Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 26, Issue 24, Pages 1942-1947Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200500597
Keywords
nanocomposites; poly(vinyl alcohol); Raman spectroscopy; silver nanoparticles; surface-enhanced Raman scattering
Categories
Ask authors/readers for more resources
Surface-enhanced Raman scattering (SERS)active substrates with high enhancement were prepared by an in situ reduction method. Novel silver/poly(vinyl alcohol) (PVA) nanocomposite films were obtained, in which the silver nitrate, poly(gamma-glutamic acid) (PGA), and PVA acted as precursor, stabilizer, and polyol reducant, respectively. The UV-visible spectra of the as-fabricated films showed that the surface plasmon resonance (SPR) absorption band was narrow and of a stronger intensity, which indicates that the Ag nanoparticle size distribution on the substrate was highly uniform. This finding was further confirmed by X-ray diffraction (XRD), transmission electron microscopy (TEM), and field-emission scanning electron microscope (FE-SEM) measurements. It was found that a PGA-stabilized PVA nanocomposite film revealed the presence of well-dispersed spherical silver nanoparticles with an average diameter of 90 nm. The new substrate presents high SERS enhancement and the enhanced factor is estimated to be 10(6) for the detection of benzoic acid.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available