R. Křeneka, V. Cimrováb, O. Seifarthc, M. Stamma
aDepartment of Nanostructured Materials, Leibniz Institute of Polymer Research Dresden, Hohe Str. 6, D-01069 Dresden, Germany
bInstitute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského nám. 2, CZ-162 06 Praha 6, Czech Republic
cApplied Physics - Sensor Technologies, Brandenburg University of Technology Cottbus, Konrad Wachsmann Allee 17, D-03046 Cottbus, Germany
Block copolymer nanotemplates possess generally several advantages which make them prospective in optoelectronic applications. They are a cheap systems with high variability potential which includes several kinds of composite chemistry and morphology. If focused on polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) architecture, various additives like low- molecular-weight or polymeric, organic or inorganic, may be incorporated in the self-assembly via hydrogen bonding. However, it is quite difficult to predict behavior of such systems due to several physico-chemical parameters like size, polarity, or stiffness of the additive, in relation to these thin film devices.
On the other hand, there exist organic molecules which provide ordered assemblies with characteristic scale of about 10 nm. Thanks to availability of selective washing, 15¸100 nm thin porous PS-b-P4VP nanotemplates may be prepared on almost any substrate. Limitations mostly arise due to substrate roughness. Such porous matrices may be loaded via electrodeposition, physical vapor deposition, or wet impregnation (when crosslinked with UV). Applicability and potentials of these methods depend on the template aspect ratio, filler affinity to P4VP and adhesion layer. Nonetheless, some valuable precursors and devices for optoelectronics can be developed, like nickel nanorods, very stable chromium nanotemplates, titanium dioxide nanodots or dye- containing assemblies.
We acknowledge the support of the Grant Agency of the Academy of Sciences of the Czech Republic (grant No. IAA4050409) and of the European Network of Excellence Nanofun-Poly.