Syntheses of Soluble GaN Nanocrystals by a Solution-Phase Reaction

Chia-Chun Chen; Chi-Hui  Liang

doi:10.6180/jase.2002.5.4.04

Syntheses of Soluble GaN Nanocrystals by a Solution-Phase Reaction

$(a) High-resolution transmission electron micrograph of the GaN nanocrystal in a bright field shows cross lattice planes. Diffraction patterns on the left upper corner exhibit the hexagonal structure. (b) High-magnification TEM of the zinc blend-like GaN nanocrystal$

Chia-Chun Chen This email address is being protected from spambots. You need JavaScript enabled to view it.¹ and Chi-Hui Liang²

¹Departments of Chemistry National Taiwan Normal University Taipei, Taiwan 116, R.O.C.
²Center for Condensed Matter Sciences National Taiwan University Taipei, Taiwan 106, R.O.C.

Received: October 8, 2002
Accepted: November 4, 2002
Publication Date: December 1, 2002

Download Citation: ||https://doi.org/10.6180/jase.2002.5.4.04

ABSTRACT

A solution phase synthetic method of colloidal GaN nanocrystals at the low temperature has been reported. The syntheses involve the reaction of gallium chloride and lithium nitride in aromatic type solvents mixed surfactants, trioctylphosphine (TOPO) at the temp- erature below 300 ^o C. The resulting nanocrystals were crystalline and generally spherical with the surfaces passivated by TOPO giving the individual nanocrystals solubility in common organic solvents. The average crystal sizes varied from 50 Å to 200 Å in different reaction conditions. We have confirmed the hexagonal wurzite structure of the GaN naocrystals by transmission electron miwcroscope (TEM), x-ray powder diffraction. The samples were examined the optical emission by an emission spectrometer. The results indicated that the nanocrystals emit photoluminescence at 3.31 eV.

Keywords: Nanocrystals, Gallium Nitride, GaN Nanocrystals, Zinc Blende

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