Modeling electrostatic and quantum detection of molecules
Autor: | Vasudevan, S., Walczak, K., Kapur, N., Neurock, M., Ghosh, A. W. |
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Rok vydání: | 2008 |
Předmět: | |
Zdroj: | Vasudevan, S.; Walczak, K.; Kapur, N.; Neurock, M.; Ghosh, A.W., "Modeling Electrostatic and Quantum Detection of Molecules," Sensors Journal, IEEE, vol.8, no.6, pp.857-862, June 2008 |
Druh dokumentu: | Working Paper |
DOI: | 10.1109/JSEN.2008.923264 |
Popis: | We describe two different modes for electronically detecting an adsorbed molecule using a nanoscale transistor. The attachment of an ionic molecular target shifts the threshold voltage through modulation of the depletion layer electrostatics. A stronger bonding between the molecule and the channel, involving actual overlap of their quantum mechanical wavefunctions, leads to scattering by the molecular traps that creates characteristic fingerprints when scanned with a backgate. We describe a theoretical approach to model these transport characteristics. Comment: 11 pages, 5 figures |
Databáze: | arXiv |
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