Electromechanical Actuation and Current-Induced Metastable States in Suspended Single-Crystalline VO 2 Nanoplatelets
2011; American Chemical Society; Volume: 11; Issue: 8 Linguagem: Inglês
10.1021/nl200493k
ISSN1530-6992
AutoresAlexander Tselev, J. D. Budai, Evgheni Strelcov, Jonathan Z. Tischler, Andrei Kolmakov, Sergei V. Kalinin,
Tópico(s)Gas Sensing Nanomaterials and Sensors
ResumoCurrent-induced electromechanical actuation enabled by the metal-insulator transition in VO(2) nanoplatelets is demonstrated. The Joule heating by a sufficient current flowing through suspended nanoplatelets results in formation of heterophase domain patterns and is accompanied by nanoplatelet deformation. The actuation action can be achieved in a wide temperature range below the bulk phase transition temperature (68 °C). The observed current-sustained heterophase domain structures should be interpreted as distinct metastable states in free-standing and end-clamped VO(2) samples. We analyze the main prerequisites for the realization of a current-controlled actuator based on the proposed concept.
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