Colloidal chemical synthesis and characterization of InAs nanocrystal quantum dots

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.117605· OSTI ID:286893

Guzelian, A A; Banin, U; Kadavanich, A V; Peng, X; Alivisatos, A P ^[1]

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1. Department of Chemistry, University of California, Berkeley

InAs nanocrystal quantum dots have been prepared via colloidal chemical synthesis using the reaction of InCl{sub 3} and As[Si(CH{sub 3}){sub 3}]{sub 3}. Sizes ranging from 25 to 60 A in diameter are produced and isolated with size distributions of {plus_minus}10{percent}{endash}15{percent} in diameter. The nanocrystals are crystalline and generally spherical with surfaces passivated by trioctylphosphine giving them solubility in common organic solvents. The dots have been structurally characterized by transmission electron microscopy (TEM) and powder x-ray diffraction (XRD) and the optical absorption and emission have been examined. Quantum confinement effects are evident with absorption onsets well to the blue of the bulk band gap and size dependent absorption and emission features. The emission is dominated by band edge luminescence. These quantum dots are particularly interesting as they provide an opportunity to make important comparisons with comparably sized InAs quantum dots synthesized by molecular beam epitaxy techniques. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 286893
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 10 Vol. 69; ISSN 0003-6951; ISSN APPLAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALKYLATING AGENTS
COLLOIDS
CONFINEMENT
ELECTRON MICROSCOPY
INDIUM ARSENIDES
NANOSTRUCTURES
PHOTOLUMINESCENCE
QUANTUM DOTS
SIZE
SYNTHESIS
THIN FILMS