Palladium nanoparticles decorated single-walled carbon nanotube hydrogen sensor
Palladium nanoparticles decorated single-walled carbon nanotube hydrogen sensor
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DOI：
10.1021/jp067716m
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发表时间：
2007-05-03
影响因子：
3.7
通讯作者：
Myung, Nosang V.
中科院分区：
文献类型：
--
作者：
Mubeen, Syed;Zhang, Ting;Myung, Nosang V.
我们开发了一种简单、经济的制造技术，通过Pd纳米粒子修饰单壁碳纳米管来构建氢纳米传感器。通过改变传感器的合成条件（如Pd电沉积电荷、沉积电位和SWNT网络的初始基线电阻），优化了传感器的传感性能。优化后的传感器对氢气具有优异的传感性能（δ R/R为0.42%/ppm），检出限低至100 ppm，线性响应高达1000 ppm。在室温下，随着氢气浓度的增加，反应时间从几十分钟缩短到几分钟。与干燥空气条件相比，传感器在潮湿空气条件下的恢复时间有所改善。
We developed a simple and cost-effective fabrication technique to construct a hydrogen nanosensor by decorating single-walled carbon nanotubes with Pd nanoparticles. By varying the sensor's synthesis conditions (e.g., Pd electrodeposition charge, deposition potential, and initial baseline resistance of the SWNT network), the sensing performance was optimized. The optimized sensor showed excellent sensing properties toward hydrogen (Delta R/R of 0.42%/ppm) with a lower detection limit of 100 ppm and a linear response up to 1000 ppm(.) The response time decreased from tens of minutes to a few minutes with increasing hydrogen concentration at room temperature. The sensor's recovery time improved under humid air conditions compared to dry air conditions.