| Full text | |
| Author(s): |
Anna T. B. Silva
[1]
;
Andreane G. Coelho
[2]
;
Lourdes C. da S. Lopes
[3]
;
Marccus V. A. Martins
[4]
;
Frank N. Crespilho
[5]
;
Arben Merkoçi
[6]
;
Welter C. da Silva
[7]
Total Authors: 7
|
| Affiliation: | [1] Universidade Federal do Piauí. Centro de Ciências da Natureza. Departamento de Química - Brasil
[2] Universidade Federal do Piauí. Centro de Ciências da Natureza. Departamento de Química - Brasil
[3] Universidade Federal do Piauí. Centro de Ciências da Natureza. Departamento de Química - Brasil
[4] Universidade Federal do ABC. Centro de Ciências Naturais e Humanas - Brasil
[5] Universidade de São Paulo. Instituto de Química de São Carlos. Departamento de Físico-Química - Brasil
[6] Universitat Autònoma de Barcelona. Institut Catala de Nanociencia i Nanotecnologia - Espanha
[7] Universidade Federal do Piauí. Centro de Ciências da Natureza. Departamento de Química - Brasil
Total Affiliations: 7
|
| Document type: | Journal article |
| Source: | Journal of the Brazilian Chemical Society; v. 24, n. 8, p. 1237-1245, 2013-08-00. |
| Abstract | |
In this work, we report the synthesis and characterization of gold nanoparticles (AuNPs) stabilized with chitosan (Chit), as well as the capability of this material to form multilayer films with cobalt(II) tetrasulfonated phthalocyanine (CoTsPc). The new hybrid material based on Chit-AuNPs and CoTsPc was characterized by several techniques, and the electrochemical properties of an ITO (indium tin oxide) electrode modified with Chit-AuNPs and CoTsPc were investigated. Chit prevented AuNPs (diameter of 6.0 nm) agglomeration, forming a colloidal suspension that was stable for months. The interaction between the AuNPs and Chit molecules occurs mainly through the CH2 and NH3+ groups from Chit. Supramolecular interaction was observed for multilayer films of Chit-AuNPs/CoTsPc, and the AuNPs influenced the redox properties of CoTsPc. The presence of the nanoparticles not only increased the electroactive area of the electrodes, but also the rate of charge-transfer, suggesting that this material is a very promising candidate for further applications in electrochemical devices. (AU) | |
| FAPESP's process: | 11/01541-0 - Development of bioanodes composed by glucose oxidase and fructose dehydrogenase and its recombinant structures for aplication in prototype of biofuel cell: power generation from biomass (sugar cane) |
| Grantee: | Frank Nelson Crespilho |
| Support Opportunities: | Regular Research Grants |