Composite blends of gold nanorods and poly(t-butylacrylate) beads as new substrates for SERS
authors Fateixa, S; Pinheiro, PC; Nogueira, HIS; Trindade, T
nationality International
journal SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
author keywords SERS; Gold nanorods; Poly(t-butylacrylate); Nanocomposites
keywords ENHANCED RAMAN-SCATTERING; SURFACE-PLASMON RESONANCE; SILVER NANOPARTICLES; OPTICAL-PROPERTIES; NANOFIBER MATRIX; ASPECT RATIO; SHAPE; SEED; 2,2'-DITHIODIPYRIDINE; NANOCOMPOSITES
abstract Polymer based composites containing metal nanoparticles are shown to provide new substrates for SERS detection and simultaneously enable the development of new tools for molecular sensing. A very important aspect on the use of hybrid materials relates to the observation of synergistic effects that result from the use of distinct components such as a polymer and metal nanoparticles. We report here the preparation of new SERS substrates made from blends of colloidal Au (nanospheres and nanorods) and PtBA (poly(t-butylacrylate)). The observed SERS enhancement depends on the characteristics of the obtained hybrid material. When compared to the starting Au colloids, the Au/PtBA nanocomposites led to SERS spectra with more intense bands, using 2,2'-dithiodipyridine as molecular probe. The origin of the stronger Raman signal in this case, is possibly due to a combination of events related to the nanocomposite characteristics, including the formation of Au assemblies at the polymer surface due to particle clustering, and the absorption increase in a spectral region closer to the laser excitation wavelength. The strategy described here is a low-cost process with potential for the up-scale fabrication of SERS substrates, namely by using other types of nanocomposites. (C) 2013 Elsevier B.V. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 1386-1425
year published 2013
volume 113
beginning page 100
ending page 106
digital object identifier (doi) 10.1016/j.saa.2013.04.070
web of science category Spectroscopy
subject category Spectroscopy
unique article identifier WOS:000322294000013
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 2.880
5 year journal impact factor 2.571
category normalized journal impact factor percentile 84.884
dimensions (citation analysis):
altmetrics (social interaction):



 


Apoio

1suponsers_list_ciceco.jpg