An Ab Initio Molecular Dynamics Study of Bioactive Phosphate Glasses
An Ab Initio Molecular Dynamics Study of Bioactive Phosphate Glasses
复制标题
生物活性磷酸盐玻璃的从头算分子动力学研究
DOI:
10.1002/adem.201080011
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发表时间:
2010
影响因子:
3.6
通讯作者:
Tang E
中科院分区:
文献类型:
--
作者:
Tang E
First principles molecular dynamics simulations of ternary phosphate‐based glasses P2O5CaONa2O (PBGs) have been carried out in order to provide an accurate description of the local structure and properties of these important materials for biomedical applications. The structures of PBGs with compositions (P2O5)0.45(CaO)x(Na2O)0.55 − x(x = 0.30, 0.35, and 0.40) were generated using a full ab initio molecular dynamics melt‐and‐quench procedure. The analysis of the structure of the glasses at 300 K shows the prevalence of the metaphosphate Q2and pyrophosphate Q1species, whereas the number of Q3units, which constitute the three‐dimensional phosphate network, significantly decreases with the increase in calcium content in the glass. Calculation of the pair and angular distribution functions suggests that the rigidity of the phosphate tetrahedral glass network increases with the concentration of calcium, an observation which is interpreted in terms of the tendency of Ca2+to be a stronger coordinator than sodium.
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DOI:
10.1088/0953-8984/21/7/075102
发表时间:
2009
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
作者:
Richard A. Martin;G. Mountjoy;R. J. Newport
通讯作者:
R. J. Newport
影响因子:
2.9
作者:
Ahmed, I;Lewis, MP;Knowles, JC
通讯作者:
Knowles, JC
DOI:
10.1021/jp065146k
发表时间:
2006-12
期刊:
The journal of physical chemistry. B
影响因子:
--
作者:
A. Tilocca;N. D. de Leeuw
通讯作者:
A. Tilocca;N. D. de Leeuw
影响因子:
3.7
作者:
L. Giacomazzi;C. Massobrio;Alfredo Pasquarello
通讯作者:
Alfredo Pasquarello
影响因子:
3.7
作者:
S. Ispas;M. Benoit;P. Jund;R. Jullien
通讯作者:
R. Jullien