Synthesis of gallium nitride quantum dots through reactive laser ablation

Timothy J. Goodwin, Valerie J. Leppert, Subhash H. Risbud, Ian M. Kennedy, Howard W H Lee

Research output: Contribution to journalArticle

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Abstract

Nanocrystalline GaN was synthesized through reactive laser ablation of gallium metal in a N2 atmosphere. X-ray diffraction, selected-area electron diffraction, and transmission electron microscopy measurements show that the GaN crystallites are as small as 2 nm in diameter, and follow a log-normal size distribution with a mean particle diameter of 12 nm. Size-selective photoluminescence and photoluminescence excitation spectroscopy reveal a continuous range of blueshifted band-edge emissions and absorptions starting from the bulk value for gallium nitride and continuing to below 300 nm. These results are consistent with a GaN particle size distribution that . encompasses regions above and below the excitonic-Bohr radius of GaN, such that the GaN material shows combined bulk and quantum confined optical properties.

Original languageEnglish (US)
Pages (from-to)3122-3124
Number of pages3
JournalApplied Physics Letters
Volume70
Issue number23
StatePublished - Jun 9 1997

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gallium nitrides
laser ablation
quantum dots
photoluminescence
synthesis
particle size distribution
crystallites
gallium
electron diffraction
optical properties
atmospheres
transmission electron microscopy
radii
diffraction
metals
spectroscopy
excitation
x rays

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Goodwin, T. J., Leppert, V. J., Risbud, S. H., Kennedy, I. M., & Lee, H. W. H. (1997). Synthesis of gallium nitride quantum dots through reactive laser ablation. Applied Physics Letters, 70(23), 3122-3124.

Synthesis of gallium nitride quantum dots through reactive laser ablation. / Goodwin, Timothy J.; Leppert, Valerie J.; Risbud, Subhash H.; Kennedy, Ian M.; Lee, Howard W H.

In: Applied Physics Letters, Vol. 70, No. 23, 09.06.1997, p. 3122-3124.

Research output: Contribution to journalArticle

Goodwin, TJ, Leppert, VJ, Risbud, SH, Kennedy, IM & Lee, HWH 1997, 'Synthesis of gallium nitride quantum dots through reactive laser ablation', Applied Physics Letters, vol. 70, no. 23, pp. 3122-3124.
Goodwin TJ, Leppert VJ, Risbud SH, Kennedy IM, Lee HWH. Synthesis of gallium nitride quantum dots through reactive laser ablation. Applied Physics Letters. 1997 Jun 9;70(23):3122-3124.
Goodwin, Timothy J. ; Leppert, Valerie J. ; Risbud, Subhash H. ; Kennedy, Ian M. ; Lee, Howard W H. / Synthesis of gallium nitride quantum dots through reactive laser ablation. In: Applied Physics Letters. 1997 ; Vol. 70, No. 23. pp. 3122-3124.
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