High sensitivity of a carbon nanowall-based sensor for detection of organic vapours

0449154 - ÚH 2016 RIV GB eng J - Journal Article
Slobodian, P. - Cvelbar, U. - Říha, Pavel - Olejník, R. - Matyáš, J. - Filipič, G. - Watanabe, H. - Tajima, S. - Kondo, H. - Sekine, M. - Hori, M.
High sensitivity of a carbon nanowall-based sensor for detection of organic vapours.
RSC Advances. Roč. 110, č. 5 (2015), s. 90515-90520. E-ISSN 2046-2069
Grant - others:Ministerstvo školství, mládeže a tělovýchovy (MŠMT)(CZ) LO1504; Slovenian Research Agency(SI) L2-6769; Slovenian Research Agency(SI) Bi-JAP-2015-2017-3; JSPS Grant-in-Aid for Exploratory Research(JP) 25600123
Institutional research plan: CEZ:AV0Z20600510
Institutional support: RVO:67985874
Keywords : carbon nanowalls * sensing properties * volatile organic vapours
OECD category: Electrical and electronic engineering
Impact factor: 3.289, year: 2015

The high sensitivity in response, selectivity and reversibility was achieved on a carbon nanowall-based sensor for the vapor detection of volatile organic compounds, which were tested by an electrical resistance method during adsorption and desorption cycles. The maze-like structure of two different carbon nanowalls with wall-to-wall distances of 100 nm and 300 nm were prepared on a silicone substrate by a plasma-enhanced chemical vapor deposition system while varying processing parameters. Four organic vapors: iso-pentane; diethyl ether; acetone; and methanol; were selected in order to evaluate the relationship between the change in resistance, molecular weight of the adsorbent and the polarity. The results show that the carbon nanowalls with average wall distance 100 nm exhibit substantially enhanced electrical response to all volatile organic compound vapors used in comparison with the nanowalls with 300 nm wall distance as well as entangled multiwall carbon nanotube networks.
Permanent Link: http://hdl.handle.net/11104/0250726