Basic Information

Abstract Number: 640 - 2
Author Name: Greg M Swain - Michigan State University
Session Title: Carbon Materials: Electrochemistry and Beyond
Event Type: Symposia
Event Title: Electroanalytical Performance of Nitrogen-Containing Tetrahedral Amorphous Carbon Thin-Film Electrodes

Presider Name:Greg M SwainCo-Author:Catherine Munson, Romana Jarosova
Affiliation:Michigan State UniversityAffiliation:Michigan State University, Charles University

Date: Monday, March 9, 2015
Start Time: 01:35 PM (Slot #2)
Location: 262

Abstract Content

Carbon materials have been used over the years in energy storage and conversion, chemical analysis and separations. The widespread interest in carbon stems from its low cost, mechanical strength, chemical stability in a variety of environments and diversity of surface chemistry. Nonetheless, advances in the fundamental understanding of the structure of electrified interfaces formed at various carbon materials and how this structure affects adsorption, charge-transfer kinetics and redox reaction mechanisms remain to be gained. This is particularly true for the novel sp3 (diamond) and sp2/sp3 (tetrahedral amorphous carbon) electrodes. A more complete understanding of structure-property relationships will serve as the foundation for the next-generation of electrochemical sensors and detectors with these materials.

We are developing an improved understanding of structure-property relationships of boron-doped nanocrystalline diamond and nitrogen-incorporated tetrahedral amorphous carbon (ta-C:N) thin-film electrodes. ta-C:N is a composite material consisting of sp2 and sp3-bonded carbon. Impurities can be incorporated during growth further adding to their complex structure. These films typically possess 40-60% sp3-bonded carbon. It has been widely used as a protective coating due to its hardness, high wear resistance and low coefficient of friction. The growth temperature for ta-C is usually from 25 to about 100 oC. This means that non-traditional materials, such as plastics, can be used as substrates for deposition. ta-C films generally need to be grown thin (100’s of nanometers) in order to minimize internal stress. Stressed films tend to delaminate from a substrate. We will report on the characterization and basic electrochemical properties of these new electrode materials and highlight some electroanalytical uses (FIA-EC) such as for the detection of the drug, propranolol.