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Abstract(Figure Presented) A nanowire-based nanosensor for detecting biologically and chemically charged molecules that is probe-free and highly sensitive is demonstrated. The device relies on the nonsymmetrical Schottky contact under reverse bias (see figure) and is much more sensitive than the device based on the symmetric ohmic contact. This approach serves as a guideline for designing more practical chemical and biochemical sensors. © 2009 WILEY-VCH Verlag GmbH & Co. KGaA.
CitationYeh P-H, Li Z, Wang ZL (2009) Schottky-Gated Probe-Free ZnO Nanowire Biosensor. Advanced Materials 21: 4975–4978. Available: http://dx.doi.org/10.1002/adma.200902172.
SponsorsP.-H.Y. and Z.L. contributed equally to this work. This research was supported by DARPA (Army/AMCOM/REDSTONE AR, W31P4Q-081-0009), BES DOE (DE-FG02-07ER46394), the Air Force Office (FA9550-08-1-0446), DARPA/ARO W911NF-08-1-0249, the KAUST Global Research Partnership, and NSF (DMS 0706436, CMMI 0403671). Z.L. is grateful for the partial fellowship support from the China Scholarship Council (CSC) (No. 20073020). The authors thank Su Zhang and Fengru Fan for their assistant with the microfluidics.