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Scientific article
English

Selective High-Frequency Mechanical Actuation Driven by the VO2 Electronic Instability

Published inAdvanced materials, vol. 29, no. 35, 1701618
Publication date2017-09-17
First online date2017-07-17
Abstract

Micro- and nano-electromechanical resonators are a fundamental building block of modern technology, used in environmental monitoring, robotics, medical tools as well as fundamental science. These devices rely on dedicated electronics to generate their driving signal, resulting in an increased complexity and size. Here, we present a new paradigm to achieve high-frequency mechanical actuation based on the metal-insulator transition of VO2, where the steep variation of its electronic properties enables to realize high-frequency electrical oscillations. The dual nature of this phase change, which is both electronic and structural, turns the electrical oscillations into an intrinsic actuation mechanism, powered by a small DC voltage and capable to selectively excite the different mechanical modes of a microstructure. Our results pave the way towards the realization of micro- and nano-electro-mechanical systems with autonomous actuation from integrated DC power sources such as solar cells or micro-batteries.

eng
Keywords
  • NEMS
  • VO2
  • Actuators
  • Mechanical oscillators
  • Metal-insulator transitions
Affiliation Not a UNIGE publication
Research group
Citation (ISO format)
MANCA, Nicola et al. Selective High-Frequency Mechanical Actuation Driven by the VO<sub>2</sub> Electronic Instability. In: Advanced materials, 2017, vol. 29, n° 35, p. 1701618. doi: 10.1002/adma.201701618
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Identifiers
ISSN of the journal0935-9648
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