title: An in situ grazing incidence X-ray scattering study of block copolymer thin films during solvent vapor annealing.
abstract: 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.
authors.affiliation: Polymer Science and Engineering Department, University of Massachusetts at Amherst, 120 Governors Drive, Amherst, MA, 01003, USA.
authors.forename: Xiaodan
authors.initials: X
authors.lastname: Gu
authors.forename: Ilja
authors.initials: I
authors.lastname: Gunkel
authors.forename: Alexander
authors.initials: A
authors.lastname: Hexemer
authors.forename: Weiyin
authors.initials: W
authors.lastname: Gu
authors.forename: Thomas P
authors.initials: TP
authors.lastname: Russell
keywords: block copolymers thin film; in situ GISAXS; lateral ordering and solvent removal rates; solvent vapor annealing