| 초록 |
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 SiO2 prepared from diatom, Melosira nummuloides, and the other is synthetic SiO2. Unlike hydro- and hemophobic surface properties of synthetic SiO2, diatom SiO2 exhibits unprecedented superhydrophilicity and even super-hemophilicity. Interestingly, such superhydrophilicity of natural SiO2 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 SiO2 is also an interesting finding, because not all superhydrophilic surfaces show superhemophilicity. For the first time, we demonstrate that super-hemowettability is a new principle for developing micro-powder based hemostatic materials despite exsiting hemorrhaging studies using diatom. |
