凝聚
过饱和度
矿化(土壤科学)
聚合物
亚稳态
降水
化学工程
化学
相(物质)
材料科学
纳米技术
色谱法
有机化学
氮气
气象学
工程类
物理
作者
Hang Zhai,Yuke Fan,Wei Zhang,Neta Varsano,Assaf Gal
出处
期刊:ACS Biomaterials Science & Engineering
[American Chemical Society]
日期:2023-02-01
卷期号:9 (2): 601-607
被引量:3
标识
DOI:10.1021/acsbiomaterials.2c01249
摘要
Multistep mineralization processes are pivotal in the fabrication of functional materials and are often characterized by far from equilibrium conditions and high supersaturation. Interestingly, such 'nonclassical' mineralization pathways are widespread in biological systems, even though concentrating molecules well beyond their saturation level is incompatible with cellular homeostasis. Here, we show how polymer phase separation can facilitate bioinspired silica formation by passively concentrating the inorganic building blocks within the polymer dense phase. The high affinity of the dense phase to mobile silica precursors generates a diffusive flux against the concentration gradient, similar to dynamic equilibrium, and the resulting high supersaturation leads to precipitation of insoluble silica. Manipulating the chemistry of the dense phase allows to control the delicate interplay between polymer chemistry and silica precipitation. These results connect two phase transition phenomena, mineralization and coacervation, and offer a framework to achieve better control of mineral formation.
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