A hybrid nanostructure array for gas sensing with ultralow field ionization voltage
A hybrid nanostructure array for gas sensing with ultralow field ionization voltage
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DOI：
10.1088/0957-4484/24/17/175301
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发表时间：
2013-05-03
期刊：
影响因子：
3.5
通讯作者：
Huang, Yizhong
中科院分区：
文献类型：
--
作者：
Liu, Hai;Yadian, Boluo;Huang, Yizhong
基于纳米尺度上的极化机制，我们制备了一种独特的用于气体传感的混合纳米结构阵列。结果表明，在每个纳米针的顶部都有铂纳米晶体，这种阵列可以在超低电压(小于10V)下作为场电离气体传感器工作。我们认为，极化的铂带来了局部增强的电场，导致气体分子的直接场电离，这一点从电荷积累和电场分布的计算中得到了证实。
We fabricate a unique hybrid nanostructure array for gas sensing based on the polarization mechanism at the nanoscale. It is shown that with platinum nanocrystallites on the top of each nanoneedle, this array can work at ultralow voltages (less than 10 V) as a field ionization gas sensor. We believe that the polarized platinum brings about a local enhanced electrical field, leading to the direct field ionization of gas molecules, which is confirmed by calculations of the charge accumulation and electrical field distribution.