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Custom-Made Morphologies of ZnO Nanostructured Films Templated by a Poly(styrene-block-ethylene oxide) Diblock Copolymer Obtained by a Sol–Gel Technique

Titelangaben

Sarkar, Kuhu ; Rawolle, Monika ; Herzig, Eva M. ; Wang, Weijia ; Buffet, Adeline ; Roth, Stephan V. ; Müller-Buschbaum, Peter:
Custom-Made Morphologies of ZnO Nanostructured Films Templated by a Poly(styrene-block-ethylene oxide) Diblock Copolymer Obtained by a Sol–Gel Technique.
In: ChemSusChem. Bd. 6 (2013) Heft 8 . - S. 1414-1424.
ISSN 1864-564X
DOI: https://doi.org/10.1002/cssc.201300291

Volltext

Link zum Volltext (externe URL): Volltext

Abstract

Zinc oxide (ZnO) nanostructured films are synthesized on silicon substrates to form different morphologies that consist of foamlike structures, wormlike aggregates, circular vesicles, and spherical granules. The synthesis involves a sol–gel mechanism coupled with an amphiphilic diblock copolymer poly(styrene-block-ethylene oxide), P(S-b-EO), which acts as a structure-directing template. The ZnO precursor zinc acetate dihydrate (ZAD) is incorporated into the poly(ethylene oxide) block. Different morphologies are obtained by adjusting the weight fractions of the solvents and ZAD. The sizes of the structure in solution for different sol–gels are probed by means of dynamic light scattering. Thin-film samples with ZnO nanostructures are prepared by spin coating and solution casting followed by a calcination step. On the basis of various selected combinations of weight fractions of the ingredients used, a ternary phase diagram is constructed to show the compositional boundaries of the investigated morphologies. The evolution and formation mechanisms of the morphologies are addressed in brief. The surface morphologies of the ZnO nanostructures are studied with SEM. The inner structures of the samples are probed by means of grazing incidence small-angle X-ray scattering to complement the SEM investigations. XRD measurements confirm the crystallization of the ZnO in the wurtzite phase upon calcination of the nanocomposite film in air. The optical properties of ZnO are analyzed by FTIR and UV/Vis spectroscopy.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Juniorprofessur Experimentalphysik VII - Dynamik und Strukturbildung > Juniorprofessur Experimentalphysik VII - Dynamik und Strukturbildung - Juniorprof. Dr. Eva M. Herzig
Fakultäten
Fakultäten > Fakultät für Mathematik, Physik und Informatik
Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Juniorprofessur Experimentalphysik VII - Dynamik und Strukturbildung
Titel an der UBT entstanden: Nein
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
Eingestellt am: 06 Okt 2017 09:06
Letzte Änderung: 06 Okt 2017 09:06
URI: https://eref.uni-bayreuth.de/id/eprint/39914