Fernandez-Rodriguez Miguel Angel, Antonopoulou Maria-Nefeli, Isa Lucio
Laboratory of Surface and Interface Physics, Biocolloids and Fluid Physics group, Faculty of Sciences, University of Granada, Campus de Fuentenueva s/n, ES 18071 Granada, Spain.
Laboratory for Soft Materials and Interfaces, Swiss Federal Institute of Technology Zürich, Vladimir-Prelog-Weg 1-5/10, 8093 Zürich, Switzerland.
Soft Matter. 2021 Jan 22;17(2):335-340. doi: 10.1039/d0sm01823f.
Understanding and engineering the self-assembly of soft colloidal particles (microgels) at liquid-liquid interfaces is broadening their use in colloidal lithography. Here, we present a new route to assemble rectangular lattices of microgels at near zero surface pressure relying on the balance between attractive quadrupolar capillary interactions and steric repulsion among the particles at water/oil interfaces. These self-assembled rectangular lattices are obtained for a broad range of particles and, after deposition, can be used as lithography masks to obtain regular arrays of vertically aligned nanowires via wet and dry etching processes.
理解并操控软胶体颗粒（微凝胶）在液-液界面的自组装过程，正在拓展它们在胶体光刻技术中的应用。在此，我们展示了一种新方法，可在接近零表面压力的条件下，依靠水/油界面处颗粒间吸引性四极毛细管相互作用与空间排斥力之间的平衡，组装微凝胶的矩形晶格。对于多种颗粒都能获得这些自组装的矩形晶格，沉积后，它们可用作光刻掩膜，通过湿法和干法蚀刻工艺获得垂直排列的纳米线规则阵列。
