Naderi Mehr Fatemeh, Grigoriev Dmitry, Heaton Rebecca, Baptiste Joshua, Stace Anthony J, Puretskiy Nikolay, Besley Elena, Böker Alexander
Fraunhofer Institute for Applied Polymer Research IAP, Geiselbergstr. 69, Potsdam, 14476, Germany.
School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
Small. 2020 Apr;16(14):e2000442. doi: 10.1002/smll.202000442. Epub 2020 Mar 17.
A directed attractive interaction between predefined "patchy" sites on the surfaces of anisotropic microcolloids can provide them with the ability to self-assemble in a controlled manner to build target structures of increased complexity. An important step toward the controlled formation of a desired superstructure is to identify reversible electrostatic interactions between patches which allow them to align with one another. The formation of bipatchy particles with two oppositely charged patches fabricated using sandwich microcontact printing is reported. These particles spontaneously self-aggregate in solution, where a diversity of short and long chains of bipatchy particles with different shapes, such as branched, bent, and linear, are formed. Calculations show that chain formation is driven by a combination of attractive electrostatic interactions between oppositely charged patches and the charge-induced polarization of interacting particles.
各向异性微胶体表面上预定义的“补丁”位点之间的定向吸引相互作用，可使它们具备以可控方式自组装的能力，从而构建出复杂度更高的目标结构。朝着所需超结构的可控形成迈出的重要一步，是识别补丁之间的可逆静电相互作用，这种相互作用能使它们彼此对齐。本文报道了利用三明治微接触印刷法制备的带有两个相反电荷补丁的双补丁粒子。这些粒子在溶液中自发自聚集，形成了多种不同形状（如分支状、弯曲状和线性）的双补丁粒子短链和长链。计算结果表明，链的形成是由带相反电荷补丁之间的吸引静电相互作用以及相互作用粒子的电荷诱导极化共同驱动的。
