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Layer‐by‐layer fabrication of hierarchical structures in sol–gel templated thin titania films
Author(s) -
Perlich J.,
Memesa M.,
Diethert A.,
Metwalli E.,
Wang W.,
Roth S. V.,
Timmann A.,
Gutmann J. S.,
MüllerBuschbaum P.
Publication year - 2009
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200903065
Subject(s) - fabrication , sol gel , materials science , anatase , calcination , scanning electron microscope , layer (electronics) , substrate (aquarium) , chemical engineering , nanostructure , thin film , nanotechnology , grazing incidence small angle scattering , spin coating , copolymer , polymer , scattering , composite material , chemistry , optics , organic chemistry , small angle neutron scattering , photocatalysis , catalysis , alternative medicine , oceanography , pathology , engineering , medicine , geology , neutron scattering , physics
The fabrication of titania nanostructures with hierarchical order of different structural levels is investigated. The nanostructures are prepared with a diblock‐copolymer assisted sol–gel process. By iterative spin‐coating of the solution onto silicon substrates a thin polymer‐nanocomposite film is deposited and transformed to purely anatase titania nanostructures via calcination. In total, this procedure is repeated three times on top of the substrate. The approach is monitored with grazing incidence small angle X‐ray scattering after each fabrication step. With scanning electron microscopy the final hierarchical structure is imaged. From the characterization different structural levels are clearly identified.Preparation of small titania nanogranules on top of much larger sol–gel templated titania granules. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)