Open AccessFabrication of hydrogels with nanoparticles as surface-enhanced Raman scattered (SERS) substrates and their application in Raman imaging
Author(s) -
Chwan-Hwa Wu,
Fang Li,
Feng Lv,
Pei Yao,
Minghai Bi,
Tao Xue
Publication year - 2021
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/abd5d0
Subject(s) - crystal violet , raman spectroscopy , raman scattering , materials science , polyvinyl alcohol , rhodamine 6g , rhodamine b , substrate (aquarium) , rhodamine , nanoparticle , nanotechnology , methylene blue , fabrication , chemical engineering , molecule , chemistry , optics , composite material , organic chemistry , medicine , physics , oceanography , alternative medicine , engineering , pathology , photocatalysis , fluorescence , geology , catalysis
A polyvinyl alcohol–silver nanoparticle (PVA–Ag NP) hydrogel was fabricated using a simple and facile method; it was used as a substrate for surface-enhanced Raman scattering (SERS). The Ag + ions dispersed uniformly in the PVA network were reduced by NaBH 4 ; this process was termed dipping method . Compared with conventional SERS substrates (e.g., colloidal suspensions), the prepared PVA–Ag NP hydrogel has prominent Raman enhancement effects for crystal violet (CV), and the detection limit was 10 −12 M. It could also help detect rhodamine B, methylene blue, and 4-mercaptobenzoic acid. In addition to SERS, the reliable 3D porous structure was utilized in the Raman imaging of CV at 1621 cm −1 in a nude mouse.