Imparting sensitivity and selectivity to a gold nanoparticle chemiresistor through thiol monolayer functionalization for sensing acetone.,RSC Advances

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Imparting sensitivity and selectivity to a gold nanoparticle chemiresistor through thiol monolayer functionalization for sensing acetone.
RSC Advances ( IF 3.9 ) Pub Date : 2018-10-18 00:00:00 , DOI: 10.1039/c8ra06137h
Zhenzhen Xie ₁ , Mandapati V Ramakrishnam Raju ₂ , Andrew C Stewart ₂ , Michael H Nantz ₂ , Xiao-An Fu ₁

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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.

中文翻译：

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。

用于检测空气中目标挥发性有机化合物 (VOC) 的基于化学电阻的气体传感器面临着灵敏度和选择性较差以及受到其他成分气体和/或湿度干扰的常见挑战。这项工作表明，用设计的硫醇单层功能化金纳米粒子 (AuNP) 可以提高衍生的 AuNPs 气体传感器的灵敏度和选择性。我们报告了带有脲基序和叔丁基端基的硫醇配体的合成和应用，用于功能化金纳米粒子。与经过测试的市售硫醇功能化 AuNP 相比，使用脲硫醇配体制备的 AuNP 传感器表现出显着增强的丙酮传感能力。该传感器在环境温度和高湿度条件下工作，并表现出传感器响应与分析物浓度的常用对数之间的线性关系。

更新日期：2018-10-18

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