The formation of graphene-titania hybrid films and their resistance change under ultraviolet irradiation

Pengzhan Sun, Renzhi Ma, Minoru Osada, Takayoshi Sasaki, Jinquan Wei, Kunlin Wang, Dehai Wu, Yao Cheng, Hongwei Zhu

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18 Citations (Scopus)

Abstract

We report the fabrication of hybrid films of graphene and monolayer titania using a simple electrostatic self-assembly method. Ultraviolet (UV) responses of the hybrid films based on the graphene-titania structure were investigated. We observed that the resistance of the graphene-titania hybrid increased exponentially with UV irradiation time and decreased exponentially when UV was turned off. Time constants of the order of hundreds of seconds were identified and found to be sensitive to the gas environment of graphene. The UV response as well as the time constant is tunable by varying the number of titania layers. Our results confirmed that UV irradiation played a significant role in the resistance modulation of graphene as well as graphene-titania hybrid films.

Original languageEnglish
Pages (from-to)4518-4523
Number of pages6
JournalCarbon
Volume50
Issue number12
DOIs
Publication statusPublished - 2012 Oct
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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    Sun, P., Ma, R., Osada, M., Sasaki, T., Wei, J., Wang, K., Wu, D., Cheng, Y., & Zhu, H. (2012). The formation of graphene-titania hybrid films and their resistance change under ultraviolet irradiation. Carbon, 50(12), 4518-4523. https://doi.org/10.1016/j.carbon.2012.05.035