Location of paramagnetic defects in detonation nanodiamond from proton spin-lattice relaxation data

A M Panich; N A Sergeev; S D Goren

doi:10.1016/j.ssnmr.2019.101624

Location of paramagnetic defects in detonation nanodiamond from proton spin-lattice relaxation data

Solid State Nucl Magn Reson. 2020 Feb:105:101624. doi: 10.1016/j.ssnmr.2019.101624. Epub 2019 Oct 31.

Authors

A M Panich¹, N A Sergeev², S D Goren³

Affiliations

¹ Department of Physics, Ben-Gurion University of the Negev, P. O. Box 653, Be'er Sheva, 8410501, Israel. Electronic address: pan@bgu.ac.il.
² Department of Mathematics and Physics, Institute of Physics, University of Szczecin, 70-451, Szczecin, Poland.
³ Department of Physics, Ben-Gurion University of the Negev, P. O. Box 653, Be'er Sheva, 8410501, Israel.

PMID: 31731104
DOI: 10.1016/j.ssnmr.2019.101624

Abstract

We developed an approach for determining location of intrinsic paramagnetic defects in nanodiamonds from the data of proton spin-lattice relaxation of the surface hydrogen atoms. The approach was applied to the detonation nanodiamond (DND) of the diameter of 5 nm. We found that dangling bonds with unpaired electron spins are located within the near-surface belt at the distance of 0.3-0.9 nm from the DND surface. The NMR data are compared with the results of EPR measurements.

Keywords: Hydrogen; Location; NMR relaxation; Nanodiamond; Paramagnetic defects.