Imperial College London
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Dr Andrew Cairns

Faculty of Engineering, Department of Materials

Lecturer in Materials Chemistry
 
 
 
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Contact

 

+44 (0)20 7594 9528a.cairns Website

 
 
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Location

 

107Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Cairns:2020:10.1021/acs.jpcc.9b11399,
author = {Cairns, AB and Catafesta, J and Hermet, P and Rouquette, J and Levelut, C and Maurin, D and van, der Lee A and Dmitriev, V and Bantignies, J-L and Goodwin, AL and Haines, J},
doi = {10.1021/acs.jpcc.9b11399},
journal = {The Journal of Physical Chemistry C},
pages = {6896--6906},
title = {Effect of extra-framework cations on negative linear compressibility and high pressure phase transitions: a study of KCd[Ag(CN)2]3},
url = {http://dx.doi.org/10.1021/acs.jpcc.9b11399},
volume = {124},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The negative thermal expansion material potassium cadmium dicyanoargentate, KCd[Ag(CN)2]3, is studied at high pressure using a combination of X-ray single crystal diffraction, X-ray powder diffraction, infrared and Raman spectroscopy, and density functional theory calculations. In common with the isostructural manganese analogue, KMn[Ag(CN)2]3, this material is shown to exhibit very strong negative linear compressibility (NLC) in the crystallographic c direction due to structure hinging. We find increased structural flexibility results in enhanced NLC and NTE properties, but this also leads to two pressure-induced phase transitions—to very large unit cells involving octahedral tilting and shearing of the structure—below 2 GPa. The presence of potassium cations has an important effect on the mechanical and thermodynamic properties of this family, whilst the chemical versatility demonstrated here is of considerable interest to tune unusual mechanical properties for application.
AU  - Cairns,AB
AU  - Catafesta,J
AU  - Hermet,P
AU  - Rouquette,J
AU  - Levelut,C
AU  - Maurin,D
AU  - van,der Lee A
AU  - Dmitriev,V
AU  - Bantignies,J-L
AU  - Goodwin,AL
AU  - Haines,J
DO  - 10.1021/acs.jpcc.9b11399
EP  - 6906
PY  - 2020///
SN  - 1932-7447
SP  - 6896
TI  - Effect of extra-framework cations on negative linear compressibility and high pressure phase transitions: a study of KCd[Ag(CN)2]3
T2  - The Journal of Physical Chemistry C
UR  - http://dx.doi.org/10.1021/acs.jpcc.9b11399
UR  - https://pubs.acs.org/doi/10.1021/acs.jpcc.9b11399
UR  - http://hdl.handle.net/10044/1/77223
VL  - 124
ER  -
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