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Combining Graphoepitaxy and Electric Fields toward Uniaxial Alignment of Solvent-Annealed Polystyrene-b-Poly(dimethylsiloxane) Block Copolymers

  • We report a combined directing effect of the simultaneously applied graphoepitaxy and electric field on the self-assembly of cylinder forming polystyrene-b-poly(dimethylsiloxane) block copolymer in thin films. A correlation length of up to 20 mu m of uniaxial ordered striped patterns is an order of magnitude greater than that produced by either graphoepitaxy or electric field alignment alone and is achieved at reduced annealing times. The angle between the electric field direction and the topographic guides as well as the dimensions of the trenches affected both the quality of the ordering and the direction of the orientation of cylindrical domains: parallel or perpendicular to the topographic features. We quantified the interplay between the electric field and the geometry of the topographic structures by constructing the phase diagram of microdomain orientation. This combined approach allows the fabrication of highly ordered block copolymer structures using macroscopically prepatterned photolithographic substrates.

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Author:Christine C. Kathrein, Wubin Bai, Jean Anne Currivan-Incorvia, George Liontos, Konstantinos Ntetsikas, Apostolos Avgeropoulos, Alexander BökerORCiDGND, Larisa Tsarkova, Caroline A. Ross
ISSN:0897-4756 (print)
ISSN:1520-5002 (online)
Parent Title (English):Chemistry of materials : a publication of the American Chemical Society
Publisher:American Chemical Society
Place of publication:Washington
Document Type:Article
Year of first Publication:2015
Year of Completion:2015
Release Date:2017/03/27
First Page:6890
Last Page:6898
Funder:Fonds der Chemischen Industrie; DAAD (German Academic Exchange Service); DARPA; MARCO; TSMC; Center for Materials Science and Engineering under NSF [DMR1419807]
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
Peer Review:Referiert