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

Fabrication of patterned small blocks of nanogold-loaded PDMS and its potential as reproducible SERS substrate

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Paschoal, Alexandre Rocha [1] ; Marinho Costa, Nathalia Leal [1] ; Domingues, Raquel Aparecida [2] ; Santos, Elias Barros [2]
Total Authors: 4
[1] Univ Fed Ceara, Dept Fis, Fortaleza, Ceara - Brazil
[2] Univ Fed Sao Paulo, LQANano, Sao Jose Do Campos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Materials Letters; v. 255, NOV 15 2019.
Web of Science Citations: 1

A new method for fabricating highly patterned small blocks of nanogold-loaded PDMS, named as PDMS/Au, and their surface-enhanced Raman scattering (SERS) activity are reported. This nanocomposite is based on nanogold impregnated into polydimethylsiloxane (PDMS) elastomer, prepared previously as patterned small blocks using a polypropylene template (PPT), containing 120 small holes. All holes of PPT have the same dimensions 0.5 cm (depth) x 0.6 cm (diameter), allowing to prepare 120 patterned PDMS blocks per batch. After the reduction reaction of HAuCl4 in ethanol medium, the colorless PDMS blocks turned wine red, which was a visual indication of nanogold formation. Using para-mercaptobenzoic acid (p-MBA) as probing molecule, SERS spectra were investigated. The PDMS/Au substrate exhibited reproducibility of the p-MBA (10(6) mol L-1) Raman signal. The convenience for preparing, stability, and using makes it a promise candidate for SERS application in the fast lab and field analysis. (C) 2019 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 18/07136-9 - Nanogold dispersed into glass and polymer matrices and its application as passive sampler for gaseous elemental mercury
Grantee:Elias de Barros Santos
Support type: Regular Research Grants