Low-humidity sensing properties of carbon nanotubes measured by a quartz crystal microbalance

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Title:	Low-humidity sensing properties of carbon nanotubes measured by a quartz crystal microbalance
Authors:	Su, PG (Su, Pi-Guey) Tsai, JF (Tsai, Jia-Fang)
Contributors:	化學系
Keywords:	Low-humidity sensing Quartz crystal microbalance Raw MWCNTs MWCNT-COOH Pd-MWCNT-COOH Adsorption dynamic analysis
Date:	2009-01
Issue Date:	2011-12-09 14:49:59 (UTC+8)
Abstract:	This study investigated the low-humidity sensing performance of raw multi-walled nanotubes (MWCNTs), oxidized MWCNTs (MWCNT-COOH) and Pd-modified MWCNT-COOH (Pd-MWCNT-COOH) thin films by using a quartz crystal microbalance (QCM). The characteristics of the thin films were analyzed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). Water vapor molecules adsorbed onto the Pd-MWCNT-COOH thin film had a larger frequency shift than raw MWCNTs and MWCNT-COOH thin films. Adsorption dynamic analysis, molecular mechanics calculation (association constant), was applied to elucidate how surface modification and functionalization of MWCNTs increase the sensitivity to low-humidity. (c) 2008 Elsevier B.V. All rights reserved.
Relation:	Sensors and Actuators B: Chemical Volume 135, Issue 2,Pages 506–511
Appears in Collections:	[Department of Chemistry & Graduate Institute of Applied Chemistry ] journal articles

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