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Negative differential resistance in ZnO coated peptide nanotube |
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| Authors: | Daeha Joung Luona Anjia Hiroshi Matsui Saiful I. Khondaker |
| Affiliation: | 1. Nanoscience Technology Center, University of Central Florida, Orlando, FL, 32826, USA 2. Department of Physics, University of Central Florida, Orlando, FL, 32826, USA 3. Department of Chemistry, Hunter College, City University of New York, New York, NY, 10065, USA 4. School of Electrical Engineering and Computer Science, University of Central Florida, Orlando, FL, 32826, USA |
| Abstract: | We investigate the room temperature electronic transport properties of a zinc oxide (ZnO) coated peptide nanotube contacted with Au electrodes. Current–voltage (I–V) characteristics show asymmetric negative differential resistance (NDR) behavior along with current rectification. The NDR phenomenon is observed in both negative and positive voltage sweep scans, and found to be dependent on the scan rate and humidity. Our results suggest that the NDR is due to protonic conduction arising from water molecule redox reaction on the surface of ZnO coated peptide nanotubes rather than the conventional resonant tunneling mechanism. |
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