Transient Laser-Annealing-Induced Mesophase Transitions of Block Copolymer-Resol Thin Films.

ABSTRACT: Block copolymer self-assembly-derived thin films provide direct access to two- and three-dimensional periodically ordered mesostructures as enablers for many nanotechnology applications. This report describes laser-annealing-induced disorder-order mesophase transitions of polystyrene-block-poly(ethylene oxide)/resol hybrid thin films over a range of laser temperatures (∼45 to 525 °C) and short dwell times (0.25 to 100 ms), revealing the non-equilibrium ordering and disordering kinetics and behaviors. We found that a combination of transient laser temperature of ∼275 °C and annealing dwell time of 100 ms provided the most optimal kinetic and thermodynamic control of the diffusivities of hybrid mesophases and photothermal-induced resol polymerization, yielding long-range ordered films

SUBMITTER: Tu WH 

PROVIDER: S-EPMC9954231 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature