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XRD, NMR, and EPR study of polycrystalline micro‐ and nano‐diamonds prepared by a shock wave compression method
Author(s) -
Shames Alexander I.,
Mogilyansky Dmitry,
Panich Alexander M.,
Sergeev Nikolay A.,
Olszewski Marcin,
Boudou JeanPaul,
Osipov Vladimir Yu.
Publication year - 2015
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201532154
Subject(s) - crystallite , electron paramagnetic resonance , materials science , nanometre , nano , compression (physics) , diamond , nanocrystal , facet (psychology) , stacking , shock (circulatory) , composite material , crystallography , analytical chemistry (journal) , nanotechnology , metallurgy , chemistry , nuclear magnetic resonance , chromatography , organic chemistry , medicine , psychology , social psychology , physics , personality , big five personality traits
We report on XRD, NMR, and EPR study of commercial micro‐ and nano‐diamonds of the SSX series fabricated by a shock wave compression method. XRD data analysis shows that SSX samples consist of nanometer cubic diamond domains intermixing with stacking faults and twins. We show that as‐received samples reveal a graphitic component, which may be removed by additional purification. Crushing the initial microdiamond powder into submicron and nanometer sizes does not result in noticeable variations of the XRD, NMR, and EPR parameters. This finding is explained by the fact that SSX diamonds are polycrystalline aggregates consisting of numerous nanocrystallites of ∼20–25 nm in size. Therefore, soft crushing of these aggregates diminishes their size, but leaves constituting nanocrystallites and their intrinsically facet surfaces mainly untreated. With that some modification of the outer nanocrystallite surface on crushing is observed.