利用石英晶體微天平探討羧酸官能基化奈米碳材的低濕感測特性

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题名:	利用石英晶體微天平探討羧酸官能基化奈米碳材的低濕感測特性 Low-humidity sensing properties of carboxylic acid functionalizedcarbon nanomaterials measured by a quartz crystal microbalance
作者:	郭獻仁
贡献者:	化學系應用化學碩士班
关键词:	低濕度感測器石英晶體震盪微天平吸附動力學分析
日期:	2014
上传时间:	2014-10-06 13:41:25 (UTC+8)
摘要:	利用石英晶體震盪微天平(quartz crystal microbalance , QCM)探討多壁奈米碳管（MWCNTs）、石墨烯(Graphene）、羧酸官能化多壁奈米碳管（MWCNT-COOH）和氧化石墨烯（GO）薄膜等奈米碳材的低濕特性。利用掃描式電子顯微鏡（SEM）和原子力顯微鏡（AFM），來分析奈米碳材薄膜的表面結構特性。結果發現吸附水蒸氣後的GO 薄膜頻率偏移會大於MWCNT-COOH 薄膜的頻率偏移（特別在低濕度時）。同時利用吸附動力學（結合常數），來說明當多壁碳納米管和石墨烯的表面修飾了官能基團（-COOH）會提高對低濕的靈敏度。 Low-humidity sensing performance of raw multi-walled nanotubes (MWCNTs), graphene and carboxylic acid functionalized MWCNTs (MWCNT-COOH) and graphene oxide (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.
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