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(a) FESEM image of as-synthesized CdS NWs. Scale bar is . (b) TEM image of a single as-synthesized CdS NW. Scale bar is . (c) HRTEM image of the CdS NW depicted in (b). Scale bar is . The inset is the corresponding SAED pattern recorded along the  zone axis. (d) FESEM image of a single NW E-mode MESFET. Scale bar is .
(Color online) Two-terminal curves. The green and blue ones are the curves of a single CdS NW between two contacts with and without a top Au contact, respectively. The black and red ones are the curves measured between source gate and drain gate, where the source and the drain were grounded, respectively.
(Color online) (a) curves with changing from , step by . (b) The (black), (red), and (green) curves . Inset: and curves on an exponential scale.
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