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Graphene Oxide Restricts Growth and Recrystallization of Ice Crystals

文献类型： 外文期刊

作者： Geng, Hongya 1 ; Liu, Xing 2 ; Shi, Guosheng 2 ; Bai, Guoying 1 ; Ma, Ji 4 ; Chen, Jingbo; Wu, Zhuangyuan; Song, Ya 1 ;

作者机构： 1.Chinese Acad Sci, Key Lab Green Printing, Inst Chem, Beijing 100190, Peoples R China

2.Chinese Acad Sci, Shanghai Inst Appl Phys, Div Interfacial Water, Shanghai 201800, Peoples R China

3.Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China

4.Xinjiang Univ, Coll Life Sci & Technol, X

关键词： cryopreservation;Gibbs-Thompson effect;graphene oxide;hydrogen bonds;ice formation

期刊名称：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION （ 影响因子：15.336； 五年影响因子：14.205 ）

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收录情况： SCI

摘要： We show graphene oxide (GO) greatly suppresses the growth and recrystallization of ice crystals, and ice crystals display a hexagonal shape in the GO dispersion. Preferred adsorption of GO on the ice crystal surface in liquid water leads to curved ice crystal surface. Therefore, the growth of ice crystal is suppressed owing to the Gibbs-Thompson effect, that is, the curved surface lowers the freezing temperature. Molecular dynamics simulation analysis reveals that oxidized groups on the basal plane of GO form more hydrogen bonds with ice in comparison with liquid water because of the honeycomb hexagonal scaffold of graphene, giving a molecular-level mechanism for controlling ice formation. Application of GO for cryopreservation shows that addition of only 0.01 wt% of GO to a culture medium greatly increases the motility (from 24.3% to 71.3%) of horse sperms. This work reports the control of growth of ice with GO, and opens a new avenue for the application of 2D materials.

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