Multi-Walled Carbon Nanotubes Decorated with Silver Nanoparticles for Acetone Gas Sensing at Room Temperature
Multi-Walled Carbon Nanotubes Decorated with Silver Nanoparticles for Acetone Gas Sensing at Room Temperature
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DOI：
10.1149/1945-7111/abd1be
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发表时间：
2020-12
影响因子：
3.9
通讯作者：
S. Young;Yi-Hsing Liu;Zheng-Dong Lin;Kumkum Ahmed;MD Nahin Islam Shiblee;S. Romanuik;P. Sekhar;T. Thundat;L. Nagahara;S. Arya;Rafiq Ahmed;H. Furukawa;A. Khosla
中科院分区：
文献类型：
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作者：
S. Young;Yi-Hsing Liu;Zheng-Dong Lin;Kumkum Ahmed;MD Nahin Islam Shiblee;S. Romanuik;P. Sekhar;T. Thundat;L. Nagahara;S. Arya;Rafiq Ahmed;H. Furukawa;A. Khosla
多壁碳纳米管（MWCNTs）没有和吸附的银纳米粒子（Ag-NPs），用于检测丙酮蒸气。在SiO2/Si衬底上生长了多壁碳纳米管，并利用电子束蒸发法在其中一些多壁碳纳米管上沉积了银纳米颗粒（NPs）。基于CNT的传感器（具有和不具有NP）的灵敏度随着丙酮蒸气的浓度（50 ppm至800 ppm）而增加，而从具有Ag NP的MWCNT获得灵敏度的大幅上升。带图的多壁碳纳米管，有和没有纳米粒子，进行了分析，以了解气体分子的吸附现象。这项研究是第一个确定这种传感器可以在27 ℃而不是其他地方使用的180 ℃-450 ℃下工作，因此比现有方法具有显着优势。为了研究传感器的可靠性，它们暴露于三个50 ppm丙酮气体循环。这些测试表明，设备的响应保持不变，表明其可靠性。还研究了在100 ppm丙酮蒸气内湿度对MWCNT丙酮传感器的影响，并观察到具有Ag-NP的传感器的稳定性和响应/恢复性能的改善。此外，观察到更高的选择性为Ag涂层传感器对丙酮对各种目标气体（丙酮，乙醇，NO2，氨，丙酮与水）。
Multi-walled carbon nanotubes (MWCNTs) without and with adsorbed silver nanoparticles (Ag-NPs), are used to detect acetone vapour. MWCNTs are grown on SiO 2/Si substrates and silver (Ag) nanoparticles (NPs) are deposited onto some of these MWCNTs using electron beam evaporation method. The sensitivity of CNT based sensors (with and without NPs) increases with the concentration of acetone vapour (50 ppm to 800 ppm) while a substantial rise in sensitivity is obtained from MWCNTs with Ag NPs. Band diagrams of the MWCNTs, with and without NPs, are analyzed to understand the gas molecules adsorption phenomena. This study is the first to establish that such sensors can operate at 27 C rather than the 180 C–450 C used elsewhere, thus offering significant advantages over existing methods. To investigate the sensors' dependability, they're exposed to three cycles of 50 ppm acetone gas. These tests show that the devices' responses remain unchanged, indicating their reliability. The effects of humidity upon MWCNT acetone sensors within 100 ppm of acetone vapour are also studied and improved performance towards stability and response/recovery is observed for the sensors with Ag-NPs. Furthermore, higher selectivity is observed for the Ag-coated sensors for acetone against various target gases (acetone, ethanol, NO 2, ammonia, and acetone with water).