Biomedical Engineering Reference
In-Depth Information
10 nm
10
m
m
100 nm
5 cm
(a)
(b)
(c)
(d)
(e)
(f)
7.7
A hierarchy of sizes from the human skeletal (far left, a) to the hydroxyapatite unit cell (far right, f). From left to
right, image (b) is a human femur, image (c) is a SEM micrograph and (d) and (e) are TEM micrographs, all of apatite
nanocrystals grown
in vitro
on the surface of bioactive ceramics.
