Biomedical Engineering Reference
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the crystal lattice. The temperature needed for thermal activation
of their escape is higher than the temperature of graphitization of
nanodiamonds. The shape of HT-peak is governed by the kinetics of
annihilation of the diamond structure.
Ion implanted Ar
250eV
3000eV
50
40
30
20
N
2
(N
2+
)
"Graphitization" rate
(Butenko et al.)
10
0
800
800
1000
1000
1200
1200
1400
1400
1600
1600
TEMPERATURE,
o
C
Figure 6.13
High-temperature profiles of gas release (N
and implanted
Ar of different energies) and of “diamond-onions transition”
(calculated from the data of Refs. [84, 85]).
2
6.4
Conclusion
The presented data demonstrate the advantages of TDMS as
analytical method for characterization of nanodiamond surface
chemistry. Different types of UDD are characterized by differences in
concentration, composition, and structure of the surface functional
groups formed during synthesis and purification of UDD. These
