Surface restructuring of nanoparticles affects charge separation

Tijana Rajh, Nada M. Dimitrijevic, Elena A. Rozhkova, Linda De La Garza

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

Abstract

Semiconductor photocatalysis using nanoparticlate TiO2 has proven to be a promising technology for use in photocatalytic reactions, in the cleanup of water, or as a photoactive material in nanocrystalline solar cells. We have found that reconstructed surface of metal oxide nanoparticles differs form the bulk by the presence of highly reactive under-coordinated surface. This can be viewed as a curse or as an opportunity. The under-coordinated surface metal atoms trap light-induced charges, but also exhibit high affinity for oxygen-containing ligands. As a result of this strong interaction, delocalized bands of metal oxide nanoparticles are electronically coupled to organic linkers, improving their optical properties in the visible region and photovoltaic response due to enhanced charge separation across nanoparticle interface. In the same manner we use photoinduced charge separation in order to control and manipulate processes within living cells.

Original languageEnglish (US)
Title of host publicationAmerican Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
StatePublished - 2009
Externally publishedYes
Event238th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Washington, DC, United States
Duration: Aug 16 2009Aug 20 2009

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Conference

Conference238th National Meeting and Exposition of the American Chemical Society, ACS 2009
Country/TerritoryUnited States
CityWashington, DC
Period8/16/098/20/09

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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