NMR study of InP quantum dots

Surface structure and size effects

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

Research output: Contribution to journalArticle

57 Citations (Scopus)

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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Surface structure
Semiconductor quantum dots
quantum dots
Nuclear magnetic resonance
nuclear magnetic resonance
Chemical shift
Electronic structure
chemical equilibrium
Particle size
electronic structure
oxides
configurations
electronics
trioctyl phosphine oxide

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics

Cite this

Tomaselli, M., Yarger, J., 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

NMR study of InP quantum dots : Surface structure and size effects. / Tomaselli, M.; Yarger, Jeffery; Bruchez, M.; Havlin, R. H.; De Graw, D.; Pines, A.; Alivisatos, A. P.

In: Journal of Chemical Physics, Vol. 110, No. 18, 08.05.1999, p. 8861-8864.

Research output: Contribution to journalArticle

Tomaselli, M, Yarger, J, Bruchez, M, Havlin, RH, De Graw, D, Pines, A & Alivisatos, AP 1999, 'NMR study of InP quantum dots: Surface structure and size effects', Journal of Chemical Physics, vol. 110, no. 18, pp. 8861-8864. https://doi.org/10.1063/1.478858
Tomaselli M, Yarger J, Bruchez M, Havlin RH, De Graw D, Pines A et al. NMR study of InP quantum dots: Surface structure and size effects. Journal of Chemical Physics. 1999 May 8;110(18):8861-8864. https://doi.org/10.1063/1.478858
Tomaselli, M. ; Yarger, Jeffery ; Bruchez, M. ; Havlin, R. H. ; De Graw, D. ; Pines, A. ; Alivisatos, A. P. / NMR study of InP quantum dots : Surface structure and size effects. In: Journal of Chemical Physics. 1999 ; Vol. 110, No. 18. pp. 8861-8864.
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