2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

In-Situ Lift-Out Fabrication and Characterizations of ZnO Branched Nanorods - Based Nanosensors

O. Lupan, G. Chai and L. Chow
University of Central Florida, US

Keywords:
ZnO branched nanorods, ZnO nanoarchitectures, nanosensor, in-situ lift-out technique

Abstract:
Extensive efforts and synthesis routes are currently devoted to the controlled growth of ZnO nanoarchitectures as building blocks in nanodevices. Most reported techniques are complicated, time and energy consuming, and not environmentally friendly. We report a novel inexpensive and fast synthesis method for ZnO one-dimensional-1D branched nanorods, two-dimensional-2D, and three-dimensional-3D-nanoarchitectures use an aqueous solution route in a reactor and rapid thermal processing. Our 1D, 2D and 3D nano/microrods can be easily transferred to other substrates opening the possibility of studying the assembly of different functional units in novel nanodevices, nanosensors and single crystal logic nanogates. Proposed technology is also starting work on nano/microrod p-n junctions’ fabrication for optoelectronic devices. According to our experimental results, the obtained branched architectures can be transferred to other substrates, can be handled by focused ion beam (FIB) in-situ lift-out technique, or others, in order to fabricate different nanodevices. We present a novel sensors fabricated by in-situ lift-out technique in the FIB system. Also are presented an individual crosses and tripod picked-up the in-situ lift-out needle in the FIB and fabricated different shaped-nanosensors. For obtained nanosensors was investigated the gas sensitivity to H2, O2, oxygen partial pressure, UV light sensitivity, relative humidity, alcohol and ammonia gases.

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