Imperial College London

Peter Haynes

Faculty of EngineeringDepartment of Materials

Head of Department of Materials
 
 
 
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Contact

 

+44 (0)20 7594 5158p.haynes Website CV

 
 
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Assistant

 

Miss Catherine Graham +44 (0)20 7594 3330

 
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Location

 

201BRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Corsini:2015:10.1021/acs.nanolett.5b02627,
author = {Corsini, NR and Zhang, Y and Little, WR and Karatutlu, A and Ersoy, O and Haynes, PD and Molteni, C and Hine, ND and Hernandez, I and Gonzalez, J and Rodriguez, F and Brazhkin, VV and Sapelkin, A},
doi = {10.1021/acs.nanolett.5b02627},
journal = {Nano Letters},
pages = {7334--7340},
title = {Pressure-Induced Amorphization and a New High Density Amorphous Metallic Phase in Matrix-Free Ge Nanoparticles.},
url = {http://dx.doi.org/10.1021/acs.nanolett.5b02627},
volume = {15},
year = {2015}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - 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.
AU - Corsini,NR
AU - Zhang,Y
AU - Little,WR
AU - Karatutlu,A
AU - Ersoy,O
AU - Haynes,PD
AU - Molteni,C
AU - Hine,ND
AU - Hernandez,I
AU - Gonzalez,J
AU - Rodriguez,F
AU - Brazhkin,VV
AU - Sapelkin,A
DO - 10.1021/acs.nanolett.5b02627
EP - 7340
PY - 2015///
SN - 1530-6992
SP - 7334
TI - Pressure-Induced Amorphization and a New High Density Amorphous Metallic Phase in Matrix-Free Ge Nanoparticles.
T2 - Nano Letters
UR - http://dx.doi.org/10.1021/acs.nanolett.5b02627
UR - http://hdl.handle.net/10044/1/27114
VL - 15
ER -