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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.)

Porous Polymeric Templates on ITO Prepared by Breath Figure Method for Gold Electrodeposition

Full text
Author(s):
Colombo, Rafael N. P. [1] ; Petri, Denise F. S. [1] ; Cordoba de Torresi, Susana I. [1] ; Goncales, Vinicius R. [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Inst Quim, BR-05513970 Sao Paulo, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Electrochimica Acta; v. 158, p. 187-195, MAR 10 2015.
Web of Science Citations: 3
Abstract

The formation of porous spin-coated poly(methyl methacrylate) (PMMA) films on indium tin oxide (ITO) by breath figure method (BFM) is simple, fast and low cost. The porous PMMA film was applied as template for gold electrodeposition, allowing the control of the (i) amount of electrodeposited material by monitoring the charge densities and (ii) morphology of the resulting structure by properly setting the deposition kinetics. The precise control of the deposition conditions was crucial in order to avoid the loss of the desired patterned structure. This issue was investigated by varying the charge densities from 1.0 x 10(-2) to 4.0 x 10(-2)Ccm(-2). Moreover, the variation in the cathodic current densities from 4.0 x 10(-5) to 4.0 x 10(-3)Acm(-2) directly affected the roughness of the obtained gold particles. Finally, the method employed for the removal of porous PMMA affects the gold structure: the dissolution of PMMA in dimethylformamide (DMF) led to the formation of gold particles with (270 +/- 50) nm in diameter, while the calcination of the polymeric membranes generated gold rings with (400 +/- 100) nm in diameter. Such gold structures are relevant for applications in spectroscopy, (bio) sensors, catalysis and photonics. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 09/53199-3 - Molecular recognition and energy storage: fundamental studies concerning geometry, size and synthesis effects on the optimization of the chemical properties of electroactive materials
Grantee:Roberto Manuel Torresi
Support type: Research Projects - Thematic Grants
FAPESP's process: 12/22755-0 - Optimization of biosensors based on the interaction between reduced graphene oxide and biomolecules.
Grantee:Rafael Neri Prystaj Colombo
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 11/15159-0 - Third generation biosensors based on the interaction among reduced graphene oxide, ionic liquids and oxidase enzymes.
Grantee:Vinicius Romero Gonçales
Support type: Scholarships in Brazil - Post-Doctorate