TY - JOUR
T1 - Crystallite-size dependency of the pressure and temperature response in nanoparticles of magnesia
AU - Rodenbough, P.P.
AU - Chan, S.-W.
N1 - Funding Information:
Some of the nanoparticle preparations reported here were assisted by Chengjunyi (Tony) Zheng, Ye (Mike) Wang, Yuxuan Xia, and Jiaqi (Fiona) Xue. The synchrotron studies were completed at Lawrence Berkeley National Lab’s Advanced Light Source, Beamline 12.2.2, with the guidance of Dr. Jinyuan Yan and the assistance of Ye (Mike) Wang and Yuxuan Xia, and Argonne National Lab’s Advanced Photon Source, Beamline 2-ID-D and HP-CAT, with the guidance of Drs. Cai Zhonghou and Stanislav Sinogeikin. Thanks to Misha Lipatov for some assistance with calculations, and to NSF DMR grant # 1206764 for financial support. Some parts of this work appear in the doctoral dissertation of PPR (Rodenbough ).
Publisher Copyright:
© 2017, Springer Science+Business Media B.V.
PY - 2017/7/1
Y1 - 2017/7/1
N2 - We have carefully measured the hydrostatic compressibility and thermal expansion for a series of magnesia nanoparticles. We found a strong variance in these mechanical properties as crystallite size changed. For decreasing crystallite sizes, bulk modulus first increased, then reached a modest maximum of 165 GPa at an intermediate crystallite size of 14 nm, and then decreased thereafter to 77 GPa at 9 nm. Thermal expansion, meanwhile, decreased continuously to 70% of bulk value at 9 nm. These results are consistent to nano-ceria and together provide important insights into the thermal-mechanical structural properties of oxide nanoparticles.
AB - We have carefully measured the hydrostatic compressibility and thermal expansion for a series of magnesia nanoparticles. We found a strong variance in these mechanical properties as crystallite size changed. For decreasing crystallite sizes, bulk modulus first increased, then reached a modest maximum of 165 GPa at an intermediate crystallite size of 14 nm, and then decreased thereafter to 77 GPa at 9 nm. Thermal expansion, meanwhile, decreased continuously to 70% of bulk value at 9 nm. These results are consistent to nano-ceria and together provide important insights into the thermal-mechanical structural properties of oxide nanoparticles.
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85023630071&partnerID=MN8TOARS
U2 - 10.1007/s11051-017-3922-7
DO - 10.1007/s11051-017-3922-7
M3 - Article
VL - 19
JO - Journal of Nanoparticle Research
JF - Journal of Nanoparticle Research
SN - 1388-0764
IS - 7
M1 - 241
ER -