Searching. Please wait…
1579
37
171
29274
4420
2604
347
391
Abstract: Over the last two decades, it has been demonstrated that size effects have significant consequences for the atomic arrangements and phase behavior of matter under extreme pressure. Furthermore, it has been shown that an understanding of how size affects critical pressure-temperature conditions provides vital guidance in the search for materials with novel properties. Here, we report on the remarkable behavior of small (under 5 nm) matrix-free Ge nanoparticles under hydrostatic compression that is drastically different from both larger nanoparticles and bulk Ge. We discover that the application of pressure drives surface-induced amorphization leading to Ge-Ge bond overcompression and eventually to a polyamorphic semiconductor-to-metal transformation. A combination of spectroscopic techniques together with ab initio simulations were employed to reveal the details of the transformation mechanism into a new high density phase - amorphous metallic Ge. © 2015 American Chemical Society.
Fuente: Nano Lett. 2015, 15, 7334-7340
Publisher: ACS Publications
Year of publication: 2015
No. of pages: 7
Publication type: Article
DOI: 10.1021/acs.nanolett.5b02627
ISSN: 1530-6984,1530-6992
Publication Url: http://pubs.acs.org/doi/10.1021/acs.nanolett.5b02627
Citations in Google Scholar
Read publication
CORSINI, NICCOLO R. C.
ZHANG, YUANPENG
LITTLE, WILLIAM R.
KARATUTLU, ALI
ERSOY, OSMAN
HAYNES, PETER D.
MOLTENI, CARLA
HINE, NICHOLAS D. M.
IGNACIO HERNANDEZ CAMPO
JESUS ANTONIO GONZALEZ GOMEZ
FERNANDO RODRIGUEZ GONZALEZ
BRAZHKIN, VADIM V.
SAPELKIN, ANDREI
Back