Self-organized formation and self-repair of a two-dimensional nanoarray of Ge quantum dots epitaxially grown on ultrathin SiO₂-covered Si substrates

Abstract

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Control of Air-Interface-Induced Perpendicular Nanocylinder Orientation in Liquid Crystal Block Copolymer Films by a Surface-Covering Method

“…This block copolymer forms a highly ordered microphase-separated film with perpendicularly oriented cylindrical PEO domains surrounded by the PMA(Az) matrix having a smectic liquid crystalline phase . The microphase-separated film with the hydrophilic PEO cylinders can be easily applied to numerous block copolymer templating processes due to its amphiphilic properties …”

Tunable Thermal Switch via Order–Order Transition in Liquid Crystalline Block Copolymer

“…Block copolymer (BC) with one-dimensionally oriented cylinder domains has been intensively studied as a candidate of low-cost micro/nanopatterning method − due to the higher controllability of arranging nanostructure than other self-assembled techniques. − Among various kinds of BCs, liquid crystalline BC composed of liquid crystal polymer (LCP) matrix and one-dimensionally oriented cylinder poly­(ethylene oxides) (PEO) domains undergoes an order–order transition at the critical temperature, T tr ; the BC contains one-dimensionally oriented cylinder PEO domains in the range of T < ∼ T tr , whereas it contains sphere domains in the range of T > ∼ T tr . , Furthermore, choosing different types of mesogens in the side chain of LCPs can easily modulate T tr because the order–order transition is driven by cooperative isotropic transition of LCPs, which is related to the component molecules of LCPs. We propose that the order–order transition in response to the environmental T can cause a κ switching with tunable T S .…”