An investigation into the feasibility of myoglobin-based single-electron transistors |
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Authors: | Debin Li Peter M Gannett David Lederman |
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Affiliation: | Department of Physics, West Virginia University, Morgantown, WV?26506-6315, USA. |
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Abstract: | Myoglobin single-electron transistors were investigated using nanometer-gap platinum electrodes fabricated by electromigration at cryogenic temperatures. Apomyoglobin (myoglobin without the heme group) was used as a reference. The results suggest single-electron transport is mediated by resonant tunneling with the electronic and vibrational levels of the heme group in a single protein. They also represent a proof-of-principle that proteins with redox centers across nanometer-gap electrodes can be utilized to fabricate single-electron transistors. The protein orientation and conformation may significantly affect the conductance of these devices. Future improvements in device reproducibility and yield will require control of these factors. |
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