Journal
CARBON
Volume 48, Issue 13, Pages 3895-3900Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2010.06.055
Keywords
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Funding
- Academy of Finland [123252, 124133]
- RAS
- European project [FP6-033350]
- Academy of Finland (AKA) [124133, 123252, 123252, 124133] Funding Source: Academy of Finland (AKA)
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We report the observation of the electromechanical self-oscillations excited in a vacuum diode with a field emission cathode made of single-wall carbon nanotubes. The mechanical oscillations of the cathode accompanied by the periodic variations of the emission current intensity have been observed under the action of a constant voltage applied between the cathode and the anode of the diode. An empirical model of the phenomenon is proposed. It provides a qualitative agreement of the experimental results and the theoretical predictions. The modeling assuming a common behavior of the electromechanical systems with nano-sized mechanically flexible field emitters has been performed. It has demonstrated a dependence of the oscillation frequency value on the geometrical size of flexible emitters and on the value of voltage applied. This phenomenon opens a way for generation of the high frequency electromagnetic waves by using the electromechanical systems with emitters of nanometer size. (C) 2010 Elsevier Ltd. All rights reserved.
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