Publications

Detailed Information

Unidirectionally aligned line patterns driven by entropic effects on faceted surfaces

Cited 0 time in Web of Science Cited 0 time in Scopus
Authors

Hong, Sung Woo; Huh, June; Gu, Xiaodan; Lee, Dong Hyun; Jo, Won Ho; Park, Soojin; Xu, Ting; Russell, Thomas P.

Issue Date
2012-01
Publisher
NATL ACAD SCIENCES
Citation
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA Vol.109 No.5, pp. 1402-1406
Keywords
공학block copolymerdirected self-assemblylong-range orderpattern transfer
Abstract
A simple, versatile approach to the directed self-assembly of block copolymers into a macroscopic array of unidirectionally aligned cylindrical microdomains on reconstructed faceted single crystal surfaces or on flexible, inexpensive polymeric replicas was discovered. High fidelity transfer of the line pattern generated from the microdomains to a master mold is also shown. A single-grained line patterns over arbitrarily large surface areas without the use of top-down techniques is demonstrated, which has an order parameter typically in excess of 0.97 and a slope error of 1.1 deg. This degree of perfection, produced in a short time period, has yet to be achieved by any other methods. The exceptional alignment arises from entropic penalties of chain packing in the facets coupled with the bending modulus of the cylindrical microdomains. This is shown, theoretically, to be the lowest energy state. The atomic crystalline ordering of the substrate is transferred, over multiple length scales, to the block copolymer microdomains, opening avenues to large-scale roll-to-roll type and nanoimprint processing of perfectly patterned surfaces and as templates and scaffolds for magnetic storage media, polarizing devices, and nanowire arrays.
A simple, versatile approach to the directed self-assembly of block
copolymers into a macroscopic array of unidirectionally aligned
cylindrical microdomains on reconstructed faceted single crystal
surfaces or on flexible, inexpensive polymeric replicas was discovered.
High fidelity transfer of the line pattern generated from the
microdomains to a master mold is also shown. A single-grained line
patterns over arbitrarily large surface areas without the use of topdown
techniques is demonstrated, which has an order parameter
typically in excess of 0.97 and a slope error of 1.1 deg. This degree
of perfection, produced in a short time period, has yet to be
achieved by any other methods. The exceptional alignment arises
from entropic penalties of chain packing in the facets coupled with
the bending modulus of the cylindrical microdomains. This is
shown, theoretically, to be the lowest energy state. The atomic
crystalline ordering of the substrate is transferred, over multiple
length scales, to the block copolymer microdomains, opening avenues
to large-scale roll-to-roll type and nanoimprint processing
of perfectly patterned surfaces and as templates and scaffolds for
magnetic storage media, polarizing devices, and nanowire arrays.
ISSN
0027-8424
Language
English
URI
https://hdl.handle.net/10371/81085
DOI
https://doi.org/10.1073/pnas.1115803109/-/DCSupplemental.
Files in This Item:
There are no files associated with this item.
Appears in Collections:

Altmetrics

Item View & Download Count

  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Share