Immobilization of Catalysts of Biological Interest on Porous Oxidized Silicon Surfaces

Author(s)

Alves, Wendel A. ^[1] ; Fiorito, Pablo A. ^[1] ; Froyer, Gerard ^[2] ; El Haber, Fady ^[2] ; Vellutini, Luc ^[2] ; Torresi, Roberto M. ^[3] ; de Torresi, Susana I. Cordoba ^[3]

Affiliation

^[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Santo Andre, SP - Brazil

^[2] Univ Nantes, CNRS, Inst Mat Jean Rouxel, UMR 6502, F-44322 Nantes - France

^[3] Univ Sao Paulo, Inst Quim, BR-05513970 Sao Paulo - Brazil

• Document type: Journal article
• Source: Journal of Nanoscience and Nanotechnology; v. 8, n. 7, p. 3570-3576, JUL 2008.
• Web of Science Citations: 5

Abstract

The present paper deals with the immobilization of redox mediators and proteins onto protected porous silicon surfaces to obtain their direct electrochemical reactions and to retain their bioactivities. This paper shows that MP-11 and viologens are able to establish chemical bonds with 3-aminopropyltriethoxylsilane-modified porous silicon surface. The functionalization of the surfaces have been fully characterized by energy dispersive X-ray analysis (EDX) and X-ray photoelectron spectroscopy (XPS) to examine the immobilization of these mediators onto the solid surface. Amperometric and open circuit potential measurements have shown the direct electron transfer between glucose oxidase and the electrode in the presence of the viologen mediator covalently linked to the 3-aminopropyltriethoxylsilane (APTES)-modified porous silicon surfaces. (AU)

• FAPESP's process: 06/50334-9 - Organized arrays of macromolecules and nanostructures for the development of sensors and microbatteries
• Grantee: Roberto Manuel Torresi
• Support Opportunities: Regular Research Grants
• FAPESP's process: 03/10015-3 - Organized arrays of macromolecules and nanostructures for the development of sensors and microbatteries
• Grantee: Roberto Manuel Torresi
• Support Opportunities: PRONEX Research - Thematic Grants