In-Situ LP-TEM for Dynamic Molecular Assembly of Rod-Coil Amphiphilic Block Copolymer
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Controlling the block ratio and properties in the self-assembly of rod-coil amphiphilic block copolymers (BCPs) is a potential approach for manipulating nanostructures of uniform shape and size. Direct observation of the materials in their natural solution state is crucial for understanding the assembly mechanism and the association of micelles form and function. Here, we describe a method to induce the formation of micelles of uniform size and shape in rod-coil molecules using liquid-phase transmission electron microscopy (LP-TEM). To this end, we design the molecules that are sensitive to e-beam and crosslinking was induced by controlling the number and position of e-beam sensitizer. Cross-linked rod-coil molecules were formed during LP-TEM imaging, it provides a variety of micelle structures that are targeted depending on the dose rate. Understanding of BCPs assembled in solution will be crucially aided by dose rate control over material formation combined with real-time imaging.