Heidorn Sarah-Charlotta, Lucht Karsten, Bertram Cord, Morgenstern Karina
Institut für Festkörperphysik, Leibniz Universität Hannover , Appelstrasse 2, D-30167 Hannover, Germany.
Lehrstuhl für physikalische Chemie I, Ruhr-Universität Bochum , Universitätsstrasse 150, D-44801 Bochum, Germany.
J Phys Chem B. 2018 Jan 18;122(2):479-484. doi: 10.1021/acs.jpcb.7b03431. Epub 2017 Jun 7.
We observe the transformation of fractal ice islands grown at 96 K to compact ones annealed at 118 K and compare those to compact islands grown directly at 118 K. The low-temperature grown islands form a four bilayer high wetting layer. The annealing causes a crystallization and reshaping of the islands and a substantial increase in height and roughness in particular at higher coverage. Moreover, it leads to a dewetting of the ice film. The islands grown at the higher temperature show qualitative similarities to the annealed ones at smaller nucleation density. However, their orientation with respect to the surface differs by 30° as compared to the annealed islands.
我们观察了在96 K下生长的分形冰岛向在118 K下退火形成的致密冰岛的转变，并将其与直接在118 K下生长的致密冰岛进行比较。低温生长的冰岛形成了一个四层双分子层的高润湿层。退火导致冰岛结晶和重塑，特别是在较高覆盖率下，高度和粗糙度大幅增加。此外，它还导致冰膜的去湿。在较高温度下生长的冰岛在较小的成核密度下与退火后的冰岛表现出定性相似性。然而，与退火后的冰岛相比，它们相对于表面的取向相差30°。
