Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Emeraldine Salt Form of Polyaniline as a Probe Molecule for Surface Enhanced Raman Scattering Substrates Excited at 1064 nm

Full text
Nobrega, Marcelo M. [1] ; Souza, Klester S. [1] ; Andrade, Gustavo F. S. [2] ; Camargo, Pedro H. C. [1] ; Temperini, Marcia L. A. [1]
Total Authors: 5
[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, BR-05513970 Sao Paulo - Brazil
[2] Univ Fed Juiz de Fora, Dept Quim, Nucleo Espect & Estrutura Mol, BR-36036900 Juiz De Fora, MG - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of Physical Chemistry C; v. 117, n. 35, p. 18199-18205, SEP 5 2013.
Web of Science Citations: 13

Associating polyaniline and metallic nanoparticles may result in the combination/synergism of properties, which have been attracting great attention. This paper describes an investigation that verified the effectiveness of several gold nanostructures acting as surface enhanced Raman scattering (SERS) substrates using the emeraldine salt form of PANI (PANI-ES) as a probe-molecule. The surface enhanced resonance Raman scattering (SERRS) spectra of PANI-ES at 1064 nm results from two enhancement effects: one from the PANI-ES resonance Raman and the other from localized surface plasmon resonance of the gold nanostructures when the plasmon wavelength approaches the NIR region. A considerable SERRS intensity for PANI-ES at the 10 nM level could be obtained using a gold nanoplates colloidal suspension as substrates. The SERRS spectra of PANI-ES and the high correlation between SERRS intensity and LSPR extinction of Au nanostructures at 1064 nm indicate that the enhancement was mostly due to the electromagnetic mechanism. These results indicate that PANI-ES can be employed as a general probe-molecule for the evaluation of SERRS substrates performance at 1064 nm excitation. (AU)

FAPESP's process: 10/18107-8 - Study of the structures of PANI nanofibers and their hybrids with metallic nanostructures by Raman Spectroscopy
Grantee:Marcelo Medre Nobrega
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 11/06847-0 - Multimetallic nanostructures with hollow interiors and well-defined sizes, shapes and compositions
Grantee:Pedro Henrique Cury Camargo
Support type: Regular Research Grants