Fraunhofer Institute for Applied Polymer Research IAP, D-14476 Potsdam-Golm, Germany.
Soft Matter. 2018 Mar 28;14(12):2301-2309. doi: 10.1039/c8sm00163d. Epub 2018 Mar 5.
A straightforward approach for the precise multifunctional surface modification of particles with three-dimensional patches using microcontact printing is presented. By comparison to previous works it was possible to not only control the diameter, but also to finely tune the thickness of the deposited layer, opening up the way for three-dimensional structures and orthogonal multifunctionality. The use of PEI as polymeric ink, PDMS stamps for microcontact printing on silica particles and the influence of different solvents during particle release on the creation of functional particles with three-dimensional patches are described. Finally, by introducing fluorescent properties by incorporation of quantum dots into patches and by particle self-assembly via avidin-biotin coupling, the versatility of this novel modification method is demonstrated.
提出了一种使用微接触印刷术对具有三维补丁的颗粒进行精确多功能表面修饰的直接方法。与以前的工作相比，不仅可以控制直径，还可以精细调整沉积层的厚度，为三维结构和正交多功能性开辟了道路。本文介绍了使用 PEI 作为聚合物墨水、PDMS 印章在硅胶颗粒上进行微接触印刷以及在颗粒释放过程中使用不同溶剂对具有三维补丁的功能性颗粒的形成的影响。最后，通过将量子点引入补丁中以产生荧光性质以及通过亲和素-生物素偶联进行颗粒自组装，展示了这种新型修饰方法的多功能性。
