Article
Chemistry, Multidisciplinary
Juanjuan Guo, Yang Xu, Caili Fu, Longhua Guo
Summary: Surface-enhanced Raman spectroscopy (SERS) is a promising analytical technique with sensitivity at the single-molecule level, but faces challenges in preparing large-scale, reproducible, and highly sensitive substrates. In this study, a new strategy using CTAB as a connection agent successfully fabricates an efficient Ag collide SERS substrate, demonstrating significant improvement in detection efficiency and reproducibility for applications on a large scale.
Article
Spectroscopy
Kaiqiang Wang, Jinjie Li
Summary: In this study, a high-performance surface-enhanced Raman spectroscopy (SERS) analytic platform was developed through self-assembly of nanoparticles and achieved high reproducibility and accuracy for measuring chemical contaminants in various phases. The use of an internal standard to correct signal fluctuations improved point-to-point and batch-to-batch reproducibility, enabling high-sensitive detection and improved accuracy for pesticide analysis.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
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
Nanoscience & Nanotechnology
Lixiang Xing, Yujiao Xiahou, Xiang Zhang, Wei Du, Panpan Zhang, Haibing Xia
Summary: In this study, core-shell Au-5.5@Ag-m nanoparticles with controlled thicknesses of Ag shells were successfully synthesized. High-quality monolayer films of hexagonal close-packed Au@Ag nanoparticles were fabricated using self-assembly methods. These films exhibited uniform surface-enhanced Raman scattering signals when transferred onto PDMS substrates. They showed high sensitivity and quantitative detection ability for crystal violet and 4-aminothiophenol.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Spectroscopy
Baihui Wang, Xuemin Xia, Ruyi Tang, Huan Jiang, Mengyao Qi, Xia Zhang
Summary: The low temperature solvothermal method was used to synthesize Cr2O3 nanoparticles with both peroxidase and oxidase activities. The oxidase activity of Cr2O3 nanoparticles was effectively shielded by immobilizing them in a nanogel using three monomers. The enzymatic activity of Cr2O3@nanogel/Au was significantly enhanced by doping with gold nanoparticles. A Surface Enhanced Raman Spectroscopy (SERS) strategy was proposed for the detection of H2O2 using Cr2O3@nanogel/Au.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Physical
Yingkuan Han, Le Qiang, Yakun Gao, Jianwei Gao, Qihang He, Hong Liu, Lin Han, Yu Zhang
Summary: The study successfully developed large area SERS substrates by combining Au/Ag with porous GaN nanostructures, achieving a high performance with good uniformity and stability for potential early-cancer diagnosis and ultrasensitive biosensors.
APPLIED SURFACE SCIENCE
(2021)
Article
Optics
Zhengkun Wang, Haiyang Sha, Ke Yang, Yong Zhu, Jie Zhang
Summary: In this study, the plasmonic response of self-assembled monolayer silver nanoparticles was comprehensively investigated using various computational and experimental techniques. The Fano resonance and SERS application were studied, and it was found that the higher-energy antibonding mode is not only from the antibonding dipole-dipole mode, but also from the antibonding quadrupole-quadrupole mode and hybridized magnetic mode. The effects of dimer gap and size were discussed in detail, and a two coupled oscillators model was used to illustrate the mechanism of the Fano resonance.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Mizuki Matsukawa, Ke-Hsuan Wang, Yoshiro Imura, Takeshi Kawai
Summary: This study developed a method for fabricating flexible and transparent Au nanosheets conductive electrodes using UV irradiation, and demonstrated the reusability of Au nanoparticle dispersions in preparing transparent flexible electrodes.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Coatings & Films
Yi-Jui Yeh, Chih-Yu Liu, Jinn P. Chu, Wei-Hung Chiang, Kuo-Lun Tung
Summary: This study reports on a highly-sensitive and stable surface-enhanced Raman scattering (SERS) substrate based on metallic nanostructure array, which can be fabricated at low cost.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Mohit Tiwari, Aditya Singh, Samit Dureja, Suddhasatwa Basu, Sudip K. Pattanayek
Summary: The study focuses on using Au-ZZF SERS substrate for identification of R6G and melamine at different concentrations, showing high enhancement factors and sensitivity. Experimental results demonstrate that SERS enhancement is attributed to the electron movement within ZZF and Au nanoparticles.
Article
Chemistry, Analytical
Junfang Hao, Min He, Bin Liu, Jianhui Yang
Summary: The preparation of highly ordered monodisperse gold nanoparticles using oleylamine-reduced method was investigated in this study. It was found that using toluene as the solvent resulted in the best dispersity and narrowest particle size distribution of the gold nanoparticles. The size of the nanoparticles increased with the increase in reaction temperature. The highly ordered self-assembly film of gold nanoparticles showed excellent SERS performance as a substrate.
Article
Engineering, Environmental
Dabum Kim, Jeonghun Kim, Joel Henzie, Youngsang Ko, Hyunsoo Lim, Goomin Kwon, Jongbeom Na, Hyun-Jong Kim, Yusuke Yamauchi, Jungmok You
Summary: The study reported a method to fabricate nanoarchitectured mesoporous gold films on flexible cellulose nanofiber paper for high-performance surface-enhanced Raman scattering substrates. The resulting substrate showed highly sensitive detection capabilities for various analytes and can be used as a versatile chemical detection platform.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Spectroscopy
Junming Cao, Jiewen Yang, Qi Wang, Xueguang Yuan, Hao Liu, Zhenqi Pang, Kai Liu, Shiwei Cai, Xiaomin Ren
Summary: This paper demonstrates a facile method to improve the robustness of flexible SERS substrates using rigid SiO2 nanospheres and flexible tape, which shows great potential for practical molecule detection on curved surfaces.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Physics, Applied
Kai Takeuchi, Junsha Wang, Beomjoon Kim, Tadatomo Suga, Eiji Higurashi
Summary: The surface activated bonding (SAB) technique allows room temperature bonding of metals by forming metal bonds between clean and reactive surfaces. However, re-adsorption on the activated surface decreases the bonding quality, limiting its applicability for electronics packaging. This study proposes and demonstrates the prolongation of surface activation effect for room temperature bonding of Au using a self-assembled monolayer (SAM) protection. The surface analysis shows that the clean and activated Au surface is protected from re-adsorption by SAM, allowing for time-independent bonding of Au at room temperature.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Gregory Barbillon, Octavio Graniel, Mikhael Bechelany
Summary: The SERS effect was significantly improved by assembled Au/ZnO nano-urchins due to their excellent adsorption capacity for thiram molecules. The detection limit for thiram was found to be 10 pM, with an adsorption capacity (K) of 9.5 x 10(6) M-1 and an analytical enhancement factor of 1.9 x 10(8).