Open AccessAgNPs uniformly doped onto PVA microspheres for optical recognition application
Author(s) -
Yang Bei,
Bai Xue,
Xue Lihong,
Yang Lizhang
Publication year - 2018
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2017.0859
Subject(s) - vinyl alcohol , scanning electron microscope , x ray photoelectron spectroscopy , microsphere , aqueous solution , materials science , fourier transform infrared spectroscopy , doping , nanoparticle , chemical engineering , transmission electron microscopy , nanotechnology , surface modification , nuclear chemistry , analytical chemistry (journal) , chemistry , composite material , chromatography , polymer , optoelectronics , engineering
Via surface aldolisation or semi‐aldolisation, the surface of poly(vinyl alcohol) (PVA) microspheres was uniformly doped with sliver nanoparticles (AgNPs). Scanning electron microscope (SEM) revealed the spherical shape of the AgNPs@PVA microspheres. Fourier transform infrared spectra and X‐ray photoelectron spectra (XPS) provided information on the surface interactions between AgNPs and PVA microspheres. The AgNPs@PVA microspheres offered simple and rapid qualitative detection of Hg 2+ ions and pH values through a colour change in aqueous solution. The AgNPs@PVA microspheres also showed off–on behaviour.