Article
Chemistry, Multidisciplinary
Tingting Fan, Yan Ke, Lijun Zhang, Li Cai, Zhongbo Li
Summary: A large-area three-dimensional well-ordered Co(OH)(2) nanoflower array film decorated with Ag nanoparticles was designed and optimized as a sensitive SERS substrate for trace detection of pesticides, showing great potential in pesticide detection.
Article
Nanoscience & Nanotechnology
Yanlin Li, Wenyuan Duan, Jian Wei
Summary: The study synthesized CoFe2O4/Ag nanostructures as SERS substrates with high sensitivity, good stability, and excellent magnetic response for efficient separation and reusability.
ACS APPLIED NANO MATERIALS
(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
Nanoscience & Nanotechnology
Meruyert Kadir, Renata Nemkayeva, Gulzhan Baigarinova, Balaussa Alpysbayeva, Aliya Assembayeva, Vladimir Smirnov
Summary: In this study, TiO2 nanotubes and nanograss were used as substrates for surface enhanced Raman scattering (SERS) by electrochemical anodizing and deposition of silver nanoparticles. The proposed SERS systems allow detection of the Raman spectrum of methylene blue at concentrations as low as 10(-12) M.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2023)
Article
Chemistry, Analytical
Chih-Yi Liu, Rahul Ram, Rahim Bakash Kolaru, Shih-Hsin Chang, Sabyasachi Chakrabortty, Yi-Nan Lin, Cheng-Shane Chu, Sajal Biring
Summary: We have developed silver-nanostructures grown on anodic alumina nanomesh (AAN) films as new-type substrates for surface-enhanced Raman scattering (SERS). The deposition of silver on AAN films creates an array of nanoparticles or nano-islands, showing a non-monotonic evolution due to the competition between metal growth and dissolution. SERS study reveals the collective contribution of electron-plasma oscillation and surface area of silver nanostructures in Raman enhancements, suggesting the fabrication of SERS substrate with larger Ag surface area for high throughput applications in commercial sectors.
SENSORS AND ACTUATORS B-CHEMICAL
(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)
Review
Chemistry, Multidisciplinary
Ilya A. Milekhin, Alexander G. Milekhin, Dietrich R. T. Zahn
Summary: This study presents the optical response of spherical CdSe nanocrystals using SERS and TERS techniques, achieving significant enhancement of optical phonons by selecting appropriate plasmonic substrates. Combining Raman scattering with atomic force microscopy offers nanoscale spatial resolution for investigating phonon properties. Gap-mode TERS further enhances Raman scattering of CdSe NCs' optical phonon modes with nanometer spatial resolution, providing new pathways for optical characterization and phonon spectrum details at the nanometer scale of single semiconductor nanostructures.
Article
Chemistry, Multidisciplinary
Qing Chen, Marie Betker, Constantin Harder, Calvin J. Brett, Matthias Schwartzkopf, Nils M. Ulrich, Maria E. Toimil-Molares, Christina Trautmann, L. Daniel Soederberg, Christian L. Weindl, Volker Koerstgens, Peter Mueller-Buschbaum, Mingming Ma, Stephan Roth
Summary: This study reports a novel strategy of utilizing cellulose nanofibril (CNF) as a template to fabricate TiO2/CNF thin films with tailored morphology and crystallinity for enhanced SERS sensitivity. By combining atomic layer deposition and thermal annealing, polymorphous TiO2/CNF thin films with defined morphology were achieved, showing a high enhancement factor in semiconductor metal oxide nanomaterial (SMON)-based SERS substrates. The improved SERS sensitivity is attributed to the cooperative modulation of CNF template morphology and TiO2 crystalline state.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Yu-Chi Chang, Mykhaylo M. Dvoynenko, Hao Ke, Hui-Hsin Hsiao, Yuh-Lin Wang, Juen-Kai Wang
Summary: Silver nanoparticles grown in nanochannels of anodic aluminum oxide on a grating form a surface-enhanced Raman scattering (SERS) substrate with double resonance from both localized and delocalized plasmons. The addition of a grating enhances the SERS signals, which are inherently wavelength-dispersed, enabling simpler designs of SERS-based sensors without the need for a spectrometer. Angle-resolved reflectance spectroscopy and electrodynamic simulation were utilized to characterize the surface plasmon polariton (SPP) of the grating and confirm the SERS enhancement mechanism.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Muhammad Shafi, Runcheng Liu, Zhipeng Zha, Can Li, Xuejian Du, Sartaj Wali, Shouzhen Jiang, Baoyuan Man, Mei Liu
Summary: SERS substrates based on hyperbolic metamaterials exhibit high sensitivity, good reproducibility, reusability, and strong enhancement factors. Adjustment of multilayer stacking and interparticle gaps of Ag NPs can further enhance SERS activity in the proposed substrate design. Ultra-low limits of detection for melamine in milk were achieved, meeting the requirements for successful implementation in the food safety field.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Thi Huyen Trang Nguyen, Thi Mai Anh Nguyen, Cong Doanh Sai, Thi Hai Yen Le, Thi Ngoc Anh Tran, Thanh Cong Bach, Van Vu Le, Nguyen Hai Pham, An Bang Ngac, Viet Tuyen Nguyen, Thi Ha Tran
Summary: The research combined sputtering and post annealing methods to prepare gold nanoparticles with uniform distribution on cover glass substrates, and studied the effect of gold thickness on the formation of nanoparticles. The study also analyzed the impact of size, inter-distance, and morphology of gold NPs on plasmon properties using SEM and absorption spectroscopy. Different morphologies' enhancement capabilities were verified using FDTD technique, demonstrating the efficient performance of the prepared gold nanoparticles arrays as SERS substrates.
Article
Chemistry, Multidisciplinary
Haichao Zhai, Chuhong Zhu, Xiujuan Wang, Yupeng Yuan, Haibin Tang
Summary: This study presents a simple method for fabricating arrays of Ag-nanoparticles decorated TiO2 nanotubes. These nanotube arrays exhibit high sensitivity and can be reused for rapid and trace SERS detection of organic chemicals.
FRONTIERS IN CHEMISTRY
(2022)
Article
Metallurgy & Metallurgical Engineering
Hao Lei, Yan Li, Meng-wei Guo, Qi-bo Zhang
Summary: A smooth Ag substrate was converted in-situ to form a nanoporous architecture by applying a redox potential signal in an alkaline solution with an appropriate pH range. The phase constitution and microstructure evolution process of the Ag substrate induced by the electrochemical redox tuning approach were systematically investigated. The expansion and contraction of the unit volume during the highly reversible electrochemical process led to the formation of highly porous Ag architectures.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Nanoscience & Nanotechnology
Xiaoyu Zhang, Aoran Fan, Yuanming Pan, Xiangqian Liu, Zitong Zhao, Yongmei Song, Xing Zhang
Summary: We propose a label-free method to analyze bodily fluids based on surface-enhanced Raman scattering (SERS) with large laser spot-swift mapping and involving the electrochemistry preparation of silver nanoparticle substrates. This method can analyze the overall properties of multicomponent liquid and identify the low-concentration components.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Analytical
Chih-Yi Liu, Rahul Ram, Rahim Bakash Kolaru, Anindya Sundar Jana, Annada Sankar Sadhu, Cheng-Shane Chu, Yi-Nan Lin, Bhola Nath Pal, Shih-Hsin Chang, Sajal Biring
Summary: This article presents SERS substrates based on efficient fabrication of Ag-filled anodic aluminum oxide (AAO) films. The substrates contain well-separated Ag-nanoparticles with a high number density and small inter-particle gap. By omitting the additional pore widening process, the throughput of substrate fabrication is improved. The substrates exhibit a low detection limit and high enhancement factor, enabling effective detection of biological and organic molecules.
