Molecular dynamics simulations and structural descriptors of radioisotope glass vectors for in situ radiotherapy.
Molecular dynamics simulations and structural descriptors of radioisotope glass vectors for in situ radiotherapy.
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用于原位放射治疗的放射性同位素玻璃载体的分子动力学模拟和结构描述符。
DOI:
10.1021/jp304200f
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Christie JK
中科院分区:
文献类型:
--
作者:
Christie JK
The low solubility (high durability) of yttrium aluminosilicate (YAS) glass is one of its most important properties for use in in situ radiotherapy. Simple parameters, such as silica or yttria content or network connectivity, are not sufficient to rationalize the dependence of the solubility on the glass composition observed experimentally. We performed classical molecular dynamics (MD) simulations of eight different YAS glasses of known solubility and analyzed the MD trajectories to identify specific structural features that are correlated and can be used to predict the solubility. We show that the (Si−)O–Si coordination number CNSiOSi, the yttrium–yttrium clustering ratioRYY, and the number of intratetrahedral O–Si–O bonds per yttrium atomNintracan be combined into a single structural descriptors=f(CNSiOSi,RYY,Nintra) with a high correlation with the solubility. The parameterscan thus be calculated from MD simulations and used to predict the solubility of YAS compositions, allowing one to adjust them to the range required by radiotherapy applications. For instance, its trend shows that high-silica- and low-yttria-content YAS glasses should be sufficiently durable for the radiotherapy application, although additional clinical considerations may set a lower limit to the yttria content.
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影响因子:
9.5
作者:
A. Tilocca;A. Cormack
通讯作者:
A. Cormack
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
M. Schmücker;H. Schneider
通讯作者:
H. Schneider
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
G. Lusvardi;G. Malavasi;L. Menabue;M. Menziani;A. Pedone;U. Segre
通讯作者:
U. Segre
影响因子:
--
作者:
A. Tilocca
通讯作者:
A. Tilocca
DOI:
10.1021/jp072061q
发表时间:
2007-07
期刊:
The journal of physical chemistry. B
影响因子:
--
作者:
P. Florian;N. Sadiki;D. Massiot;J. Coutures
通讯作者:
P. Florian;N. Sadiki;D. Massiot;J. Coutures