Electromechanical actuation and current-induced metastable states in suspended single-crystalline VO2 nanoplatelets

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Nano Letters

DOI:https://doi.org/10.1021/nl200493k· OSTI ID:1021982

Tselev, Alexander ^[1]; Budai, John D ^[1]; Strelcov, Evgheni ^[2]; Tischler, Jonathan Zachary ^[1]; Kolmakov, Andrei ^[2]; Kalinin, Sergei V ^[1]

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1. ORNL
2. Southern Illinois University

Current-induced electromechanical actuation enabled by the metal-insulator transition in VO{sub 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{sub 2} samples. We analyze the main prerequisites for the realization of a current-controlled actuator based on the proposed concept.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1021982
• Journal Information: Nano Letters, Vol. 11, Issue 8; ISSN 1530--6984
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ACTUATORS
CURRENTS
DEFORMATION
DOMAIN STRUCTURE
JOULE HEATING
METASTABLE STATES
NANOSTRUCTURES
PHASE TRANSFORMATIONS
TEMPERATURE RANGE
TRANSITION TEMPERATURE
VANADIUM OXIDES