Exploring the structure-function relationship in multifunctional nanoparticles

P. S. Casey, C. J. Rossouw, S. Boskovic, KALawrence, T. W. Turney

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

Nanoparticles of ZnO are increasingly being used as a pigment and UV absorber in personal care products (e.g. sunscreens), coatings and paints, predominantly because their absorbance efficiency increases with decreasing particle size. However, whilst protection against UV may be maintained at smaller particle sizes, the rate at which hydroxyl radicals are generated increases, due to the inherent photo-activity of these materials. This paper shows that photoactivity can be reduced (by over an order of magnitude) by doping the material with small amounts metallic cations (<1 atm%). To explore whether or not the dopants have been successfully incorporated within the lattice a new variation of atom location by channelling-enhanced microanalysis (ALCHEMI) has been used. It was found that some dopants were exclusively accommodated on the cation sublattice site, whereas others existed as a foreign phase or decorated the surface. The difference in dopant location may influence consequent photoactivity and other nanoparticle behaviour.

Original languageEnglish
Title of host publication2005 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2005 Technical Proceedings
EditorsM. Laudon, B. Romanowicz
Pages5-8
Number of pages4
Publication statusPublished - 1 Dec 2005
Externally publishedYes
EventNanotechnology Conference and Trade Show (Nanotech) 2005 - Anaheim, California, USA, Anaheim, United States of America
Duration: 8 May 200512 May 2005

Publication series

Name2005 NSTI Nanotechnology Conference and Trade Show - NSTI Nanotech 2005 Technical Proceedings

Conference

ConferenceNanotechnology Conference and Trade Show (Nanotech) 2005
Abbreviated titleNSTI Nanotech 2005
Country/TerritoryUnited States of America
CityAnaheim
Period8/05/0512/05/05

Keywords

  • ALCHEMI
  • Doped nanoparticle
  • Photoactivity
  • Zinc oxide

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