Biomedical Engineering Reference
In-Depth Information
6.3.8 TDMS of Gases Released from UDD under
High Temperature Pyrolysis: Implication to the
Meteoriic Nanodiamonds
The first publications on the nanodiamond particles found in
detonation soot [1, 2] and in some primitive meteorites [22]
appeared almost concurrently more than 20 years ago. Meteoritic
nanodiamonds (MNDs) contain isotopically distinct noble gas
components and are considered as “the messengers from the stars”
carrying the traces of nuclear processes in circumstellar media [78].
Some similarities between the properties of UDD and MND (particle
sizes, surface chemistry) were pointed out in one of the first paper on
UDD [2]. Starting from this similarity we have used UDD as synthetic
analogs of presolar diamonds in laboratory simulation experiments
of cosmochemical relevance [60-62, 79-83,]. In this section, some
results of measurements of noble gases in UDD are presented in
comparison with the data on MND.
Figure 6.9
Gas release curves during stepped pyrolysis of meteoritic
(Orgueil) nanodiamonds [78] and UDD sample implanted with
noble gas mixture (700 eV).
