Open AccessHighly Stable Polymer Coating on Silver Nanoparticles for Efficient Plasmonic Enhancement of Fluorescence
Author(s) -
Ryo Kato,
Mitsuhiro Uesugi,
Yoshie Komatsu,
Fusatoshi Okamoto,
Takuo Tanaka,
Fumihisa Kitawaki,
Taka-aki Yano
Publication year - 2022
Publication title -
acs omega
Language(s) - English
Resource type - Journals
ISSN - 2470-1343
DOI - 10.1021/acsomega.1c06010
Subject(s) - polymer , nanoparticle , materials science , fluorescence , silver nanoparticle , coating , covalent bond , conjugated system , nanotechnology , plasmon , quenching (fluorescence) , surface plasmon resonance , plasmonic nanoparticles , biosensor , surface modification , chemical engineering , chemistry , optoelectronics , organic chemistry , composite material , optics , physics , engineering
Surface coating of plasmonic nanoparticles is of huge importance to suppress fluorescence quenching in plasmon-enhanced fluorescence sensing. Herein, a one-pot method for synthesizing polymer-coated silver nanoparticles was developed using a functional polymer conjugated with disulfide-containing anchoring groups. The disulfides played a crucial role in covalently bonding polymers to the surface of the silver nanoparticles. The covalent bond enabled the polymer layer to form a long-term stable coating on the silver nanoparticles. The polymer layer coated was adequately thin to efficiently achieve plasmonic enhancement of fluorescence and also thick enough to effectively suppress quenching of fluorescence, achieving a huge net enhancement of fluorescence. The polymer-coated plasmonic nanoparticles are a promising platform for demonstrating highly sensitive biosensing for medical diagnostics.