Defects and impurities in nanodiamonds: EPR, NMR and TEM study

被引：165

作者：

Shames, AI

Panich, AM

Kempinski, W

Alexenskii, AE

Baidakova, MV

Dideikin, AT

Osipov, VY

Siklitski, VI

Osawa, E

Ozawa, M

Vul', AY

机构：

[1] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel

[2] Polish Acad Sci, Inst Mol Phys, PL-60179 Poznan, Poland

[3] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[4] Toyohashi Univ Technol, Toyohashi, Aichi, Japan

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2002年 / 63卷 / 11期

关键词：

electron paramagnetic resonance (EPR); nuclear magnetic resonance (NMR);

D O I：

10.1016/S0022-3697(02)00185-3

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

EPR, C-13 NMR and TEM study of ultradisperse diamond (UDD) samples is reported. The compounds show a high concentration of paramagnetic centers (up to 10(20) spin/g), which are due to structural defects (dangling C-C bonds) on the diamond cluster surface. The anomalous reduction in the spin-lattice relaxation time of C-13 (from several hours in natural diamond to similar to 150 ms in UDD clusters) is attributed to the interaction between the unpaired electrons of the paramagnetic centers and nuclear spins. C-13 NMR line-width reflects the fact that the structure of the UDD surface is distorted in comparison to the 'bulk' diamond structure. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1993 / 2001

页数：9

共 44 条

[1] Structure and electronic properties of graphite nanoparticles [J].