光热显微镜下膜间的热传递和Kapitza长度

IF 1.8 4区 生物学 Q3 BIOPHYSICS
Panagis D. Samolis, Michelle Y. Sander, Mi K. Hong, Shyamsunder Erramilli, Onuttom Narayan
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引用次数: 0

摘要

提出了一个解析模型,用于光散射与热传输附近的细胞膜,将一个复杂的系统分为两个拓扑不同的半空间。我们的分析是由振动光热显微镜实验激发的,振动光热显微镜不仅显示出非常高的对比度和分辨率,而且能够提供复杂形态下热传输的无标记局部信息。在第一个Born近似中,推导出的Green函数可以通过周期性激励的幅度和相位检测来重建具有光热对比度的完整3D图像。我们证明了包括Kapitza长度和Kapitza阻力在内的重要基本参数可以从实验中得到。我们的目标是促进高频调制和外差检测的额外实验研究,以便与最近膜系统中热输运性质的理论分子动力学计算联系起来。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Thermal transport across membranes and the Kapitza length from photothermal microscopy

Thermal transport across membranes and the Kapitza length from photothermal microscopy

An analytical model is presented for light scattering associated with heat transport near a cell membrane that divides a complex system into two topologically distinct half-spaces. Our analysis is motivated by experiments on vibrational photothermal microscopy which have not only demonstrated remarkably high contrast and resolution, but also are capable of providing label-free local information of heat transport in complex morphologies. In the first Born approximation, the derived Green’s function leads to the reconstruction of a full 3D image with photothermal contrast obtained using both amplitude and phase detection of periodic excitations. We show that important fundamental parameters including the Kapitza length and Kapitza resistance can be derived from experiments. Our goal is to spur additional experimental studies with high-frequency modulation and heterodyne detection in order to make contact with recent theoretical molecular dynamics calculations of thermal transport properties in membrane systems.

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来源期刊
Journal of Biological Physics
Journal of Biological Physics 生物-生物物理
CiteScore
3.00
自引率
5.60%
发文量
20
审稿时长
>12 weeks
期刊介绍: Many physicists are turning their attention to domains that were not traditionally part of physics and are applying the sophisticated tools of theoretical, computational and experimental physics to investigate biological processes, systems and materials. The Journal of Biological Physics provides a medium where this growing community of scientists can publish its results and discuss its aims and methods. It welcomes papers which use the tools of physics in an innovative way to study biological problems, as well as research aimed at providing a better understanding of the physical principles underlying biological processes.
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