Geoscience Reference
In-Depth Information
or coupled sodium carbonate-substituted HAp (NaCO
3
HAp).
Figure 10.86
shows
as-prepared carbonated HAp powders with aggregates of nanosized HAp crystals. It is
well known that magnesium and carbonate are the two main ionic substitutions in bio-
logical apatites, and their preparations carry a great significance for biomedical appli-
cations. Such magnesium- and carbonate-substituted HAps have been prepared using
via heterogeneous chemical reactions under ambient temperature with the help of
mechanochemical
hydrothermal route
[401]
.
During mid-1990s, the influence of biomolecules in nanomaterials synthesis was
reported by several researchers
[402,403]
.Inthisspecialedition,Komarnenietal.
[387]
are reporting the synthesis of 1D nanorods/nanowires and assemblies of
inorganic materials with the assistance of biomolecules (such as sugars and their deri-
vatives; amino acids and their polymers, peptide, and protein) under conventional- or
microwave-hydrothermal conditions
[404]
. Similarly, a great variety of magnetic
nanoparticles, phosphors, and QDs have been prepared using the hydrothermal proces-
sing method.
Hydrothermal Treatment/Recycling/Alteration
This is probably one of the most important areas of research in the field of hydro-
thermal technology, wherein, the supercritical water properties are exploited for
Figure 10.86 Carbonated HAp powders with
aggregates of nanosized HAp crystals
[401]
.
