Less is more when forming gels by dilution
Less is more when forming gels by dilution
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通过稀释形成凝胶时少即是多
DOI：
10.1126/science.abo7656
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发表时间：
2022
期刊：
影响因子：
56.9
通讯作者：
Webber, Matthew J.
中科院分区：
文献类型：
--
作者：
Webber, Matthew J.
根据环境或用户施加的刺激改变形式或功能的软材料具有广泛的生物医学应用。凝胶可以在水中由弱相互作用的分子形成，但可以在分子浓度或施加的温度变化时返回到流动的液体悬浮液的状态，称为溶胶。这种行为被称为重入相变。凝胶-溶胶相变通常由浓度降低引起，这意味着凝胶在稀释时变成溶胶，而溶胶在浓度增加时变成凝胶。在本期的第213页，Suet等人展示了一种体系，该体系在稀释时表现出溶胶-凝胶转变，从而逆转了凝胶的常见行为。他们的观察提供了对生物学中经历可重入相变的系统的深入了解。
Soft materials that change form or function in response to environmental or user-applied stimuli have a wide range of biomedical applications . Gels can form in water from weakly interacting molecules but can return to the state of a flowing liquid suspension, known as a sol, upon changes in the concentration of the molecules or the applied temperature. This behavior is known as a reentrant phase transition. A gel-to-sol phase transition typically arises from a reduction in concentration, meaning that a gel becomes a sol upon dilution and a sol becomes a gel with increased concentration. On page 213 of this issue, Suet al.demonstrate a system that exhibits a sol-to-gel transition when diluted, inverting the common behavior of gels. Their observations offer insight into systems that undergo reentrant phase transitions in biology.
影响因子：
3.4
作者：
Jacobs, William M.;Frenkel, Daan
通讯作者：
Frenkel, Daan