Abstract
Reaction of the organometallic precursor molecules {[(CH3)3SiCH2]2In-P[Si(CH3)3]2}2 and {[(CH3)3SiCH2]2In-As[Si(CH3)3]2}2 with methanol yielded substantially pure precipitates of the III-V semiconductors InP and InAs. Addition of phenylphosphine or phenylarsine to the reaction mixtures effected “capping” of the growing semiconductor clusters, producing stable and soluble nanoclusters with organic surface groups, e.g. [(CH3)3SiCH2In] x[InP]y[PPh]z. Blue shifted absorption onsets in the optical spectra led to estimated cluster diameters of 55 Å (InP) and 64 Å (InAs). The nanoclusters as prepared were amorphous; however, they crystallized upon heating. Differential scanning calorimetry and X-ray diffraction have been used to characterize the crystallization process. Typical crystallization temperatures were close to 300°C and the associated activation energies ranged from 170 to 240 kJ/mol.
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Bennett, A.M.A., Douglas, T., Unruh, K.M., Shah, S.I., Theopold, K.H. (1994). Synthesis of III-V Semiconductor Particles from Organometallic Precursors. In: Hadjipanayis, G.C., Siegel, R.W. (eds) Nanophase Materials. NATO ASI Series, vol 260. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1076-1_3
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DOI: https://doi.org/10.1007/978-94-011-1076-1_3
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