Wang Zenan, Hsu Chungen, Wang Xiaogong
Department of Chemical Engineering, Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing, 100084, People's Republic of China.
Sci Rep. 2021 Apr 1;11(1):7327. doi: 10.1038/s41598-021-86794-y.
The well-aligned submicron patterns on surfaces have attracted wide attention from scientific curiosity to practical applications. Understanding their formation and transition is highly desirable for efficient manufacture of the patterns for many usages. Here, we report a unique observation on self-organized topographical transition of submicron pillar array of an azo molecular glass, induced by irradiation with circularly polarized light. During gradual erasure of the patterns upon exposure to the light, which is a property of this material, a new set of pillars unexpectedly emerge with new one in middle of each triangle cell of the original array. The highly regular pillar array with triple area density is formed and finally stabilized in the process, as revealed by thorough investigation reported here. This unusual observation and its rationalization will be of benefit for deep understanding of the light-matter interaction and can be expected to be applied in different areas.
表面排列良好的亚微米图案从科学探索到实际应用都引起了广泛关注。了解它们的形成和转变对于高效制造适用于多种用途的图案非常必要。在此，我们报告了一项独特的观察结果，即通过圆偏振光照射诱导偶氮分子玻璃亚微米柱阵列发生自组织形貌转变。在光照下图案逐渐消失的过程中（这是这种材料的一种特性），在原始阵列每个三角形单元的中间意外地出现了一组新的柱子，同时还有一根新柱子。如本文详细研究所揭示的，在此过程中形成了具有三倍面积密度的高度规则的柱阵列并最终稳定下来。这一不同寻常的观察结果及其合理解释将有助于深入理解光与物质的相互作用，并有望应用于不同领域。
