Low-humidity sensing properties of carboxylic acid functionalized carbon nanomaterials measured by a quartz crystal microbalance

被引:21
作者
Su, Pi-Guey [1 ]
Kuo, Xian-Ren [1 ]
机构
[1] Chinese Culture Univ, Dept Chem, Taipei 111, Taiwan
关键词
Low-humidity sensing; Quartz crystal microbalance; MWCNT-COOH; GO; Adsorption dynamic analysis; FIELD-EFFECT TRANSISTORS; RELATIVE-HUMIDITY; COMPOSITE-MATERIAL; GRAPHENE OXIDE; THIN-FILMS; SENSOR; NANOTUBES;
D O I
10.1016/j.sna.2013.10.024
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Low-humidity sensing performance of raw multi-walled nanotubes (MWCNTs),graphene and carboxylic acid functionalized MWCNTs (MWCNT-COOH) and graphene (GO) thin films were investigated by using a quartz crystal microbalance (QCM). The characterizations of the thin films were analyzed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). Water vapor molecules adsorbed onto the GO thin film had a larger frequency shift than the MWCNT-COOH thin film (especially at low humidity levels). Adsorption dynamic analysis, molecular mechanics calculation (association constant), was applied to elucidate how amounts of surface functionalized groups (-COOH) of MWCNTs and graphene increase the sensitivity to low-humidity. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:126 / 132
页数:7
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