries.

关键词： aprotic Li-O2 battery reactive site oxygen evolution reaction surface enhanced raman spectroscopy oxygen electrochemistry

A New SERS Method Based on Shell-isolated Nanoparticles for Rapidly Quantitative Determination of Hydrogen Peroxide

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2021年第12期40卷 1604-1610,1552页

作者：温宝英申泰龙吴元菲李剑锋 Department of Physics State Key Laboratory of Physical Chemistry of Solid SurfacesCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Hydrogen peroxide(H_(2)O_(2))is an important chemical substance produced in the metabolic process of organisms.Excess or less production could lead to serious effects on the body.Therefore,the development of advanced technology to accurately detect the content of H_(2)O_(2) is of great significance.Herein,we developed a new ratiometric SERS nanoprobe based on shell-isolated nanoparticles(SHINs)for rapidly quantitative detection of H_(2)O_(2)-Because of the small raman cross-section of H_(2)O_(2),the ratiometric nanoprobe is an effective method for indirect detection of H_(2)O_(2),which is designed based on the reaction of p-mercaptophenylboric acid(MPB)with H_(2)O_(2) to form p-mercaptophenol(MP).Meanwhile,the nanoprobe was used to achieve quantitative detection of H_(2)O_(2) and applied in quantitative detection of actual sample-glucose,whose linear correlation coefficient could reach 0.9947 and 0.9812,respectively.This method expands the application of SERS technology,especially provides a reference for the detection of molecules with small raman cross-section.

关键词： hydrogen peroxide surface enhanced raman spectroscopy shell-isolated nanoparticles ratiometric glucose