Generation of strong electric fields in an ice film capacitor.
Generation of strong electric fields in an ice film capacitor.
复制标题
在冰膜电容器中产生强电场。
DOI：
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发表时间：
2013
影响因子：
4.4
通讯作者：
Heon Kang
中科院分区：
文献类型：
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作者：
Sunghwan Shin;Youngsoon Kim;Eui;Du Hyeong Lee;Hani Kang;Heon Kang
我们提出了一种电容型装置，可以产生强的静电场在凝聚相。该装置包括在真空中在冷的金属基底上生长的冰膜，并且该膜通过利用热力学表面能在冰表面上捕获Cs（+）离子而带电。通过使用Kelvin功函数探针测量膜电压和使用IR光谱法测量乙腈的振动斯塔克效应来监测带电膜内的电场。这些测量表明，电场可以增加到104 × 10（8）V m（-1），高于传统的金属板电容器所能达到的。此外，本装置在研究电场对凝聚相分子的影响方面可以提供若干优点，例如在分子尺度上控制样品组成和结构的能力以及在电场下样品的光谱监测。
We present a capacitor-type device that can generate strong electrostatic field in condensed phase. The device comprises an ice film grown on a cold metal substrate in vacuum, and the film is charged by trapping Cs(+) ions on the ice surface with thermodynamic surface energy. Electric field within the charged film was monitored through measuring the film voltage using a Kelvin work function probe and the vibrational Stark effect of acetonitrile using IR spectroscopy. These measurements show that the electric field can be increased to ∼4 × 10(8) V m(-1), higher than that achievable by conventional metal plate capacitors. In addition, the present device may provide several advantages in studying the effects of electric field on molecules in condensed phase, such as the ability to control the sample composition and structure at molecular scale and the spectroscopic monitoring of the sample under electric field.