TY - JOUR
T1 - Development of nanodomain and fractal morphologies in solvent annealed block copolymer thin films
AU - Peng, Juan
AU - Han, Yanchun
AU - Knoll, Wolfgang
AU - Kim, Dong Ha
PY - 2007/7/2
Y1 - 2007/7/2
N2 - We have systematically studied the thin film morphologies of asymmetric polystyrene-block-poly(ethylene oxide) (PS-b-PEO) diblock copolymer subjected to solvent vapors of varying selectivity for the constituent blocks. Upon a short treatment in neutral or PS-selective vapor, the film exhibited a nignly ordered array of hexagonally packed, cylindrical microdomains. In the case of PEO selective vapor annealing, such ordered cylindrical microdomains were not obtained. Instead, fractal patterns on the microscale were observed and their growth processes investigated. Furthermore, hierarchical structures could be obtained if the fractal pattern was exposed to neutral or PS selective vapor.
AB - We have systematically studied the thin film morphologies of asymmetric polystyrene-block-poly(ethylene oxide) (PS-b-PEO) diblock copolymer subjected to solvent vapors of varying selectivity for the constituent blocks. Upon a short treatment in neutral or PS-selective vapor, the film exhibited a nignly ordered array of hexagonally packed, cylindrical microdomains. In the case of PEO selective vapor annealing, such ordered cylindrical microdomains were not obtained. Instead, fractal patterns on the microscale were observed and their growth processes investigated. Furthermore, hierarchical structures could be obtained if the fractal pattern was exposed to neutral or PS selective vapor.
KW - Atomic force microscopy
KW - Fractal patterns
KW - Hierarchical nanostructures
KW - PS-b-PEO block copolymers
KW - Solvent annealing
UR - http://www.scopus.com/inward/record.url?scp=34547862001&partnerID=8YFLogxK
U2 - 10.1002/marc.200700206
DO - 10.1002/marc.200700206
M3 - Article
AN - SCOPUS:34547862001
SN - 1022-1336
VL - 28
SP - 1422
EP - 1428
JO - Macromolecular Rapid Communications
JF - Macromolecular Rapid Communications
IS - 13
ER -