Biomedical Engineering Reference
In-Depth Information
Fig. 7.8
Phase and morphology evolution of calcium phosphate minerals. (
a
-
c
) TEM images and
SAED patterns of the precipitates. (
a
) Initially formed ACP spheres. Bar: 1
m and 100 nm
(subimage). (
b
) Intermediate state of ACP. Bar: 1
m and 100 nm (subimage). (
c
) Final spherulite
HAP. Bar: 1
m and 200 nm (subimage). (
d
-
i
) SEM images of the evolution of ACP. (
d
)3min.
(
e
-
g
) 67-73 min. (
h
)90min.(
i
)7h.Bar:(
d
-
f
) 100 nm; (
g
) 200 nm; (
h
-
i
)1
m. The selected area
diffraction (
SAED
) study together with XRD examination indicates that the mineral phase is HAP,
and each platelet in a spherulite arm is a single crystallite (see (
c
)). Reproduced with permission
from Ref. [
63
] © The Royal Society of Chemistry 2010
