Nanopatterned carbon films with engineered morphology by direct carbonization of UV-stabilized block copolymer films.
Nanopatterned thin carbon films were prepared by direct and expeditious carbonization of the block copolymer polystyrene- block-poly(2-vinylpyridine) (PS- b-P2VP) without the necessity of slow heating to the process temperature and of addition of further carbon precursors. Carbonaceous films having an ordered "dots-on-film" surface topology were obtained from reverse micelle monolayers. The regular nanoporous morphology of PS- b-P2VP films obtained by subjecting reverse micelle monolayers to swelling-induced surface reconstruction could likewise be transferred to carbon films thus characterized by ordered nanopit arrays. Stabilization of PS- b-P2VP by UV irradiation and the concurrent carbonization of both blocks were key to the conservation of the film topography. The approach reported here may enable the realization of a broad range of nanoscaled architectures for carbonaceous materials using a block copolymer ideally suited as a template because of the pronounced repulsion between its blocks and its capability to form highly ordered microdomain structures.
Wang
Yong
Y
Max Planck Institute of Microstructure Physics, Weinberg 2, D-06120 Halle, Germany. yongwang@mpi-halle.de
Liu
Jinquan
J
Christiansen
Silke
S
Kim
Dong Ha
DH
Gösele
Ulrich
U
Steinhart
Martin
M