Polymer based silver nanocomposites as versatile solid film and aqueous emulsion SERS substrates
authors Fateixa, S; Girao, AV; Nogueira, HIS; Trindade, T
nationality International
journal JOURNAL OF MATERIALS CHEMISTRY
keywords ENHANCED RAMAN-SCATTERING; GLASS-TRANSITION; HOT-SPOTS; SPECTROSCOPY; NANOPARTICLES; ENCAPSULATION; MINIEMULSION; ELECTRODE; COLLOIDS; SPECTRA
abstract Nanocomposites containing Ag nanoparticles (average diameter similar to 11 nm) dispersed in poly(tertbutylacrylate) were prepared by in situ polymerization via miniemulsions and constitute active and versatile SERS substrates. The use of this synthetic strategy enables the dual use of the final composites as SERS substrates, both as aqueous emulsions and as cast films, shown here by several measurements using thiosalicylic acid as the testing analyte. The main advantage of these types of materials is related to the potential to scale up and the widespread use of handy substrates, using technology already available. This requires homogeneous composite substrates with SERS activity and this was demonstrated here by means of confocal Raman microscopy. Finally, a series of experiments were carried out on Ag/polymer nanocomposites submitted to temperature variations below and above the polymer glass transition temperature (T(g)) in order to conclude about the effect of temperature processing conditions on the composites' SERS activity.
publisher ROYAL SOC CHEMISTRY
issn 0959-9428
year published 2011
volume 21
issue 39
beginning page 15629
ending page 15636
digital object identifier (doi) 10.1039/c1jm12444g
web of science category Chemistry, Physical; Materials Science, Multidisciplinary
subject category Chemistry; Materials Science
unique article identifier WOS:000295278000076

Apoio

1suponsers_list_ciceco.jpg