Article
Chemistry, Physical
Wang-You Zeng, Zhuo-Fu Wang, Ding-Zheng Lin, I-Chung Cheng
Summary: In this study, nanoporous silver films with different pore sizes were synthesized and their structures and properties were investigated. The results demonstrated that smaller nanopores had higher hot spot areas and surface electric fields, which played an important role in enhancing Raman intensity and chemical detection sensitivity.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Juan Li, Wanling Li, Yan Rao, Feng Shi, Suhua Yu, Huizhen Yang, Lingfeng Min, Zhanjun Yang
Summary: Highly ordered AgNPs-coated silica photonic crystal beads (Ag/SPCBs) were prepared and characterized as a novel SERS substrate. The impact of silica nanoparticle size and AgNO3 concentration on the SERS performance of Ag/SPCBs substrate was investigated. Using malachite green as a model analyte, Ag/SPCBs substrate showed high sensitivity and wide linear range.
CHINESE CHEMICAL LETTERS
(2021)
Article
Chemistry, Physical
Puran Pandey, Siela Vongphachanh, Jongwon Yoon, Bokyoung Kim, Chel-Jong Choi, Jung Inn Sohn, Woong-Ki Hong
Summary: This study demonstrated the use of AgNWNF-coated stretchable PDMS substrates as SERS sensors with strong effects. The adhesion strength of AgNWNEs on UVO-treated PDMS substrates was significantly stronger than that of AgNWNFs on untreated PDMS.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Qian Zhang, Zhenglin Liu, Lingfeng Duan, Zijin Cao, Bin Wu, Lulu Qu, Caiqin Han
Summary: Lipid soluble antioxidants can effectively prevent the oxidative deterioration of oils and fat-containing foods. However, the long-term consumption of foods with antioxidants may be harmful to human health. In this study, a highly sensitive surface-enhanced Raman scattering (SERS) method was developed using multi-hot silver nano-tripod (AgNT) substrates for the rapid detection of antioxidants. The AgNT substrates showed excellent detection ability due to the widely distributed hot spots. The method was successfully applied for the rapid detection and identification of common antioxidants in food, providing a portable means for food safety control.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Analytical
W. Cheuquepan, S. Hernandez, M. Perez-Estebanez, L. Romay, A. Heras, A. Colina
Summary: Electrochemistry can be used to generate SERS substrates, utilizing the plasmonic properties of nanos-tructures and the chemical mechanism, with time-resolved Raman spectroelectrochemistry providing valuable information. Comparing Au and Ag metals for folic acid detection in drugs, it was found that Ag SERS substrates outperformed Au SERS substrates in complex samples.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Haining Li, Bing Yang, Biao Yu, Nan Huang, Lusheng Liu, Jiaqi Lu, Xin Jiang
Summary: Treatment of hydrogen plasma on silicon nanowires, followed by coatings of nanocrystalline diamond and multilayer graphene, enables enhanced Raman signals with reduced fluorescent background. The graphene-coated nanowires show lower fluorescent background than diamond-coated ones, with a minimum detection limit of 10(7) mol/L and an enhancement factor exceeding 10(4). The stable Raman enhancement is attributed to hydrogen-terminated graphene and the nanowire structure, independent of graphene layers and maintaining stability after exposure to the atmosphere for a month.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Analytical
Xiaoxiao Zhou, Shouhui Chen, Yi Pan, Yuanfeng Wang, Naifeng Xu, Yanwen Xue, Xinlin Wei, Ying Lu
Summary: In order to improve the detection performance of surface-enhanced Raman scattering (SERS), a low-cost Au@Ag nanorods (Au@Ag NRs) substrate with a good SERS enhancement effect was developed and applied to the detection of malachite green (MG) in aquaculture water and crayfish. The developed Au@Ag NRs sensor showed a good signal enhancement effect and achieved a detection limit of 1.58 x 10(-9) M for MG in crayfish. This new tool provided stable SERS signal, uniform size and low cost for SERS signal enhancement and highly sensitive SERS detection method development.
Article
Chemistry, Multidisciplinary
Nguyen Thuy Ngoc Thuy, Huynh Nguyen Thanh Luan, Van Vo Kim Hieu, Mai Thi Thanh Ngan, Nguyen Tri Trung, Le Vu Tuan Hung, Tran T. T. Van
Summary: This work presents a simple and inexpensive method to prepare SERS substrates by creating pyramid structures through anisotropic wet etching of a silicon wafer and depositing a silver thin film on these arrays, followed by annealing to form silver nanoparticles. The optimized sizes and densities of pyramids and AgNPs allow for the detection of abamectin concentrations as low as 5.7 x 10(-9) M, with a strong SERS signal observed at a pyramid base-edge size of 7-10 µm, showing high potential for applications in medicine, biotechnology, and food security sensing.
Article
Spectroscopy
Longxiu Feng, Junli Duan, Kun Wang, Lei Huang, Guina Xiao
Summary: This study prepared silver nanoparticles on drawing paper substrates using a robotic writing technique, which exhibited high sensitivity for SERS applications with good reproducibility and uniformity.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Multidisciplinary
Wen-Chien Huang, Ken-Fa Cheng, Jing-Yuan Shyu
Summary: In this study, flexible CS-ATS-Ag cotton swabs were prepared for the highly sensitive and reproducible detection of melamine. The development of chemical analysis App software enabled real-time transmission, timely processing, high sensitivity, portability, and low cost.
NANOSCALE ADVANCES
(2022)
Article
Spectroscopy
Rasoul Gheitaran, Abbas Afkhami, Tayyebeh Madrakian
Summary: The synthesis of polyol-silver nanocubes (Ag NCs) under dark conditions resulted in highly uniform and pure nanoparticles with an edge length of 42 nm. These nanoparticles, capped with polyvinylpyrrolidone (PVP), were used as Resonance Rayleigh Scattering (RRS) probes to measure the antipsychotic drug Haloperidol (Hp). The study found that Hp reduced the RRS signal of Ag NCs, and this change in intensity was linearly related to the concentration of Hp.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Materials Science, Multidisciplinary
Jiacheng Zhu, Li Sun, Yuejin Shan, Yuan Zhi, Jian Chen, Binlin Dou, Wenxian Su
Summary: A green and reliable seed-mediated electroless deposition method using Sargentgloryvine stem extract as reducing and capping agent is explored to prepare silver nanofilms, which can be facilely controlled in particle size and display superior sensitivity and reproducibility towards Rhodamine 6G molecules after optimization. The method provides a promising route for the preparation of other metal nanofilms.
Article
Spectroscopy
Min Chen, Yiqun Huang, Junjian Miao, Yuxia Fan, Keqiang Lai
Summary: Concerns about food safety have been raised due to improper use of chemicals in aquaculture, particularly malachite green (MG) which can have negative impacts on the environment and public health. Surface-enhanced Raman scattering (SERS) platforms coupled with reusable SERS substrates are used for rapid analysis of MG residues in food. In this study, a novel SERS substrate combining metal-organic framework material (MIL-100(Fe)) and Au NPs was prepared, showing high sensitivity and recyclability. The sensor successfully detected trace amounts of MG in fish pond water and showed great potential for food contamination monitoring.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Multidisciplinary
Zhenming Wang, Jianxun Liu, Jiawei Wang, Zongjun Ma, Delai Kong, Shouzhen Jiang, Dan Luo, Yan Jun Liu
Summary: This paper presents a cost-effective, large-sized, and highly reproducible SERS substrate prepared by nanosphere lithography technique. By manipulating the geometry of the Ag metasurface deposited on the substrate and coating a thin layer of graphene oxide, high enhancement factor and low detection limit of SERS performance have been achieved. Experimental results demonstrate the potential application value of this method for trace detection in fields like food safety control and environmental monitoring.
Article
Chemistry, Analytical
Song-Song Zhao, Chun-Jing Ma, Yang Xu, Xue-Cai Tan, Qi Wang, Jun Yan
Summary: In this report, a SERS substrate named MIL-101-MA@Ag is developed by combining the enrichment ability of MIL-101(Cr) and the local surface plasma resonance (LSPR) of silver nanoparticles, which can produce high-density and uniformly distributed hot spots. The substrate has demonstrated good SERS activity for the detection of malachite green (MG) and crystal violet (CV) with low detection limits. It has also been successfully applied to detect MG and CV in tilapia with high recovery rate and relatively low standard deviation.
Article
Chemistry, Analytical
Lan Luo, Yanhua Chen, Lixia Zhang, Yaru Li, Hongli Li, Hanqi Zhang, Yuan Tian
Article
Chemistry, Analytical
Ping Zhang, Jie Ding, Juan Hou, Li Zhao, Yanhua Chen, Lan Ding
MICROCHEMICAL JOURNAL
(2017)
Article
Engineering, Environmental
Tianyu Zhou, Jie Ding, Zhongyu He, Jingyao Li, Zihui Liang, Caiyun Li, Yi Li, Yanhua Chen, Lan Ding
CHEMICAL ENGINEERING JOURNAL
(2018)
Article
Chemistry, Analytical
Yuan Xu, Huiyu Li, Bo Wang, Haochi Liu, Li Zhao, Tianyu Zhou, Meitong Liu, Ning Huang, Yi Li, Lan Ding, Yanhua Chen
Article
Chemistry, Analytical
Huiyu Li, Yuan Xu, Jie Ding, Li Zhao, Tianyu Zhou, Hong Ding, Yanhua Chen, Lan Ding
Article
Chemistry, Analytical
Tianyu Zhou, Jie Ding, Qiang Wang, Yuan Xu, Bo Wang, Li Zhao, Hong Ding, Yanhua Chen, Lan Ding
Article
Chemistry, Multidisciplinary
Haochi Liu, Lan Ding, Ligang Chen, Yanhua Chen, Tianyu Zhou, Huiyu Li, Yuan Xu, Li Zhao, Ning Huang
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2019)
Article
Biochemical Research Methods
Li Zhao, Huiyu Li, Haochi Liu, Meitong Liu, Ning Huang, Zhongyu He, Yi Li, Yanhua Chen, Lan Ding
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2019)
Article
Chemistry, Multidisciplinary
Yahan Cui, Liyan Jiang, Huiyu Li, Di Meng, Yanhua Chen, Lan Ding, Yang Xu
Summary: The study developed a new method for determining sulfa antibiotics in feeds by molecularly imprinted electrospun nanofibre membrane (MIM) assisted stir bar sorptive extraction, achieving selective enrichment of SAs.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Engineering, Environmental
Yahan Cui, Yanhua Chen, Lan Ding
Summary: In this study, a type of magnetic imprinted materials (SMMIPs) with excellent solvent-responsiveness were prepared, which can easily adsorb templates BPA in water and desorb the adsorbed BPA in organic solvents without the aid of acid. The SMMIPs maintained high adsorption even after reuse in successive four cycles, and were successfully employed for the determination and separation of trace BPA in environmental waters and orange juice.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Yahan Cui, Jiasheng Lin, Yang Xu, Qiaoyan Li, Yanhua Chen, Lan Ding
Summary: In this study, magnetic molecularly imprinted polymers (MMIPs) with enhanced selectivity were synthesized using sulfamethazine (SMZ) as template molecule and a hydrophilic crosslinker. The developed MMIPs showed efficient adsorption and preferred binding ability for SMZ, offering a potential method for the accurate determination of SMZ in environmental water.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Review
Chemistry, Physical
Yanhua Chen, Zhifeng Ding
Summary: This short review summarizes the bioanalytical strategies currently employed in electrochemiluminescence (ECL) detections of microRNAs (miRNAs), which have an extremely low detection limit and show great potential for point-of-need testing of diseases.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Article
Chemistry, Analytical
Rui Xu, Jiasheng Lin, Yanjie Wang, Yahan Cui, Lan Ding, Yanhua Chen
Summary: This manuscript proposes a novel strategy for designing and preparing magnetic molecularly imprinted polymers (MMIPs), and establishes a fluorescent sensor for low-cost and fast detection of Sudan I using the synthesized MMIPs. The fluorescence intensity of the MMIPs decreases linearly with the concentration of Sudan I, and the detection limit is 0.38 μM. The sensor demonstrates satisfactory performance for the quantification of Sudan I in chili powder, with a wide concentration range and good precision. The prepared MMIPs show great potential for low-cost and fast detection in food safety analysis.
ANALYTICAL METHODS
(2023)
Article
Chemistry, Analytical
Yanhua Chen, Jiasheng Lin, Ruizhong Zhang, Shuijian He, Zhifeng Ding, Lan Ding
Summary: A facile one-pot hydrothermal approach was used to synthesize water-dispersed nitrogen and sulfur doped carbon dots (NS-CDs) with high luminescence quantum yield, using cysteine and tryptophan as precursors. The NS-CDs showed great potential in bioanalytical applications, with an absolute photoluminescence quantum yield reaching up to 73%. The study also investigated the electrochemiluminescence behaviors and mechanisms of the NS-CDs/K2S2O8 coreactant system, showing a 24% efficiency relative to Ru(bpy)(3)Cl-2/K2S2O8.
Article
Chemistry, Analytical
He Zhongyu, Cui Yahan, Huang Ning, Yang Shuliang, Chen Yanhua, Ding Lan
CHINESE JOURNAL OF CHROMATOGRAPHY
(2020)
Article
Chemistry, Analytical
Gang Qu, Yuxin Zhao, Qiaoli Zhang, Jina Wu, Xiaosen Li, Yang Yang, Shilei Liu
Summary: In this study, magnetic mesoporous materials combined with real-time in situ mass spectrometry were used for the high-throughput detection of hydrolyzed products of organophosphorus nerve agents. The method showed good linearity, low limits of detection and quantification, and high extraction recoveries. The magnetic preparation method used was quick, cost-effective, rugged, and safe. The results demonstrated the potential of this method for rapid and efficient determination of the target analytes in environmental samples.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Anna Hildebrand, Mariam Merchant, Danny O'Hare
Summary: Substandard and falsified artemisinin derivatives in antimalarials have caused significant deaths and economic losses. This study evaluates the feasibility of voltammetric methods for identifying and quantifying artemether. The findings suggest that electrochemical analysis shows promise as a method for artemether identification and quantification.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Marx Osorio Araujo Pereira, Alvaro Ferreira Junior, Edson Silvio Batista Rodrigues, Helena Mulser, Giovanna Nascimento de Mello e Silva, Wallans Torres Pio dos Santos, Eric de Souza Gil
Summary: Brazilian spotted fever (BSF) is a serious and rapidly evolving disease. A new impedimetric immunosensor was developed for rapid diagnosis by measuring specific antibodies in plasma. The sensor demonstrated selectivity and accuracy, and has potential for important applications in diagnostic testing.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Kathrin Schilling, Ronald A. Glabonjat, Olgica Balac, Marta Galvez-Fernandez, Arce Domingo-Relloso, Vesna Slavkovich, Jeff Goldsmith, Miranda R. Jones, Tiffany R. Sanchez, Ana Navas-Acien
Summary: Analysis of trace elements in urine is an important tool for assessing exposures, diagnosing nutritional status, and guiding public health and healthcare intervention. This study provides a sensitive method for analyzing 18 elements in urine samples, using only 100 μL. The results show good accuracy and sensitivity of the method.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Mengya Li, Shijie Liu, Shiliang Guo, Dong Liang, Miaoyun Li, Yaodi Zhu, Lijun Zhao, Jong-Hoon Lee, Gaiming Zhao, Yangyang Ma, Yanxia Liu
Summary: In this study, a magnetic flow device was developed to purify spores in a culture medium system. The device used magnetic nanoparticles to absorb vegetative cells, separating them from the spores. The achieved purity of the collected spores was over 95%. The study also demonstrated a rapid quantitative detection method using Raman spectroscopy.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Wanqiong Liu, Zixuan Wu, Jianwei Peng, Zebin Xu, Yong Liang
Summary: Metal-organic frameworks (MOFs) are effective carriers for molecular imprinting, but their poor dispersibility in aqueous solution is a significant drawback. In this study, we have applied amphiphilic block copolymers and molecularly imprinted technology on MOFs to improve the hydrophilicity of molecularly imprinted fluorescent materials.
ANALYTICAL METHODS
(2024)
