Modeling electrostatic and quantum detection of molecules

Autor:	Vasudevan, S., Walczak, K., Kapur, N., Neurock, M., Ghosh, A. W.
Rok vydání:	2008
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
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
Externí odkaz:	http://arxiv.org/abs/0808.2262 Zobrazit plný text záznamu View this record from Arxiv