Electrical Current Switching in Single CdSe Nanorods
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- 作者：Hadar Steinberg ; Omri Wolf ; Adam Faust ; Asaf Salant ; Yigal Lilach ; Oded Millo ; Uri Banin
- 刊名：Nano Letters
- 出版年：2010
- 出版时间：July 14, 2010
- 年：2010
- 卷：10
- 期：7
- 页码：2416-2420
- 全文大小：335K
- 年卷期：v.10,no.7(July 14, 2010)
- ISSN：1530-6992
文摘
Electrical current measurements through individually wired colloidal CdSe nanorods exhibit pronounced multistability. This current switching is analogous to the widely observed fluorescence intermittency in similar systems and may be associated with surface charge dynamics. Such association is quantitatively established for the case when the current is bistable, where the probability of the sojourn time t at the high or low current state follows an exponential dependence. Remarkably, this behavior can be modeled by charging dynamics of a single surface trap, whose position could be estimated from the intermittent current−voltage characteristics. The methodology presented here provides a unique route for charge dynamic sensing at the nanoscale, where the nanorod senses its own surface charge.