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An In Situ Grazing Incidence X‐Ray Scattering Study of Block Copolymer Thin Films During Solvent Vapor Annealing
Author(s) -
Gu Xiaodan,
Gunkel Ilja,
Hexemer Alexander,
Gu Weiyin,
Russell Thomas P.
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201302562
Subject(s) - materials science , copolymer , solvent , annealing (glass) , scattering , in situ , thin film , grazing incidence small angle scattering , chemical engineering , morphology (biology) , polymer chemistry , composite material , optics , nanotechnology , small angle neutron scattering , organic chemistry , polymer , neutron scattering , chemistry , physics , engineering , biology , genetics
In situ grazing‐incidence small‐angle X‐ray scattering experiments on thin films of block copolymers during annealing in neutral solvent vapors are reported. By removing the solvent in a controlled manner, the period of the microphase separated morphology is found to increase with increasing block copolymer concentration in a power law manner with an exponent ∼ 2/3. By venting the systems at different rates during the solvent removal process, kinetically arresting the system, the period of the microphase separated morphology in the dried film can be varied.