Comparison of Microcontact-Printed and Solution-Adsorbed Cytochrome c Films on Indium Tin Oxide Electrodes

Anne F. Runge; S. Scott Saavedra

doi:10.1021/la0350507

Comparison of Microcontact-Printed and Solution-Adsorbed Cytochrome c Films on Indium Tin Oxide Electrodes

Anne F. Runge, S. Scott Saavedra

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

Three different methods for preparing cytochrome c (cyt c) films on planar indium tin oxide (ITO) electrodes have been characterized and compared using electrochemical and surface spectroscopy methods. Protein films formed by adsorption of dissolved cyt c and by microcontact printing with both hydrophobic and hydrophilic poly(dimethylsiloxane) (PDMS) stamps are compared in terms of the total and electrochemical surface coverage, standard reduction potential, and rate of direct electron transfer with the ITO surface. Plasma treatment of the PDMS stamps, which renders them hydrophilic, dramatically increases the surface coverage of printed films to a level comparable to that of films formed by adsorption of dissolved cyt c. Their electrochemical properties are also very similar. This work is the first report of the direct electrochemical activity in a metalloprotein film formed by microcontact printing on an electrode surface.

Original language	English (US)
Pages (from-to)	9418-9424
Number of pages	7
Journal	Langmuir
Volume	19
Issue number	22
DOIs	https://doi.org/10.1021/la0350507
State	Published - Oct 28 2003
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la0350507

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abstract = "Three different methods for preparing cytochrome c (cyt c) films on planar indium tin oxide (ITO) electrodes have been characterized and compared using electrochemical and surface spectroscopy methods. Protein films formed by adsorption of dissolved cyt c and by microcontact printing with both hydrophobic and hydrophilic poly(dimethylsiloxane) (PDMS) stamps are compared in terms of the total and electrochemical surface coverage, standard reduction potential, and rate of direct electron transfer with the ITO surface. Plasma treatment of the PDMS stamps, which renders them hydrophilic, dramatically increases the surface coverage of printed films to a level comparable to that of films formed by adsorption of dissolved cyt c. Their electrochemical properties are also very similar. This work is the first report of the direct electrochemical activity in a metalloprotein film formed by microcontact printing on an electrode surface.",

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AB - Three different methods for preparing cytochrome c (cyt c) films on planar indium tin oxide (ITO) electrodes have been characterized and compared using electrochemical and surface spectroscopy methods. Protein films formed by adsorption of dissolved cyt c and by microcontact printing with both hydrophobic and hydrophilic poly(dimethylsiloxane) (PDMS) stamps are compared in terms of the total and electrochemical surface coverage, standard reduction potential, and rate of direct electron transfer with the ITO surface. Plasma treatment of the PDMS stamps, which renders them hydrophilic, dramatically increases the surface coverage of printed films to a level comparable to that of films formed by adsorption of dissolved cyt c. Their electrochemical properties are also very similar. This work is the first report of the direct electrochemical activity in a metalloprotein film formed by microcontact printing on an electrode surface.

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Comparison of Microcontact-Printed and Solution-Adsorbed Cytochrome c Films on Indium Tin Oxide Electrodes

Abstract

ASJC Scopus subject areas

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