Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 20, Issue 2, Pages 331-337Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b915841c
Keywords
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Funding
- NSF [102596]
- Motorola
- US Department of Energy [DE-FG02-07ER46453, DE-FG02-07ER46471]
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Amorphous nanophase germanium can crystallize into a high-energy tetragonal phase (Ge-III/ST12) upon thermal annealing, particularly when prepared by the naphthalide-mediated reduction of GeCl4 and subsequent treatment with t-BuMgCl. The formation of ST12-Ge is typically associated with high pressure, yet the nucleation and coalescence of this phase can be observed by in situ transmission electron microscopy at low pressure and at temperatures well below 200 degrees C, and can persist at temperatures of up to 500 degrees C. The low coalescence temperature of nanophase ST12-Ge suggests its compatibility with applications in direct-print electronics.
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