Controlled Disordering in Metal-Infiltrated Block Copolymer Lattices
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초록
내용
The unique property of disordered structures to localize wave-like quasiparticles has prompted much research interest in tailoring structural defects. Such disordered lattices could be potentially applied to wave-manipulating nanoscale devices, including random lasers and plasmonic waveguides. However, it is still challenging to reproduce and characterize nanostructures with controlled levels of disorder. In this study, we employ metal-infiltrated block copolymers to alter and quantify the extent of structural disorder. In particular, we adjusted the annealing temperature to introduce defects into a single-grain hexagonal lattice built on a sphere-forming block copolymer thin film. Fine-tuning and broadening of the spectrum of the disorder were achieved by altering the relative ratio of incorporated metal precursors and the blending ratio with homopolymers, respectively. This study potentially offers a platform for engineering disordered systems that could mediate quasiparticle localization.