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

doi:10.1016/j.carbon.2012.05.035

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

20 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 language	English
Pages (from-to)	4518-4523
Number of pages	6
Journal	Carbon
Volume	50
Issue number	12
DOIs	https://doi.org/10.1016/j.carbon.2012.05.035
Publication status	Published - 2012 Oct
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)

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10.1016/j.carbon.2012.05.035

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title = "The formation of graphene-titania hybrid films and their resistance change under ultraviolet irradiation",

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.",

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

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T1 - The formation of graphene-titania hybrid films and their resistance change under ultraviolet irradiation

AU - Sun, Pengzhan

AU - Ma, Renzhi

AU - Osada, Minoru

AU - Sasaki, Takayoshi

AU - Wei, Jinquan

AU - Wang, Kunlin

AU - Wu, Dehai

AU - Cheng, Yao

AU - Zhu, Hongwei

PY - 2012/10

Y1 - 2012/10

N2 - 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.

AB - 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.

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

Abstract

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