Paramagnetic centers in detonation nanodiamonds studied by CW and pulse EPR
2010 (English)In: Chemical Physics Letters, ISSN 0009-2614, E-ISSN 1873-4448, Vol. 493, no 04-Jun, 319-322 p.Article in journal (Refereed) Published
Dispersed detonation nanodiamonds have been studied by continuous-wave (CW) and pulse EPR techniques. The spectrum of bulk radicals (g = 2.0025 +/- 0.0002, a Lorentz line shape with Delta H-pp = 0.95 +/- 0.05 mT) dominated in CW EPR and prevented to record spectra from other paramagnetic species. The pulse EPR-spectrum was the superposition of the distorted P1-center spectrum with parameters (g = 2.0025, A(xx) = 2.57 mT, A(yy) = 3.08 mT, A(zz) = 4.07 mT), the H1-center spectrum (g = 2.0028) and the single line (g = 2.0025, DHpp = 0.40 +/- 0.05 mT) from other centers which may be assigned to surface radicals. The concentration of P1-centers has been estimated by CW EPR as 2 +/- 1 ppm N.
Place, publisher, year, edition, pages
Elsevier Science B.V., Amsterdam. , 2010. Vol. 493, no 04-Jun, 319-322 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-58379DOI: 10.1016/j.cplett.2010.05.050ISI: 000278650000026OAI: oai:DiVA.org:liu-58379DiVA: diva2:343306
A.V. Fionov, Anders Lund, Weimin Chen, N.N. Rozhkova, Irina Buyanova, G.I. Emelyanova, L.E. Gorlenko, E.V. Golubina, E.S. Lokteva, E. Osawa and V.V. Lunin, Paramagnetic centers in detonation nanodiamonds studied by CW and pulse EPR, 2010, Chemical Physics Letters, (493), 04-Jun, 319-322.
Copyright: Elsevier Science B.V., Amsterdam.