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Title: Transient laser-annealing-induced mesophase transitions of block copolymer–resol thin films
Authors: Tu, Wei Han
Seah, Geok Leng
Li, Yun
Wang, Xinghui
Tan, Kwan Wee
Keywords: Engineering::Nanotechnology
Science::Chemistry::Organic chemistry::Polymers
Engineering::Materials::Nanostructured materials
Engineering::Materials::Composite materials
Issue Date: 2021
Source: Tu, W. H., Seah, G. L., Li, Y., Wang, X. & Tan, K. W. (2021). Transient laser-annealing-induced mesophase transitions of block copolymer–resol thin films. ACS Polymers Au.
Project: 2018-T1-001-084
Journal: ACS Polymers Au
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 resembling an in-plane body-centered cubic sphere morphology. A clear understanding of hybrid thin film mesophase self-assembly under non-equilibrium laser annealing could open new avenues to introduce novel chemistries and rapidly achieve nanoscale periodic order suitable for the patterning of complex structures, electronics, sensing, and emerging quantum materials.
ISSN: 2694-2453
DOI: 10.1021/acspolymersau.1c00040
Rights: © 2021 The Author(s). Published by American Chemical Society. This is an open-access article distributed under the terms of the Creative Commons Attribution License.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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