Preparation of Microscale Polymer Janus Particles by Sandwich Microcontact Printing
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Abstract
Sandwich microcontact printing provides a straightforward way to obtain Janus polymer particles by postfunctionalization. In this paper, the synthesis of poly(glycidylmethacrylate‐ co ‐divinylbenzene) [poly(GMA‐co‐DVB)] particles with a diameter below 3 μm by precipitation polymerization with narrow size distribution and GMA content up to 70% is presented. Infrared spectra show the increasing GMA content of the particles. Successful functionalization of Janus particles with A‐B, A‐B‐A, and A‐B‐C structure by sandwich microcontact printing is demonstrated by printing low‐molecular‐weight fluorescent inks such as dansylcadaverine and rhodamine onto the particles in well‐defined and homogeneous patches. Under optimized conditions, Janus particles with a diameter of 2 μm are accessible in a single printing step. image
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