Imparting sensitivity and selectivity to a gold nanoparticle chemiresistor through thiol monolayer functionalization for sensing acetone.
Imparting sensitivity and selectivity to a gold nanoparticle chemiresistor through thiol monolayer functionalization for sensing acetone.
复制标题
通过硫醇单层功能化赋予金纳米颗粒化学电阻器传感丙酮的灵敏度和选择性。
DOI：
10.1039/c8ra06137h
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发表时间：
2018
期刊：
影响因子：
3.9
通讯作者：
Fu,Xiao-An
中科院分区：
文献类型：
--
作者：
Xie,Zhenzhen;RamakrishnamRaju,MandapatiV;Stewart,AndrewC;Nantz,MichaelH;Fu,Xiao-An
Chemiresistor-based gas sensors for detection of target volatile organic compounds (VOCs) in air face common challenges of poor sensitivity and selectivity as well as suffering from interference by other constituent gases and/or humidity. This work demonstrates that functionalizing gold nanoparticles (AuNPs) with a designed thiol monolayer improves sensitivity and selectivity of the derived AuNPs gas sensor. We report the synthesis and application of a thiol ligand fitted with both a urea motif and a tert-butyl end group for functionalizing AuNPs. The AuNPs sensor prepared using the urea thiol ligand demonstrated significantly increased acetone sensing in comparison with tested commercially available thiol-functionalized AuNPs. The sensor worked under ambient temperature and high humidity conditions, and demonstrated a linear relationship between the sensor response and the common logarithm of analyte concentration.
