NMR study of InP quantum dots: Surface structure and size effects

M. Tomaselli, J. L. Yarger, M. Bruchez, R. H. Havlin, D. De Graw, A. Pines, A. P. Alivisatos

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Abstract

We report the results of 31P NMR measurements on trioctylphosphine oxide (TOPO) passivated InP quantum dots. The spectra show distinct surface-capping sites, implying a manifold of crystalligand bonding configurations. Two In31P surface components are resolved and related to different electronic surroundings. With decreasing particle size the In 31P core resonance reveals an increasing upfield chemical shift related to the overall size dependence of the InP electronic structure.

Original languageEnglish (US)
Pages (from-to)8861-8864
Number of pages4
JournalJournal of Chemical Physics
Volume110
Issue number18
DOIs
StatePublished - May 8 1999
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Tomaselli, M., Yarger, J. L., Bruchez, M., Havlin, R. H., De Graw, D., Pines, A., & Alivisatos, A. P. (1999). NMR study of InP quantum dots: Surface structure and size effects. Journal of Chemical Physics, 110(18), 8861-8864. https://doi.org/10.1063/1.478858