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Characterisation of ZnO NPs as contrast agents for MWI

Research output: Chapter in Book/Report/Conference proceedingOther chapter contribution

Original languageEnglish
Title of host publicationProceedings of the 2017 19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1021-1024
Number of pages4
ISBN (Electronic)9781509044511
DOIs
Publication statusPublished - 11 Oct 2017
Event19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017 - Verona, Italy
Duration: 11 Sep 201715 Sep 2017

Conference

Conference19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017
CountryItaly
CityVerona
Period11/09/201715/09/2017

King's Authors

Abstract

This study presents the examination of zinc oxide (ZnO) nanoparticles (NPs) as potential contrast agents for microwave imaging (MWI). Polyethylene Glycol (PEG) with varying molecular weights (Mw) have been used to coat NPs. Characterisation of the colloidal dispersions have been recorded using Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM), Dynamic Light Scattering (DLS), and Ultraviolet-Visible spectroscopy (UV-Vis). The dielectric characterisation of the aqueous colloidal suspensions was recorded over the microwave frequency range between 1-4 GHz, to assess effective contrast for microwave breast imaging applications. Our data shows zinc oxide NPs increase dielectric constant compared to the background medium. The PEGylation process further improved the suspension stability, which was confirmed by DLS and UV-Vis. ZnO-PEG achieved a significant increase in the dielectric constant and the increase was dependent on the different molecular weights of PEG.

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