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
复制
发表时间:
2010
影响因子:
3.6
通讯作者:
Tang E
Tang E
中科院分区:
材料科学3区
文献类型:
--
作者:
Tang E

文献摘要

参考文献

被引文献

相似文献

对三元磷酸盐基玻璃P2O5·CaO·Na2O(PBG)进行了第一性原理分子动力学模拟,以准确描述这些重要材料的局部结构和性质,用于生物医学应用。使用完整的从头算分子动力学熔融和淬火程序生成了组成为(P2O5)0.45(CaO)x(Na2O)0.55 − x(x = 0.30,0.35和0.40)的PBG的结构。在300 K下对玻璃结构的分析显示偏磷酸盐Q2和焦磷酸盐Q1物种的普遍存在,而构成三维磷酸盐网络的Q3单元的数量随着玻璃中钙含量的增加而显著减少。对和角分布函数的计算表明,磷酸盐四面体玻璃网络的刚性随钙的浓度而增加,这是解释的趋势,Ca2+是一个更强的协调比钠的观察。
First principles molecular dynamics simulations of ternary phosphate‐based glasses P2O5CaONa2O (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.
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
DOI: 10.1177/0885328205049396
发表时间: 2005-07-01
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
DOI: 10.1103/physrevb.75.174207
发表时间: 2007
期刊: Physical Review B
影响因子: 3.7
作者:
L. Giacomazzi;C. Massobrio;Alfredo Pasquarello
通讯作者: Alfredo Pasquarello
来自经典和从头算分子动力学模拟的四硅酸钠玻璃 Na 2 Si 4 O 9 的结构和电子特性
DOI: 10.1103/physrevb.64.214206
发表时间: 2001
期刊: Physical Review B
影响因子: 3.7
作者:
S. Ispas;M. Benoit;P. Jund;R. Jullien
通讯作者: R. Jullien