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Diameter‐Dependence of the Morphology of PS‐ b ‐PMMA Nanorods Confined Within Ordered Porous Alumina Templates
Author(s) -
Sun Yiming,
Steinhart Martin,
Zschech Danilo,
Adhikari Rameshwar,
Michler Goerg H.,
Gösele Ulrich
Publication year - 2005
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400545
Subject(s) - nanorod , materials science , polystyrene , template , methyl methacrylate , copolymer , porosity , morphology (biology) , methacrylate , epoxy , wetting , poly(methyl methacrylate) , composite material , polymer chemistry , chemical engineering , nanotechnology , polymer , biology , engineering , genetics
Abstract Summary: Polystyrene‐ block ‐poly(methyl methacrylate) nanorods were prepared by wetting ordered porous alumina templates. We systematically investigated the diameter‐dependence of their morphologies by varying the pore diameters of the templates from 400 nm down to 25 nm. If the pore diameter exceeds the period of the block copolymer, the pores accommodate a non‐integer number of repeat periods. In case of smaller pores the occurrence of an ordered state could not be unambiguously verified.TEM image of an ultra‐thin slice containing a cross‐section of a polystyrene‐ block ‐poly(methyl methacrylate) nanorod embedded in epoxy resin.