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Beilstein J Nanotechnol

Title:		Multiwalled carbon nanotube based aromatic volatile organic compound sensor: sensitivity enhancement through 1-hexadecanethiol functionalisation
Author(s):		Bohli N; Belkilani M; Casanova-Chafer J; Llobet E; Abdelghani A;
Address:		"Carthage University, National Institute of Applied Science and Technology, Research Unit of Nanobiotechnology and Valorisation of Medicinal Plants UR17ES22, Bp 676, Centre Urbain Nord, 1080 Charguia Cedex, Tunisia. Tunis University, ENSIT, Avenue Taha Hussein, Montfleury, 1008 Tunis, Tunisia. MINOS-EMaS, Universitat Rovira i Virgili, Avda. Paisos Catalans, 26, 43007 Tarragona, Spain"
Journal Title:		Beilstein J Nanotechnol
Year:		2019
Volume:		20191204
Issue:
Page Number:		2364 - 2373
DOI:		10.3762/bjnano.10.227
ISSN/ISBN:		2190-4286 (Print) 2190-4286 (Electronic) 2190-4286 (Linking)
Abstract:		"Aromatic volatile organic compound (VOC) sensors are attracting growing interest as a response to the pressing market need for sensitive, fast response, low power consumption and stable sensors. Benzene and toluene detection is subject to several potential applications such as air monitoring in chemical industries or even biosensing of human breath. In this work, we report the fabrication of a room temperature toluene and benzene sensor based on multiwall carbon nanotubes (MWCNTs) decorated with gold nanoparticles and functionalised with a long-chain thiol self-assembled monolayer, 1-hexadecanethiol (HDT). High-resolution transmission electron microscopy (HRTEM) and Fourier transform infrared spectroscopy (FTIR) were performed to characterize the gold nanoparticle decoration and to examine the thiol monolayer bonding to the MWCNTs. The detection of aromatic vapours using Au-MWCNT and HDT/Au-MWCNT sensors down to the ppm range shows that the presence of the self-assembled layer increases the sensitivity (up to 17 times), selectivity and improves the response dynamics of the sensors"
Keywords:		gold-decorated MWCNTs multiwall carbon nanotubes (MWCNTs) selectivity self-assembled monolayers (SAMs) sensitivity vapour sensor;
Notes:		"PubMed-not-MEDLINEBohli, Nadra Belkilani, Meryem Casanova-Chafer, Juan Llobet, Eduard Abdelghani, Adnane eng Germany 2019/12/31 Beilstein J Nanotechnol. 2019 Dec 4; 10:2364-2373. doi: 10.3762/bjnano.10.227. eCollection 2019"