Article
Spectroscopy
Mohammad Kamal Hossain, Qasem Ahmed Drmosh
Summary: Plasmonic nanostructures, particularly irregular surfaces of silver nanorings, have shown promise in surface-enhanced Raman scattering (SERS) spectroscopy. Through the fabrication and characterization of clusters-based Ag nanorings, it was found that they could achieve SERS enhancement factors as high as 2.1 x 10^4. By simulating EM near-field distributions and investigating the irregular shapes and arrangements of clusters within the nanorings, a deeper understanding of the underlying EM mechanism in SERS enhancements was gained.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Materials Science, Multidisciplinary
Miao Yu, Qihang Tian, Guangyuan He, Kaimin Cui, Jihong Zhang
Summary: Surface-enhanced Raman scattering (SERS) is a novel method for low concentration molecular detection, and tapered fiber SERS probes based on silver nanocubes exhibit high sensitivity. These probes can be used for both qualitative and quantitative analysis, with an optimal cone angle of 8.3 degrees.
ADVANCED FIBER MATERIALS
(2021)
Article
Electrochemistry
Sheila Hernandez, Juan Perales-Rondon, Aranzazu Heras, Alvaro Colina
Summary: EC-SOERS is a new phenomenon that enhances the Raman signal during the oxidation of a metal surface. Studies show that carbonyl and carboxyl groups are necessary to observe this phenomenon, with a delocated charge being important factor. Evaluating the enhancement factors for different molecules with highly delocated charge and a carboxyl group sheds more light on the interaction of molecules with the electrochemically generated SOERS substrates.
ELECTROCHIMICA ACTA
(2021)
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, Multidisciplinary
Suotao Dong, Xiuhua Fu, Zhongyao Zhu, Cheng Li
Summary: This article introduces a method to enhance surface Raman scattering by utilizing the local surface plasmon resonance phenomena. By depositing silver on the surface of zinc oxide thin films with different pH values, the Raman scattering signal is significantly improved, and the optimal acid-base environment is identified.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Prem Singh, Koustav Kundu, Sezer Seckin, Keshav Bhardwaj, Tobias A. F. Koenig, Amit Jaiswal
Summary: This paper reports a method for synthesizing gold Janus nanostars (NSs) that have a smooth pentagonal morphology with sharp tips and edges on one side and a crumbled morphology on the other. The synthesis method is different from other Janus nanoparticle preparation methods and does not involve template-assisted growth or masking techniques. The optical properties and size-dependent surface-enhanced Raman scattering (SERS) activity of the Janus NSs were investigated.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Yanzhao Pang, Mingliang Jin
Summary: A highly aligned AgNW array film was prepared using a self-assembly method, which showed excellent signal reproducibility and detection ability at low concentrations. The uniform distribution of hot spots inside the AgNW substrate amplified the SERS signal.
Article
Chemistry, Analytical
Monica Ricci, Beatrice Fortuni, Raffaele Vitale, Qiang Zhang, Yasuhiko Fujita, Shuichi Toyouchi, Gang Lu, Susana Rocha, Tomoko Inose, Hiroshi Uji-I
Summary: The study introduced the use of silver nanowires as endoscopic probes for detecting intracellular Raman signals and proposed an advanced strategy to significantly enhance their performance. By uniformly forming gold structures on the smooth AgNW surface, high surface-enhanced Raman scattering efficiency was achieved, demonstrating applicability for molecular sensing in cells.
ANALYTICAL CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Laser Assisted, Savita Rani, A. K. Shukla
Summary: The fabrication of silicon nanowires by metal-assisted chemical etching and deposition of silver nanoparticles by the electroless method can be used for SERS detection of organic pollutants. Study shows that increasing the length of SiNWs decreases the enhancement of SERS, and SERS has potential in discriminating mixed dyes.
Article
Electrochemistry
Istvan Bakos, Adam Vass, Eric S. Muckley, Ilia N. Ivanov, Zsofia Keresztes
Summary: In this study, the use of copper underpotential deposition (UPD) was demonstrated to measure the electrochemically active surface area of a protein-modified gold electrode. The adsorption behavior of beta-casein was found to be influenced by the surface roughness, microstructure of the gold electrode, and the concentration of the protein solution.
ELECTROCHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Analytical
Di Liu, Huimin Gao, Wenji Jiang, Su Yan, Hao Liu, Junjie Chen, Sisi Wen, Wei Zhang, Xu Wang, Bing Zhao, Wei Song
Summary: In this study, three-dimensional Ag aerogel-supported Hg single-atom catalysts were used as an efficient SERS substrate for monitoring enhanced oxidase-like reactions. The effect of Hg2+ concentrations on the SERS properties of 3D Hg/Ag aerogel networks was investigated, and an optimized addition of Hg2+ resulted in specific enhancement. The formation of Ag-supported Hg SACs was confirmed using HAADF-STEM imaging and XPS measurement, and the oxidase-like catalytic mechanism of Hg/Ag SACs was revealed using DFT. This research provides a mild synthetic strategy for fabricating Ag aerogel-supported Hg single atoms with promising prospects in various catalytic fields.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Alex Ricardo Silva Olaya, Franziska Kuehling, Christoph Mahr, Birthe Zandersons, Andreas Rosenauer, Joerg Weissmueller, Gunther Wittstock
Summary: Nanoporous gold (NPG) with less than 1% residual Ag content was studied as an electrocatalyst for the oxidation of methanol, formaldehyde, and formate. The surface structure and oxidation reaction of NPG can be controlled by adjusting the Ag content and potential. Ag has a significant impact on the onset potential and peak current density of the catalytic reaction.
Article
Nanoscience & Nanotechnology
Dan Yu, Qilong Yin, Jiwei Wang, Jian Yang, Zimeng Chen, Zihan Gao, Qingli Huang, Shibao Li
Summary: A novel SERS-based sandwich immunoassay was developed for quantitative detection of serum biomarkers A beta 1-42 and P-Tau-181, showing great potential for early diagnosis of Alzheimer's disease. The method exhibited favorable detection performance in protein standards and differentiated AD from non-AD dementia patients in clinical serum samples.
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2021)
Article
Chemistry, Applied
Jie He, Hongxia Li, Lulu Zhang, Xiao Zhi, Xin Li, Xin Wang, Zijian Feng, Guangxia Shen, Xianting Ding
Summary: This study demonstrated an easy-prepared and low-cost surface enhanced Raman Scattering (SERS) chip for the quantitative testing of carbendazim in Chinese tea, which offers more aggregation-induced hotspots, strong 3D synergetic effects, and reduces costs without impacting performance.
Article
Chemistry, Analytical
Yu Fukunaga, Makoto Harada, Tetsuo Okada
Summary: Freezing is proposed as an efficient way to enhance sensitivity and reproducibility in SERS measurements, maximizing signal intensity and preparing a high-performance SERS platform through simple methods.
