August 28, 2007Journal of the American Chemical Society171 citations
View Full PaperSnTe Nanocrystals: A New Example of Narrow-Gap Semiconductor Quantum Dots
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Abstract
A solution-phase synthesis of monodisperse SnTe nanocrystals via the reaction of bisbis(trimethylsilyl)aminotin(II) with trioctylphosphine telluride in oleylamine is demonstrated. The obtained SnTe nanocrystals are single-crystalline particles with a cubic rock-salt crystal structure. The size of the SnTe nanocrystals can be precisely tuned in the range of 4.5−15 nm by tailoring the reaction temperature and stabilizer concentration. These SnTe nanocrystals exhibit size-tunable band gap energies of 0.38−0.8 eV. The narrow size-distributions allow assembling SnTe nanocrystals into 3-dimensional superlattices.