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.
| Original language | English |
|---|---|
| Pages (from-to) | 1402-1406 |
| Number of pages | 5 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Volume | 109 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2012 Jan 31 |
| Externally published | Yes |
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Keywords
- Block copolymer
- Directed self-assembly
- Long-range order
- Pattern transfer
ASJC Scopus subject areas
- General
Cite this
Unidirectionally aligned line patterns driven by entropic effects on faceted surfaces. / Hong, Sung Woo; Huh, June; Gu, Xiaodan; Lee, Dong Hyun; Jo, Won Ho; Park, Soojin; Xu, Ting; Russell, Thomas P.
In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 109, No. 5, 31.01.2012, p. 1402-1406.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Unidirectionally aligned line patterns driven by entropic effects on faceted surfaces
AU - Hong, Sung Woo
AU - Huh, June
AU - Gu, Xiaodan
AU - Lee, Dong Hyun
AU - Jo, Won Ho
AU - Park, Soojin
AU - Xu, Ting
AU - Russell, Thomas P.
PY - 2012/1/31
Y1 - 2012/1/31
N2 - 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.
AB - 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.
KW - Block copolymer
KW - Directed self-assembly
KW - Long-range order
KW - Pattern transfer
UR - http://www.scopus.com/inward/record.url?scp=84863116130&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84863116130&partnerID=8YFLogxK
U2 - 10.1073/pnas.1115803109
DO - 10.1073/pnas.1115803109
M3 - Article
C2 - 22307591
AN - SCOPUS:84863116130
VL - 109
SP - 1402
EP - 1406
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
SN - 0027-8424
IS - 5
ER -