論文

査読有り 国際誌
2020年2月13日

Quantitative Analysis of Membrane Surface and Small Confinement Effects on Molecular Diffusion.

The journal of physical chemistry. B
  • Chiho Watanabe
  • ,
  • Yuta Kobori
  • ,
  • Johtaro Yamamoto
  • ,
  • Masataka Kinjo
  • ,
  • Miho Yanagisawa

124
6
開始ページ
1090
終了ページ
1098
記述言語
英語
掲載種別
DOI
10.1021/acs.jpcb.9b10558

Molecular behaviors in small liquid droplets (picoliter scale), such as phase transitions and chemical reactions, are essential for the industrial application of small droplets and their use as artificial cells. However, the droplets often differ from those in bulk solutions (milliliter scale). Since the droplet size is much larger than the molecular size, the so-called size effect that draws these differences has attracted attention as a target to be solved. Although the small volume and the membrane surface surrounding the droplet are thought to be the origin of the size effect, there were little attempts to separate and quantify them. To solve the problem, we develop a series of systems for the evaluation. Using these systems, we have evaluated the size effect of concentrated polymer solutions on molecular diffusion by dividing it into small volume and membrane surface contributions. Our results demonstrate that the size effect on the molecular diffusion originates from the long-range interaction with the surface enhanced with decreasing volume. The quantitative size effect revealed by the systems provides novel insights in the biophysical understanding of molecular behaviors in cells and to the regulation and design of micrometer-sized materials.

リンク情報
DOI
https://doi.org/10.1021/acs.jpcb.9b10558
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/31939302

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