Open AccessOptimization of surface enhanced Raman scattering performance based on Ag nanoparticle-modified vanadium-titanium nanorods with tunable nanogaps
Author(s) -
Wenzhi Yuan,
Yanjun Wu,
Zhibin Zhang,
Guochao Shi,
Wei Han,
Kuihua Li,
Jungai Gu,
Congzhe Chen,
Jialin Ge,
Wenying Zhou,
Jiahao Cui,
Mingli Wang
Publication year - 2022
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.474108
Subject(s) - nanorod , materials science , raman scattering , raman spectroscopy , nanotechnology , nanoparticle , detection limit , nanomaterials , nanostructure , substrate (aquarium) , surface enhanced raman spectroscopy , titanium , optoelectronics , optics , chemistry , chromatography , metallurgy , physics , oceanography , geology
The combination of new noble metal nanomaterials and surface enhanced Raman scattering (SERS) technology has become a new strategy to solve the problem of low sensitivity in the detection of traditional Chinese medicine. In this work, taking natural cicada wing (C.w.) as a template, by optimizing the magnetron sputtering experimental parameters for the growth of Ag nanoparticles (NPs) on vanadium-titanium (V-Ti) nanorods, the nanogaps between the nanorods were effectively regulated and the Raman signal intensity of the Ag 15 /V-Ti 20 /C.w. substrate was improved. The proposed homogeneous nanostructure exhibited high SERS activity through the synergistic effect of the electromagnetic enhancement mechanism at the nanogaps between the Ag NPs modified V-Ti nanorods. The analytical enhancement factor (AEF) value was as high as 1.819 × 10 8 , and the limit of detection (LOD) was 1 × 10 -11 M for R6G. The large-scale distribution of regular electromagnetic enhancement "hot spots" ensured the good reproducibility with the relative standard deviation (RSD) value less than 7.31%. More importantly, the active compound of Artemisinin corresponded the pharmacological effect of Artemisia annua was screened out by SERS technology, and achieved a LOD of 0.01 mg/l. This reliable preparation technology was practically applicable to produce SERS-active substrates in detection of pharmacodynamic substance in traditional Chinese medicine.