Jump to main content
Jump to site search

Issue 1, 2011
Previous Article Next Article

Direct evidence of ZnO morphology modification via the selective adsorption of ZnO-binding peptides

Author affiliations

Abstract

Biomolecule-mediated ZnO synthesis has great potential for the tailoring of ZnO morphology for specific application in biosensors, window materials for display and solar cells, dye-sensitized solar cells (DSSCs), biomedical materials, and photocatalysts due to its specificity and multi-functionality. In this contribution, the effect of a ZnO-binding peptide (ZnO-BP, G-12: GLHVMHKVAPPR) and its GGGC-tagged derivative (GT-16: GLHVMHKVAPPRGGGC) on the growth of ZnO crystals expressing morphologies dependent on the relative growth rates of (0001) and (10[1 with combining macron]0) planes of ZnO have been studied. The amount of peptide adsorbed was determined by a depletion method using oriented ZnO films grown by Atomic Layer Deposition (ALD), while the adsorption behavior of G-12 and GT-16 was investigated using XPS and a computational approach. Direct evidence was obtained to show that (i) both the ZnO-BP identified by phage display and its GGGC derivative (GT-16) are able to bind to ZnO and modify crystal growth in a molecule and concentration dependent fashion, (ii) plane selectivity for interaction with the (0001) versus the (10[1 with combining macron]0) crystal planes is greater for GT-16 than G-12; and (iii) specific peptide residues interact with the crystal surface albeit in the presence of charge compensating anions. To our knowledge, this is the first study to provide unambiguous and direct quantitative experimental evidence of the modification of ZnO morphology via (selective and non-selective) adsorption–growth inhibition mechanisms mediated by a ZnO-BP identified from phage display libraries.

Graphical abstract: Direct evidence of ZnO morphology modification via the selective adsorption of ZnO-binding peptides

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Jul 2010, accepted on 27 Sep 2010 and first published on 22 Oct 2010


Article type: Paper
DOI: 10.1039/C0JM02124E
Citation: J. Mater. Chem., 2011,21, 80-89
  •   Request permissions

    Direct evidence of ZnO morphology modification via the selective adsorption of ZnO-binding peptides

    M. Liang, O. Deschaume, S. V. Patwardhan and C. C. Perry, J. Mater. Chem., 2011, 21, 80
    DOI: 10.1039/C0JM02124E

Search articles by author

Spotlight

Advertisements