13C spin-lattice relaxation in nanodiamonds in static and magic angle spinning regimes

N. A. Sergeev; A. M. Panich; M. Olszewski; O. Shenderova; S. D. Goren

doi:10.1016/j.ssnmr.2014.10.008

¹³C spin-lattice relaxation in nanodiamonds in static and magic angle spinning regimes

N. A. Sergeev, A. M. Panich, M. Olszewski, O. Shenderova, S. D. Goren

Department of Physics

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

We report on ¹³C nuclear spin-lattice relaxation time (T₁) dependence on the magic-angle-spinning (MAS) rate in powder nanodiamond samples. We confirm that the relaxation is caused by interaction of nuclear spins with fluctuating electron spins of localized paramagnetic defects. It was found that T₁ is practically not affected by MAS for small particles, while for larger particles with lower defect density T₁ is different in static and MAS regimes and reveals elongation with increasing MAS rate. This effect is attributed to suppression of nuclear spin diffusion by MAS. We propose an approach that describes T₁ dependence on the MAS rate and allows quantitative analysis of this effect.

Original language	English
Pages (from-to)	51-55
Number of pages	5
Journal	Solid State Nuclear Magnetic Resonance
Volume	66
DOIs	https://doi.org/10.1016/j.ssnmr.2014.10.008
State	Published - 1 Apr 2015

Keywords

MAS
NMR
Nanodiamond
Spin diffusion

ASJC Scopus subject areas

Radiation
General Chemistry
Nuclear and High Energy Physics
Instrumentation

Access to Document

10.1016/j.ssnmr.2014.10.008

Cite this

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title = "13C spin-lattice relaxation in nanodiamonds in static and magic angle spinning regimes",

abstract = "We report on 13C nuclear spin-lattice relaxation time (T1) dependence on the magic-angle-spinning (MAS) rate in powder nanodiamond samples. We confirm that the relaxation is caused by interaction of nuclear spins with fluctuating electron spins of localized paramagnetic defects. It was found that T1 is practically not affected by MAS for small particles, while for larger particles with lower defect density T1 is different in static and MAS regimes and reveals elongation with increasing MAS rate. This effect is attributed to suppression of nuclear spin diffusion by MAS. We propose an approach that describes T1 dependence on the MAS rate and allows quantitative analysis of this effect.",

keywords = "MAS, NMR, Nanodiamond, Spin diffusion",

author = "Sergeev, {N. A.} and Panich, {A. M.} and M. Olszewski and O. Shenderova and Goren, {S. D.}",

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T1 - 13C spin-lattice relaxation in nanodiamonds in static and magic angle spinning regimes

AU - Sergeev, N. A.

AU - Panich, A. M.

AU - Olszewski, M.

AU - Shenderova, O.

AU - Goren, S. D.

PY - 2015/4/1

Y1 - 2015/4/1

N2 - We report on 13C nuclear spin-lattice relaxation time (T1) dependence on the magic-angle-spinning (MAS) rate in powder nanodiamond samples. We confirm that the relaxation is caused by interaction of nuclear spins with fluctuating electron spins of localized paramagnetic defects. It was found that T1 is practically not affected by MAS for small particles, while for larger particles with lower defect density T1 is different in static and MAS regimes and reveals elongation with increasing MAS rate. This effect is attributed to suppression of nuclear spin diffusion by MAS. We propose an approach that describes T1 dependence on the MAS rate and allows quantitative analysis of this effect.

AB - We report on 13C nuclear spin-lattice relaxation time (T1) dependence on the magic-angle-spinning (MAS) rate in powder nanodiamond samples. We confirm that the relaxation is caused by interaction of nuclear spins with fluctuating electron spins of localized paramagnetic defects. It was found that T1 is practically not affected by MAS for small particles, while for larger particles with lower defect density T1 is different in static and MAS regimes and reveals elongation with increasing MAS rate. This effect is attributed to suppression of nuclear spin diffusion by MAS. We propose an approach that describes T1 dependence on the MAS rate and allows quantitative analysis of this effect.

KW - MAS

KW - NMR

KW - Nanodiamond

KW - Spin diffusion

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DO - 10.1016/j.ssnmr.2014.10.008

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SP - 51

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JO - Solid State Nuclear Magnetic Resonance

JF - Solid State Nuclear Magnetic Resonance

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