Impact of hydrogen on carrier mobility and concentration in graphene decorated with Pd nanoparticle

Akihito Goto, Go Takeuchi, Ryosuke Yamachi, Takahisa Tanaka, Tsunaki Takahashi, Ken Uchida

研究成果: Conference contribution

1 引用 (Scopus)

抄録

As a candidate of highly-sensitive hydrogen sensors, Palladium (Pd)-decorated graphene sensors have been investigated. Thanks to high reactivity of Pd nanoparticles to hydrogen and high surface-tovolume ratio of two-dimensionally layered graphene, graphene decorated with Pd nanoparticles can be used as a highly sensitive hydrogen sensor. Although the conductivity of Pd-graphene sensor is known to be greatly changed in hydrogen atmosphere, the mechanisms of conductivity change have not been fully understood. In this work, both carrier concentration and mobility in hydrogen are investigated using Hall effect measurement. It is shown that relative change of carrier concentration is greater when carrier concentration is lower. On the other hand, mobility is not systematically changed as a function of carrier concentration. This mobility behavior is attributed to the competition between greater effective mass and shorter screening length at higher carrier concentration. Based on these observations, we develop strategy for achieving high sensitivity in Pd graphene hydrogen sensor.

元の言語English
ホスト出版物のタイトルGraphene and Beyond
ホスト出版物のサブタイトル2D Materials
出版者Electrochemical Society Inc.
ページ7-12
ページ数6
72
エディション14
ISBN(電子版)9781607685395
DOI
出版物ステータスPublished - 2016
イベントSymposium on Graphene and Beyond: 2D Materials - 229th ECS Meeting - San Diego, United States
継続期間: 2016 5 292016 6 2

Other

OtherSymposium on Graphene and Beyond: 2D Materials - 229th ECS Meeting
United States
San Diego
期間16/5/2916/6/2

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Carrier mobility
Graphene
Palladium
Carrier concentration
Nanoparticles
Hydrogen
Sensors
Hall effect
Screening

ASJC Scopus subject areas

  • Engineering(all)

これを引用

Goto, A., Takeuchi, G., Yamachi, R., Tanaka, T., Takahashi, T., & Uchida, K. (2016). Impact of hydrogen on carrier mobility and concentration in graphene decorated with Pd nanoparticle. : Graphene and Beyond: 2D Materials (14 版, 巻 72, pp. 7-12). Electrochemical Society Inc.. https://doi.org/10.1149/07214.0007ecst

Impact of hydrogen on carrier mobility and concentration in graphene decorated with Pd nanoparticle. / Goto, Akihito; Takeuchi, Go; Yamachi, Ryosuke; Tanaka, Takahisa; Takahashi, Tsunaki; Uchida, Ken.

Graphene and Beyond: 2D Materials. 巻 72 14. 編 Electrochemical Society Inc., 2016. p. 7-12.

研究成果: Conference contribution

Goto, A, Takeuchi, G, Yamachi, R, Tanaka, T, Takahashi, T & Uchida, K 2016, Impact of hydrogen on carrier mobility and concentration in graphene decorated with Pd nanoparticle. : Graphene and Beyond: 2D Materials. 14 Edn, 巻. 72, Electrochemical Society Inc., pp. 7-12, Symposium on Graphene and Beyond: 2D Materials - 229th ECS Meeting, San Diego, United States, 16/5/29. https://doi.org/10.1149/07214.0007ecst
Goto A, Takeuchi G, Yamachi R, Tanaka T, Takahashi T, Uchida K. Impact of hydrogen on carrier mobility and concentration in graphene decorated with Pd nanoparticle. : Graphene and Beyond: 2D Materials. 14 版 巻 72. Electrochemical Society Inc. 2016. p. 7-12 https://doi.org/10.1149/07214.0007ecst
Goto, Akihito ; Takeuchi, Go ; Yamachi, Ryosuke ; Tanaka, Takahisa ; Takahashi, Tsunaki ; Uchida, Ken. / Impact of hydrogen on carrier mobility and concentration in graphene decorated with Pd nanoparticle. Graphene and Beyond: 2D Materials. 巻 72 14. 版 Electrochemical Society Inc., 2016. pp. 7-12
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