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Preferential Amorphisation of Ge Nanocrystals in a Silica Matrix

Ridgway, Mark C; de Azevedo, Gustavo; Elliman, Robert; Wesch, W; Glover, Christopher; Miller, R; Llewellyn, David; Foran, Garry J; Hansen, Jeffrey; Nylandsted-Larsen, A


Extended X-ray absorption fine structure and Raman spectroscopies have been used to compare the crystalline-to-amorphous phase transformation in nanocrystalline and polycrystalline Ge. We demonstrate Ge nanocrystals are extremely sensitive to ion irradiation and are rendered amorphous at an ion dose ∼40 times less than that required to amorphise bulk, crystalline standards. This rapid amorphisation is attributed to the higher-energy nanocrystalline structural state prior to irradiation,...[Show more]

CollectionsANU Research Publications
Date published: 2006
Type: Journal article
Source: Nuclear Instruments and Methods in Physics Research: Section B
DOI: 10.1016/j.nimb.2005.08.024


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