Using Polycarbonate Membranes as Templates for the Preparation of Au Nanostructures for Surface-Enhanced Raman Scattering

Autor(es)

Batista, Elisete A. ^[1] ; dos Santos, Diego P. ^[1] ; Andrade, Gustavo F. S. ^[1] ; Sant'Ana, Antonio C. ^[1] ; Brolo, Alexandre G. ^{[1, 2]} ; Temperini, Marcia L. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim, BR-05513970 Sao Paulo - Brazil

^[2] Univ Victoria, Dept Chem, Victoria, BC V8W 3V6 - Canada

• Tipo de documento: Artigo Científico
• Fonte: Journal of Nanoscience and Nanotechnology; v. 9, n. 5, p. 3233-3238, MAY 2009.
• Citações Web of Science: 19

Resumo

Polycarbonate membranes (PCM) of various pores sizes (400, 200, 100 and 50 nm) were used as templates for gold deposition. The electrodeposition from gold ions resulted in the formation of gold nanotubes when large pores size PCMs (400 and 200 nm) were used. On the other hand, gold nanowires were predominant for the PCMs with smaller pores size (100 and 50 nm). Surface-enhanced Raman scattering (SERS) from the probe molecule 4-mercaptopyridine (4-MPy) was obtained from all these nanostructures. The SERS efficiency of the substrates produced using the PC M templates were compared to two commonly used SERS platforms: a roughened gold electrode and gold nanostructures electrodeposited through organized polystyrene spheres (PSS). The SERS signal of the probe molecule increased as the pore diameter of the PCM template decreased. Moreover, the SERS efficiency from the nanostructures produced using 50 nm PCM templates was four and two times better than the signal from the roughened gold electrode and the PSS template, respectively. The SERS substrates prepared using PCM templates were more homogenous over a larger area (ca. 1 cm(2)), presented better spatial and sample to sample reproducibility than the other substrates. These results show that SERS substrates prepared using PCM templates are promising for the fabrication of planar SERS platforms for analytical/bioanalytical applications. (AU)

• Processo FAPESP: 06/58748-7 - Reatividade, dinâmica e espectroscopia de sistemas complexos
• Beneficiário: Marcia Laudelina Arruda Temperini
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 01/09497-8 - Espectroscopia, caracterização e modelagem de microambientes
• Beneficiário: Marcia Laudelina Arruda Temperini
• Modalidade de apoio: Auxílio à Pesquisa - Temático