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(Color online) Fabrication and growth processes for growing bridged nanowires across trenched electrodes.
(Color online) A set of SEM images [(a)–(c)] showing various configurations of as-grown nanowire arrays bridging across electrodes and (d) the corresponding nonlinear and asymmetric current-voltage characteristics.
(Color online) (a) Schematic for the transport measurement. (b) SEM image of the bridged nanowire array. (c) and (d) are, respectively, the room temperature and low temperature curves for the nanowire arrays across electrodes. (e) and (f) are, respectively, a typical multinanowire bridge grown with interfacial grain boundaries and the corresponding nonlinear characteristics of a freestanding twin-type nanowire with one grain boundary.
(Color online) Bridged ZnO nanowire arrays across a nanotrench array with different densities, where (a) and (b) are the most sparse ones, (c) and (d) are the dense ones, and (e) and (f) are the dense ones after removal of the ZnO NWs on the top of the trenches.
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