Giant humidity dependence of conductivity in a single exfoliated titania nanosheet

Journal Article · Mon Apr 21 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4872469· OSTI ID:22262558

Tanaka, Ayaka; Hatakeyama, Kazuto; Oku, Azusa; Matsuzaki, Koji; Saitou, Natsumi ^[1]; Yokoi, Hiroyuki; Taniguchi, Takaaki; Matsumoto, Yasumichi; Hara, Masahiro ^[1]

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1. Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555 (Japan)

We have investigated an in-plane electrical transport in an individual titania nanosheet, which forms a lepidocrocite structure with a few atomic layer thickness. The conductivity in the titania nanosheet varied five orders for the change of the relative humidity from 45% to 95%. The drastic change in the conductivity is due to a sensitive response with respect to water molecules adsorbed on the surface of the two-dimensional nanosheet. The results may open an avenue for nanodevices built from various oxide nanosheets.

• OSTI ID: 22262558
• Journal Information: Applied Physics Letters, Vol. 104, Issue 16; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRIC CONDUCTIVITY
HUMIDITY
NANOSTRUCTURES
THICKNESS
TITANIUM OXIDES