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 Hg2+ ions and pH values through a colour change in aqueous solution. The AgNPs@PVA microspheres also showed off–on behaviour.
Inspec keywords: nanofabrication; chemical sensors; scanning electron microscopy; polymer blends; X-ray photoelectron spectra; Fourier transform infrared spectra; optical sensors; silver; nanoparticles
Other keywords: Ag; sliver nanoparticles; Hg2+ ions detection; scanning electron microscopy; surface interactions; surface aldolisation; PVA microspheres; Fourier transform infrared spectra; semialdolisation; X-ray photoelectron spectra; poly(vinyl alcohol) microspheres
Subjects: Chemical sensors; Photoelectron spectra of composite surfaces; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; Electromagnetic radiation spectrometry (chemical analysis); Structure of polymers, elastomers, and plastics; Chemical sensors; Infrared and Raman spectra in disordered solids
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