title: Nanoimprint-induced molecular orientation in semiconducting polymer nanostructures.
abstract: The morphology and orientation of thin films of the polymer poly-3(hexylthiophene)-important parameters influencing electronic and photovoltaic device performance-have been significantly altered through nanoimprinting with 100 nm spaced grooves. Grazing-incidence small-angle X-ray scattering studies demonstrate the excellent fidelity of the pattern transfer, while wide-angle scattering convincingly shows an imprinting-induced π-π reorientation and polymer backbone alignment along the imprinted grooves. Surprisingly, temperature-dependent scattering measurements indicate that the imprinted induced orientation and alignment remain intact even at temperatures where the imprinted topographical features nearly vanish.
authors.affiliation: Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors.forename: Htay
authors.initials: H
authors.lastname: Hlaing
authors.forename: Xinhui
authors.initials: X
authors.lastname: Lu
authors.forename: Tommy
authors.initials: T
authors.lastname: Hofmann
authors.forename: Kevin G
authors.initials: KG
authors.lastname: Yager
authors.forename: Charles T
authors.initials: CT
authors.lastname: Black
authors.forename: Benjamin M
authors.initials: BM
authors.lastname: Ocko