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Placement control of nanomaterial arrays on the surface-reconstructed block copolymer thin films.

Authors :
Son JG
Bae WK
Kang H
Nealey PF
Char K
Source :
ACS nano [ACS Nano] 2009 Dec 22; Vol. 3 (12), pp. 3927-34.
Publication Year :
2009

Abstract

We present a control strategy for the facile placement of densely packed nanomaterial arrays (i.e., nanoparticles and nanorods) on surface reconstructed polystyrene-block-poly(methyl methacrylate) thin film patterns. The surface reconstruction of perpendicularly oriented block copolymer thin films, which were produced by a treatment with selective solvent vapors for both blocks, created the topographical nanopatterns with enough height contrast for nanoparticle deposition without the need for additional selective etching of a single block domain. The deposition method of nanomaterials was also optimized, and densely packed one- and two-dimensional nanomaterials arrays in the grooves of the block copolymer film patterns were fabricated efficiently. Then, we demonstrated that height contrast of the surface reconstructed block copolymer films could be reversed by electron beam irradiation resulting in nanomaterial arrays placed at the mesa phase of the nanopatterns. On the basis of this nanomaterial placement control strategy, dual nanomaterial arrays on a single block copolymer pattern were also realized.

Details

Language :
English
ISSN :
1936-086X
Volume :
3
Issue :
12
Database :
MEDLINE
Journal :
ACS nano
Publication Type :
Academic Journal
Accession number :
19916550
Full Text :
https://doi.org/10.1021/nn900914q