journal article·2015-03-01Open access

Resistance switching of epitaxial VO2/Al2O3 heterostructure at room temperature induced by organic liquids

Mengmeng Yang, Yuanjun Yang, Bin Hong, Haoliang Huang, Sixia Hu, Yongqi Dong, Haibo Wang, Hao He, Jiyin Zhao, Xuguang Liu, Zhenlin Luo, Xiaoguang Li, Haibin Zhang, Chen Gao

AIP Advances· Volume 5· Issue 3

Abstract

We studied using organic liquids (cyclohexane, n-butanol, and ethylene glycol) to modulate the transport properties at room temperature of an epitaxial VO2 film on a VO2/Al2O3 heterostructure. The resistance of the VO2 film increased when coated with cyclohexane or n-butanol, with maximum changes of 31% and 3.8%, respectively. In contrast, it decreased when coated with ethylene glycol, with a maximum change of −7.7%. In all cases, the resistance recovered to its original value after removing the organic liquid. This organic-liquid-induced reversible resistance switching suggests that VO2 films can be used as organic molecular sensors.
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Research context

OpenAlex topics: Transition Metal Oxide Nanomaterials · Gas Sensing Nanomaterials and Sensors · Analytical Chemistry and Sensors

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

National Synchrotron Radiation Laboratory & Collaborative Innovation Center of Chemistry for Energy Materials, University of Science and Technology of China 1 , Hefei, Anhui 230026, China

CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China 2 , Hefei, Anhui 230026, China

Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China 3 , Hefei, Anhui 230026, China

Center for Micro- and Nanoscale Research and Fabrication, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China 4 , Hefei, Anhui 230027, China

Funding

fundamental research funds for the central universities · Nature Basic Research Programme of China · National Natural Science Foundation of China · China Postdoctoral Science Foundation · Natural Science Foundation of Anhui Province

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