期刊
NANOTECHNOLOGY
卷 20, 期 48, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/20/48/485202
关键词
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资金
- EPSRC [GR/S47793/01, D072581/1]
- Engineering and Physical Sciences Research Council [GR/S47793/01, GR/T07459/01] Funding Source: researchfish
We report on the fabrication of nanomechanical devices for shuttling of electrons from one electrode to another. Each device consists of a 20 nm diameter gold nanoparticle embedded within the gap between two gold electrodes. In two different kinds of shuttle-junctions the nanoparticle is attached to the electrodes through either (i) a single layer of 1,8-octanedithiol or (ii) a multilayer of 1-octanethiol molecules. The thiol layers play the role of 'damped springs', such that when a sufficient voltage bias is applied to the junction, the nanoparticle is expected to start oscillating and thereby transferring electrons from one electrode to the other. For both kinds of shuttle-junctions we observed an abrupt increase in the transmitted current above a threshold voltage, which can be attributed to a transition from the stationary to the oscillating regime. The threshold voltage was found to be lower for single-layer shuttle-junctions.
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