Structural characterisation of hypoxia-mimicking bioactive glasses.
Structural characterisation of hypoxia-mimicking bioactive glasses.
复制标题
模拟缺氧生物活性玻璃的结构表征。
DOI:
10.1039/c3tb00408b
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
Smith JM
中科院分区:
文献类型:
--
作者:
Smith JM
Nickel and cobalt are both known to stimulate the hypoxia-inducible factor-1 (HIF-1α), thus significantly improving blood vessel formation in tissue engineering applications. We have manufactured nickel and cobalt doped bioactive glasses to act as a controlled delivery mechanism of these ions. The resultant structural consequences have been investigated using the methods of isotopic and isomorphic substitution applied to neutron diffraction. The structural sites present will be intimately related to their release properties in physiological fluids such as plasma and saliva, and hence the bioactivity of the material. Detailed structural knowledge is therefore a prerequisite for optimising material design. Results show that nickel and cobalt adopt a mixed structural role within these bioactive glasses occupying both network-forming (tetrahedral) and network-modifying (5-fold) geometries. Two thirds of the Ni (or Co) occupies a five-fold geometry with the remaining third in a tetrahedral environment. A direct comparison of the primary structural correlations (e.g. Si–O, Ca–O, Na–O and O–Si–O) between the archetypal 45S5 Bioglass® and the Ni and Co glasses studied here reveal no significant differences. This indicates that the addition of Ni (or Co) will have no adverse effects on the existing structure, and thus on in vitro/in vivo dissolution rates and therefore bioactivity of these glasses.
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DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
G. Cuello
通讯作者:
G. Cuello
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
A. Pedone;T. Charpentier;G. Malavasi;M. Menziani
通讯作者:
M. Menziani
影响因子:
2.5
作者:
Ravel, B;Newville, M
通讯作者:
Newville, M
影响因子:
--
作者:
Richard A. Martin;Helen L. Twyman;Gregory J Rees;E. Barney;R. Moss;Jodie M. Smith;R. Hill;G. Cibin;T. Charpentier;Mark E. Smith;J. Hanna;R. J. Newport
通讯作者:
Richard A. Martin;Helen L. Twyman;Gregory J Rees;E. Barney;R. Moss;Jodie M. Smith;R. Hill;G. Cibin;T. Charpentier;Mark E. Smith;J. Hanna;R. J. Newport
影响因子:
8.6
作者:
Richard A. Martin;P. Salmon;H. Fischer;G. Cuello
通讯作者:
G. Cuello