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Diatom Frustule Silica Exhibits Superhydrophilicity and Superhemophilicity.

08:00 EDT 24th March 2020 | BioPortfolio

Summary of "Diatom Frustule Silica Exhibits Superhydrophilicity and Superhemophilicity."

Special surface wettability attracts significant attention. In this study, dramatic differences in wettability are demonstrated for microparticles with the same chemical composition, SiO2. One is natural silica prepared from diatom, Melosira nummuloides, and the other is synthetic silica. We found that surface properties of synthetic silica are hydro- and hemophobic. However, diatom frustule silica exhibits superhydrophilicity and even super-hemophilicity. Interestingly, such superhydrophilicity of natural silica is not solely originated from nanoporous structures of diatom but from the synergy of high density silanol anions and nanoarchitecture. Furthermore, the observation of super-hemophilicity of natural silica is also an interesting finding, because not all superhydrophilic surfaces show superhemophilicity. We demonstrate that super-hemowettability is a fundamental principle for developing micro-powder based hemostatic materials despite existing hemorrhaging studies using diatom.

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Name: ACS nano
ISSN: 1936-086X
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