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Title
| - Rationalization of Nanowire Synthesis Using Low-Melting Point Metals
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Abstract
| - In this paper, we provide a theoretical basis using thermodynamic stability analysis for explaining thespontaneous nucleation and growth of a high density of 1-D structures of a variety of materials from low-melting metals such as Ga, In, or Sn. The thermodynamic stability analysis provides a theoretical estimate ofthe extent of supersaturation of solute species in molten metal solvent. Using the extent of maximumsupersaturation, the size and density of critical nucleus were estimated and compared with experimental resultsusing nucleation and growth of Ge nanowires using Ga droplets. The consistency of the proposed model isvalidated with the size and density of the resulting nanowires as a function of the synthesis temperature anddroplet size. Both the experimental evidence and the theoretical model predictions point that the diameters ofthe resulting nanowires decrease with the lowering of synthesis temperatures and that the nucleation densitydecreases with the size of metal droplet diameter and increasing synthesis temperature.
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