Facile Bottom-Up Assembly of Photonic Micropatterns via Surface-Guided Colloidal Crystallization.

ABSTRACT: Photonic micropatterns derived from colloidal self-assembly are highly sought after for next-generation optical and functional devices. However, achieving high optical quality, spatial precision, and stopband tunability with a simple fabrication process remains challenging due to the limitations of conventional top-down techniques. Here, a bottom-up strategy is reported for fabricating high-resolution photonic micropatterns via regioselective heterogeneous nucleation and crystallization of polystyrene particles, directed by surface-dependent nucleation behavior. On strongly charged glass, nucleation is suppressed, while on weakly charged photoresist surfaces, it is promoted via depletion-mediated attraction. Photoresist micropatterns prepared by standard photolithography enable single-step

SUBMITTER: Jung Y 

PROVIDER: S-EPMC12862745 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature