Article
Chemistry, Applied
Jiale Zhang, Caijun Wu, Ruo Yuan, Jian-An Huang, Xia Yang
Summary: This study reports a subtle surface-enhanced Raman scattering (SERS) substrate for detecting the dithiocarbamate fungicide Thiram. By controlling the inter-particle spacing of gold-silver-gold nanoparticles, a remarkable enhancement of Raman signal and stability was achieved. This method holds potential for rapid assessment and identification of pesticides on foods.
Correction
Chemistry, Physical
Xuan-Hung Pham, Eunil Hahm, Tae Han Kim, Hyung-Mo Kim, Sang Hun Lee, SangChul Lee, Homan Kang, Ho-Young Lee, Dae Hong Jeong, Hak Soo Choi, Bong-Hyun Jun
Summary: The author name and corresponding affiliation in the original version of this article were mistakenly labeled.
Article
Nanoscience & Nanotechnology
Xingxing Yu, Yan Sun, Jieyu Hu, Junjie Wang, Xiumei Zhuang, Shenghao Zhang, Haiting Ren, Hongxing Qiu, Yueshou Zhang, Yongjun Hu
Summary: A three-dimensional MoS2/Au/Ag nanostructure was developed for rapid and sensitive detection of pesticide residues using Surface-enhanced Raman scattering (SERS). The nanostructures combine the advantages of high-enhancement SERS substrates and high-accuracy ratiometric Raman detection. They showed excellent SERS activity in ratiometric analysis and successfully detected thiabendazole (TBZ) in apple juice with a limit of detection down to 0.1 ppm.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Guojun Weng, Jianming Yang, Jianjun Li, Jian Zhu, Junwu Zhao
Summary: Bimetallic silver/gold nanostructures with high chemical stability and numerous hot spots have been synthesized using a facile etching method. The etching process resulted in changes in morphology and SERS activity of the nanostructures. Interestingly, the etched nanostructures showed higher SERS activity than pure silver nanostructures, contrary to previous reports.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Fuqi Yao, Jiamiao Wang, Wei Zhang, Zhetao Wang, Yunfeng Li, Hao Sun, Qiang Chen, Pei Liang
Summary: Noble metal nanoparticles are durable due to their unique Localized Surface Plasmon Resonance (LSPR) properties, making them suitable for medical testing and biosensing. This study presents a microfluidic platform for controlled synthesis of uniform Au@Ag nanocubes in 15 minutes. The synthesized nanocubes show satisfactory results in detecting Raman probe methylene blue and antibiotic sulfadiazine using surface-enhanced Raman scattering (SERS).
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Physical
Kiichirou Koyasu, Tatsuya Tsukuda
Summary: Gas-phase methods offer novel insights into the intrinsic geometric and electronic structures of chemically synthesized Au/Ag clusters, which cannot be obtained by conventional characterization methods. This provides new perspectives for building functional materials and studying size-dependent structures.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Biochemical Research Methods
Wendai Cheng, Ping Tang, Xuanmeng He, Xinyue Xing, Shengde Liu, Feng Zhang, Xiaoxu Lu, Liyun Zhong
Summary: The synthesized Au/Ag composite-based SERS nanoprobe showed significant advantages in sensitivity and response speed for quantitative characterization of Cr3+ content. This nanoprobe might offer a new strategy for dynamic monitoring of Cr3+ content in human metabolism.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Sebin Augustine, Mahesh Saini, K. P. Sooraj, Basanta Kumar Parida, Sukriti Hans, Vivek Pachchigar, Biswarup Satpati, Mukesh Ranjan
Summary: Self-organized Ag nanoparticles arrays capped with Au layer are produced and show intermediate plasmonic properties. The optimized Au deposition decreases the interparticle gap and elongates the nanoparticles along the ripple direction, resulting in a larger redshift in the LSPR. The substrate exhibits good spatial uniformity and high SERS enhancement factors for both 532 nm and 785 nm lasers.
Article
Physics, Multidisciplinary
Xin Zhu, Jingyun Zhang, Cuihong Yang, Ying Li, Yunyun Chen
Summary: We investigate the influence of shape truncation on the plasmonic properties of a single Ag nanowire in an Au film nanocavity. The results show that truncation has a significant effect on the plasmonic properties, with a blue shift in the scattering peak position from 962 nm to 608 nm. The electric field strength and charge distribution reveal an evolution from dipole mode to quadrupole mode. Our findings contribute to the development of high-performance tunable optical nano-devices in the future.
CHINESE PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Ping Wen, Feng Yang, Chuang Ge, Shunbo Li, Yi Xu, Li Chen
Summary: An efficient nano-Ag/Au@Au film composite SERS substrate was proposed for the rapid detection of creatinine in human serum. Finite element simulation analysis and experimental results showed that the substrate had high enhancement factor and low limit of detection for R6G molecules. The label-free detection of human serum creatinine using the SERS substrate demonstrated a low LOD and high linear correlation coefficient, indicating its potential for disease biomarker detection.
Article
Chemistry, Physical
Jing Wu, Jinghuai Fang, Lu Xu
Summary: Through the combination of confined spherization technique and in-situ substitution reaction, large-area periodic Ag-Au composite nanostructures with enhanced SERS activity were successfully constructed in this study. The prepared nanostructures exhibited outstanding detection sensitivity and signal homogeneity for various molecules, and showed high-stability of SERS responses after being stored for one year.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Analytical
Hongying Li, Jiale Zhang, Lingling Jiang, Ruo Yuan, Xia Yang
Summary: The identification of enantiomers is crucial in chiral separations and medicinal chemistry. Surface-enhanced Raman spectroscopy (SERS) is used to distinguish enantiomers by exploiting the SERS difference between left and right-handed circularly polarized light or additional selectors. In this study, L/D-Au@Ag core shell nanobipyramids were synthesized utilizing L/D-cysteine as a chiral encoder. These nanobipyramids exhibited plasmon-induced circular dichroism signals and could be tuned by adjusting the amount of cysteine. They were further used as SERS substrates for effective discrimination of biologically relevant small molecules, showing potential for chiral drug identification.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Physical
Govind Kumar, Ravi Kant Soni
Summary: This study presents a simple route to design highly sensitive SERS substrates based on triangular silver nanoplates, achieved by controlling the reaction kinetics and seed volume in a modified seed-mediated approach to tune the localized surface plasmon resonance. The research reveals that the size, shape, and dipolar plasmon resonance wavelength of the silver nanoplates are the principal contributing factors for designing high-performance SERS substrates.
Article
Agriculture, Multidisciplinary
Yinjuan Xu, Zhao Jin, Yuan Zhao
Summary: It is important to develop a sensitive and accurate method for monitoring staphylococcal enterotoxin C (SEC) in food, as it poses a serious risk to human health. In this study, a surface-enhanced Raman scattering (SERS) aptasensor was developed for the quantitative detection of SEC. The use of solid gold-silver Janus@gold nanoparticles (Au-Ag Janus@Au NPs) with intrinsic and enhanced SERS activity allowed for sensitive and reliable detection of SEC, with a limit of detection as low as 0.55 pg/mL. This research expands the application prospects of label-free SERS detection probes in complex systems for food safety monitoring.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2023)
Article
Chemistry, Analytical
Boris N. Khlebtsov, Andrey M. Burov, Andrey M. Zakharevich, Nikolai G. Khlebtsov
Summary: In this study, a simple and quantitative non-enzymatic detection method for hydrogen peroxide was developed using Au@Ag nanorods with embedded Raman active molecules. The sensitivity of nanoparticles with different morphologies was compared, and triangle core-shell nanoparticles exhibited the highest sensitivity. Additionally, a colorimetric strategy was applied to fabricate a simple indicator paper sensor for fast detection of hydrogen peroxide in liquids.
