Journal
LANGMUIR
Volume 29, Issue 10, Pages 3320-3327Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la3049136
Keywords
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Funding
- University of Texas at San Antonio
- National Institutes of Health through the National Institute of General Medical Sciences [1SC3GM081085, 2SC3GM081085]
- Research Centers at Minority Institutions [G12MD007591]
- Ministry of Higher Education of Saudi Arabia
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This work describes a simple, versatile, and inexpensive procedure to prepare optically transparent carbon electrodes, using proteins as precursors. Upon adsorption, the protein-coated substrates were pyrolyzed under reductive conditions (5% H-2) to form ultrathin, conductive electrodes. Because proteins spontaneously adsorb to interfaces forming uniform layers, the proposed method does not require a precise control of the preparation conditions, specialized instrumentation, or expensive precursors. The resulting electrodes were characterized by a combination of electrochemical, optical, and spectroscopic means. As a proof-of-concept, the optically transparent electrodes were also used as substrate for the development of an electrochemical glucose biosensor. The proposed films represent a convenient alternative to more sophisticated, and less available, carbon-based nanomaterials. Furthermore, these films could be formed on a variety of substrates, without classical limitations of size or shape.
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