Peptide-directed crystal growth modification in the formation of ZnO

Sola-Rabada, A., Liang, M.K., Roe, M.J. and Perry, C.C. ORCID: 0000-0003-1517-468X, 2015. Peptide-directed crystal growth modification in the formation of ZnO. Journal of Materials Chemistry B, 3 (18), pp. 3777-3788. ISSN 2050-750X

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Abstract

Biomolecule-mediated synthesis is fascinating in terms of the level of control and the intricate hierarchical structures of the materials that can be produced. In this study we compare the behavior of a phage display identified peptide, EAHVMHKVAPRP (EM-12) with that of a mutant peptide EAHVCHKVAPRP (EC-12), having additional complexation capability, on the formation of ZnO from solution. The synthesis conditions (Zn(CH3COO)2–NH3 hydrothermal method at 50 °C) were chosen to generate rod-shaped ZnO via layered basic zinc salts (LBZs) as intermediates. Both peptides affected the crystal formation process by moderating the amount of Zn2+ ions in solution (EC12 having a greater effect than EM12) but only EC12 was shown to interact with the solid phase(s) formed during the reaction. Depending on the peptide concentration used, EM-12 was shown to delay and/or suppress ZnO formation. In contrast, additions of EC-12, although leading to the retention of higher levels of Zn2+ ions in solution did not similarly delay the transformation of the intermediate phases to ZnO but were found to dramatically modify the morphology of ZnO crystallites with mushroom shaped crystals being formed. From the results of detailed materials characterization and changes in the morphology observed, the interactions between the peptide(s) and solution and solid state species present during the process of ZnO crystal formation in the presence of EM-12 and EC-12 are proposed.

Item Type: Journal article
Publication Title: Journal of Materials Chemistry B
Creators: Sola-Rabada, A., Liang, M.K., Roe, M.J. and Perry, C.C.
Publisher: Royal Society of Chemistry
Place of Publication: Cambridge
Date: 2015
Volume: 3
Number: 18
ISSN: 2050-750X
Identifiers:
NumberType
10.1039/C5TB00253BDOI
Divisions: Schools > School of Science and Technology
Depositing User: EPrints Services
Date Added: 09 Oct 2015 10:57
Last Modified: 09 Jun 2017 13:45
URI: http://irep.ntu.ac.uk/id/eprint/20638

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