Author ORCID Identifier

Cheyan Xu

Julie N. Renner

Document Type

Article

Publication Date

6-12-2019

Abstract

Interactions of a peptide with polyproline II helical secondary structure with maghemite (iron(III) oxide, Fe2O3) surfaces were characterized using a variety of surface techniques. A quartz crystal microbalance with dissipation was used to measure the hydrated mass and thickness (92 ± 29 ng/cm2 and 0.89 ± 0.27 nm, respectively) of a layer which formed after a sensor coated with Fe2O3 was exposed to the peptide in aqueous solution. The analysis revealed that the peptide formed a stable thin layer on the sensor. X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy of the monolayer were employed to study the relationship between the metal and the peptide. Finally, Fe2O3 nanoparticles were incubated with the peptide, and analysis of the settling and particle size revealed that the presence of the peptide reduced the occurrence of large aggregates in solution.

Keywords

iron(III) oxide, nanoparticles, peptides, polyproline II helix, quartz crystal microbalance with dissipation

Publication Title

ChemistrySelect

Volume

4

Issue

22

First Page

6784

Last Page

6789

Grant

DE-SC0016529

Funder

U.S. Department of Energy, Office of Science, Basic Energy Sciences, Catalysis Science Program;

Rights

This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

Comments

This is the peer reviewed version of the following article: C. N. Loney, S. I. Perez Bakovic, C. Xu, A. Graybill, L. F. Greenlee, J. N. Renner, Interactions of Polyproline II Helix Peptides with Iron(III) Oxide, ChemistrySelect 2019, 4, 6784, which has been published in final form at https://doi.org/10.1002/slct.201901817

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