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

doi:10.1063/1.478858

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 language	English (US)
Pages (from-to)	8861-8864
Number of pages	4
Journal	Journal of Chemical Physics
Volume	110
Issue number	18
DOIs	https://doi.org/10.1063/1.478858
State	Published - May 8 1999
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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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.",

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T2 - Surface structure and size effects

AU - Tomaselli, M.

AU - Yarger, J. L.

AU - Bruchez, M.

AU - Havlin, R. H.

AU - De Graw, D.

AU - Pines, A.

AU - Alivisatos, A. P.

PY - 1999/5/8

Y1 - 1999/5/8

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AB - 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.

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JO - Journal of Chemical Physics

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

Abstract

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