Poly(ionic liquid)s‐Based Thermal‐Responsive Microgel for Use as SERS Substrates with “ON–OFF” Switchable Effect
Year: 2024
Type: article
Abstract: A temperature-responsive surface-enhanced Raman scattering (SERS) substrate with "ON-OFF" switching based on poly(ionic liquid)s (PILs) block copolymer microgels have been designed and synthesized. The PIL units act as a joint component to anchor the gold nanoparticles (AuNPs) and analytes onto poly(N-isopropylacrylamide) (PNIPAm). This anchor allows the analytes to be fixed at the formed hot spots under temperature stimulus. Owing to the regulation of the PNIPAm segment, the SERS substrates exhibit excellent thermally responsive SERS activity with a reversible "ON-OFF" effect. Additionally, because of the anion exchange of PILs, microgels can introduce new analytes, which offers more flexibility for the system. The substrate shows excellent reversibility, controllability, and flexibility of SERS activity, which is expected to have a broad application in the field of practical SERS sensors.
Authors: Yaxian Chen, Huiting Wang, Yu Wan, Shun Li, Ling Zhang, Zhiqiang Xing, Qian Zhang,, Lixin Xia
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
Awards: G2921602708, G3337442452, G4408914605
OpenAlex ID: W4394596282