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arXiv 1004.4740cond-mat.mes-hallcond-mat.soft
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离子电流聚焦微米孔产生的局部焦耳热

Localized Joule heating produced by ion current focusing through micron-size holes

V. Viasnoff, U. Bockelmann, A. Meller, H. Isambert, L. Laufer, Y. Tsori

摘要:

我们提供了一个实验证明,在一个微米大小的孔连接两个腔室的离子电流的聚焦可以产生局部温度升高高达$100^\circ$ C与梯度一样大的$1^\circ$ K $μm^{-1}$。我们发现一个很好的协议之间测得的温度分布和有限元为基础的数值计算。我们展示了如何热梯度可用于测量的DNA双链体的完整的熔化配置文件内的区域为40 $μ$ m。使用亚微米孔产生甚至更大的梯度的可能性进行了讨论。

英文摘要:

We provide an experimental demonstration that the focusing of ionic currents in a micron size hole connecting two chambers can produce local temperature increases of up to $100^\circ$ C with gradients as large as $1^\circ$ K$μm^{-1}$. We find a good agreement between the measured temperature profiles and a finite elements-based numerical calculation. We show how the thermal gradients can be used to measure the full melting profile of DNA duplexes within a region of 40 $μ$m. The possibility to produce even larger gradients using sub-micron pores is discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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