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Controlling Gold Electrodeposition on Porous Polymeric Templates Produced by the Breath‐Figure Method: Fabrication of SERS‐Active Surfaces
Author(s) -
Colombo Rafael Neri Prystaj,
Moreira Rodrigo Valim,
de Faria Dalva Lúcia Araújo,
Córdoba de Torresi Susana Inés
Publication year - 2019
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201900278
Subject(s) - template , colloidal gold , nanotechnology , raman spectroscopy , porosity , fabrication , substrate (aquarium) , coating , chemistry , chemical engineering , nanoparticle , polymethyl methacrylate , spin coating , materials science , polymer , optics , medicine , physics , oceanography , engineering , pathology , geology , alternative medicine , organic chemistry
Porous structured surfaces decorated with gold nanoparticles can be fabricated in an economical two‐step process. Sub‐micrometric porous polymethyl methacrylate (PMMA) templates are formed by using the breath‐figure method (BFM) with a single‐step spin‐coating onto a conducting substrate to result in a set of delimited microdomains for gold electrodeposition. By controlling electrochemical parameters, distinct morphologies are engendered, among them, nanoparticles that present useful local Raman enhancement in the order of up to 10 6 with stability of a solid‐phase platform and characteristic chemical resistance of gold. The spatial confinement of metallic structures resulted in electromagnetic field enhancement, here compared to flat metallic surfaces where contributions of area effect and fluorescence quenching are responsible for a significant apparent enhancement to Raman spectra that has not been frequently reported to date.