Rectifying Behavior of Electrically Aligned ZnO Nanorods

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• 作者：Oliver Harnack ; Claudia Pacholski ; Horst Weller ; Akio Yasuda ; and Jurina M. Wessels
• 刊名：Nano Letters
• 出版年：2003
• 出版时间：August 2003
• 年：2003
• 卷：3
• 期：8
• 页码：1097 - 1101
• 全文大小：242K
• 年卷期：v.3,no.8(August 2003)
• ISSN：1530-6992

文摘

We report on the electrical alignment of ZnO nanorods and their electrical properties. The ZnO nanorods were wet-chemically synthesized,and their length and diameter were adjusted to about 200-300 nm and 15-30 nm, respectively. The nanorods were deposited onto electrodestructures and directed into 200- to 800-nm-wide electrode gaps by using alternating electric fields at frequencies between 1 and 10 kHz andfield strengths between 10⁶ and 10⁷ V/m. The nanorods align parallel to the electric field lines and make electrical contact with the goldelectrodes. Clear photoresponse to 366-nm ultraviolet light irradiation was demonstrated. The current-voltage characteristics of the alignedrods are strongly nonlinear and asymmetrical, showing rectifying, diode-like behavior and asymmetry factors up to 25 at 3-V bias voltage.