Gas sensing properties and p-type response of ALD TiO2 coated carbon nanotubes

Marichy, Catherine; Donato, Nicola; Latino, Mariangela; Willinger, Marc Georg; Tessonnier, Jean-Philippe; Neri, Giovanni; Pinna, Nicola

doi:10.1088/0957-4484/26/2/024004

アイテム詳細

登録内容を編集ファイル形式で保存

一時保存へ追加

タグ情報を表示リリース履歴を表示詳細要約

公開

学術論文

Gas sensing properties and p-type response of ALD TiO₂ coated carbon nanotubes

MPS-Authors

/persons/resource/persons22243

Willinger, Marc Georg
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

External Resource

There are no locators available

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

フルテキスト (公開)

s1-ln217245-1898982340-1939656818Hwf-1177352601IdV795584858217245PDF_HI0001(1).pdf
(全文テキスト（全般）), 443KB

付随資料 (公開)

There is no public supplementary material available

引用

Marichy, C., Donato, N., Latino, M., Willinger, M. G., Tessonnier, J.-P., Neri, G., & Pinna, N. (2015). Gas sensing properties and p-type response of ALD TiO₂ coated carbon nanotubes. Nanotechnology, 26(2):. doi:10.1088/0957-4484/26/2/024004.

引用: https://hdl.handle.net/11858/00-001M-0000-0023-E710-2

要旨

Amorphous titanium dioxide-coated carbon nanotubes were prepared by atomic layer deposition and investigated as sensing layers for resistive NO² and O² gas sensors. By varying ALD process conditions and CNT structure, heterostructures with different metal oxide grain size, morphology and coating thickness were synthesized. Higher responses were observed with homogeneous and continuous 5.5 nm thick films onto CNTs at an operating temperature of 150 °C, while CNTs decorated with either discontinuous film or TiO² nanoparticles showed a weak response close to the one of device made of bare CNTs. An unexpected p-type behavior in presence of the target gas was
also noticed, independently of the metal oxide morphology and thickness. Based on previous works, hypotheses were made in order to explain the p-type behavior of TiO²/CNT sensors.