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| - Solvothermal Azide Decomposition Route to GaNNanoparticles, Nanorods, and Faceted Crystallites
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| - We report a straightforward, nonaqueous, solvothermal method for the production ofnanoscale gallium nitride structures. Nanoparticles with spherical and rodlike morphologiesare produced via in situ gallium azide precursor synthesis and decomposition in superheatedtoluene or THF. The solution reaction between gallium chloride and sodium azide producesan insoluble azide precursor that solvothermally decomposes to GaN at temperatures below260 °C. The resulting products are poorly crystalline but thermally stable and crystallize tohexagonal GaN upon annealing at 750 °C. Product morphologies include nanoparticles (ca.50 nm) and nanorods (ca. 300 nm lengths). Upon annealing, the nanoparticles coalesce intolarger organized crystalline structures with hexagonal facets.
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