NUCLEAR-MAGNETIC-RESONANCE AND INFRARED-ABSORPTION STUDIES OF HYDROGEN INCORPORATION IN POLYCRYSTALLINE DIAMOND

被引：55

作者：

MCNAMARA, KM ^{[1
]}

LEVY, DH ^{[1
]}

GLEASON, KK ^{[1
]}

ROBINSON, CJ ^{[1
]}

机构：

[1] RAYTHEON CO,LEXINGTON,MA 02173

来源：

APPLIED PHYSICS LETTERS | 1992年 / 60卷 / 05期

关键词：

D O I：

10.1063/1.106616

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Hydrogen incorporated into polycrystalline diamond was found to correlate with the optimal absorption in the 8 to 10-mu-m wavelength IR region, where transparency is desired. In this first detailed study of diamond films by H-1 NMR, average concentrations were found to be < 0.25 at. % H. However, segregation produces regions of extremely high local hydrogen density as evidenced by a broad (50-70 kHz) Gaussian NMR component. The majority of this clustered hydrogen is rigidly held, while a fraction undergoes motional narrowing at room temperature, most likely due to methyl group rotation. Sites at grain boundaries are capable of accounting for a significant fraction of this hydrogen, as are defects and voids within the crystal or a heavily hydrogenated phase stable at the deposition temperature.

引用

页码：580 / 582

页数：3

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