Transfer Printing of Spatially Organized Quantum Dots on Chemically Patterned Surface
발표자
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초록
내용
Herein, we demonstrate a simple and unique method to transfer nanometer-scale assembly of quantum dots (QDs) assisted by chemically modified surface for fabrication of high resolution QD-based display. To produce spatial organization of QDs, highly aligned line patterns of poly(tetrafluoroethylene) (PTFE) are fabricated by simply rubbing a PTFE bar on a desired substrate. Then, a monolayer of octadecyltrichlorosilane (OTS) is deposited on the exposed area between PTFE lines. By spin-coating a QD solution, QDs are selectively placed on the OTS layer due to height contrast and surface energy difference between QDs and PTFE lines. For the effective transfer printing, a sacrificial layer is prepared on the QDs assembly. After that, it is confirmed that the only QDs assembly is successfully transferred to target substrates by using commercial adhesive tapes.