DWI an der RWTH Aachen e.V., Lehrstuhl für Makromolekulare Materialien und Oberflächen, RWTH Aachen University, D-52056 Aachen, Germany.
Nanoscale. 2012 Dec 7;4(23):7338-45. doi: 10.1039/c2nr32710d.
We developed nanostructured gradient wrinkle surfaces to establish a one-step screening process towards optimal assembly of soft and hard colloidal particles (microgel systems and silica particles). Thereby, we simplify studies on the influence of wrinkle dimensions (wavelength, amplitude) on particle properties and their alignment. In a combinatorial experiment, we optimize particle assembly regarding the ratio of particle diameter vs. wrinkle wavelength and packing density and point out differences between soft and hard particles. The preparation of wrinkle gradients in oxidized top layers on elastic poly(dimethylsiloxane) (PDMS) substrates is based on a controlled wrinkling approach. Partial shielding of the substrate during plasma oxidation is crucial to obtain two-dimensional gradients with amplitudes ranging from 7 to 230 nm and wavelengths between 250 and 900 nm.
我们开发了纳米结构化梯度皱纹表面，以建立一个一步筛选过程，以优化软胶体和硬胶体颗粒（微凝胶系统和二氧化硅颗粒）的组装。由此，我们简化了皱纹尺寸（波长、振幅）对颗粒性质及其排列的影响的研究。在组合实验中，我们针对颗粒直径与皱纹波长和堆积密度的比值优化了颗粒组装，并指出了软、硬颗粒之间的差异。在弹性聚二甲基硅氧烷（PDMS）基底的氧化顶层上制备皱纹梯度是基于可控褶皱方法。在等离子体氧化过程中对基底进行部分屏蔽对于获得从 7 到 230nm 振幅和 250 到 900nm 波长的二维梯度是至关重要的。
