电场的一维约束和湿度依赖的DNA电导率
One dimensional Confinement of Electric Field and Humidity Dependent DNA Conductivity
摘要：
从理论上研究了DNA组装体电导与相对湿度的关系。根据先前的建议，我们考虑通过DNA分子吸附的水层的离子电导率。湿度的增加导致水层的增长。由于水极化的变化，离子的结合能取决于水层的厚度。由于水中电场的低维限制，这种依赖性在水层厚度较小时非常强。我们发现，离子浓度的相关变化可以解释电导率的六个数量级的增加，相对湿度从0.05增长到0.95
英文摘要：
The dependence of DNA assemblies conductance on relative humidity is investigated theoretically. Following earlier suggestions, we consider the ionic conductivity through the layers of water adsorbed by DNA molecules. The increase in humidity results in a growing water layer. The binding energy of ions depends on the thickness of the water layer due to change in water polarization. This dependence is very strong at smaller thicknesses of water layers due to the low-dimensional confinement of an electric field in water. We show that the associated change in ion concentration can explain the six orders of magnitude increase in conductivity, with relative humidity growing from 0.05 to 0.95
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