X-ray induced synthesis of 8H diamond

Zhongwu Wang; Yusheng Zhao; Chang Sheng Zha; Qing Xue; Robert T. Downs; Ren Guan Duan; Razvan Caracas; Xiaozhou Liao

doi:10.1002/adma.200800052

X-ray induced synthesis of 8H diamond

Zhongwu Wang, Yusheng Zhao, Chang Sheng Zha, Qing Xue, Robert T. Downs, Ren Guan Duan, Razvan Caracas, Xiaozhou Liao

Geosciences

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23 Scopus citations

Abstract

The samples of predominantly 8H diamond polytype can be synthesized at ambient pressure by intense 20 kW synchrotron X-ray radiation at CHESS (Cornell High Energy Synchrotron Source) wiggler beam line was investigated. Low-magnification Transmission Electron Microscopy (TEM) images revealed that the X-ray-induced carbon displays a particular lamellar morphology, and selected area electron diffraction (SAED) patterns display 12 symmetrical spots with d-spacings that range from 1.99 to 2.14 Å. Synchrotron X-ray diffraction measurements together with simulations of the patterns were used to confirm the hexagonal structure. It was observed that an energetic high-temperature environment favors the nucleation of 3C and 2H diamond with a critical particle size of 2 nm, in which dislocations and stacking faults are not stable.

Original language	English (US)
Pages (from-to)	3303-3307
Number of pages	5
Journal	Advanced Materials
Volume	20
Issue number	17
DOIs	https://doi.org/10.1002/adma.200800052
State	Published - Sep 3 2008

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1002/adma.200800052

Cite this

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title = "X-ray induced synthesis of 8H diamond",

abstract = "The samples of predominantly 8H diamond polytype can be synthesized at ambient pressure by intense 20 kW synchrotron X-ray radiation at CHESS (Cornell High Energy Synchrotron Source) wiggler beam line was investigated. Low-magnification Transmission Electron Microscopy (TEM) images revealed that the X-ray-induced carbon displays a particular lamellar morphology, and selected area electron diffraction (SAED) patterns display 12 symmetrical spots with d-spacings that range from 1.99 to 2.14 {\AA}. Synchrotron X-ray diffraction measurements together with simulations of the patterns were used to confirm the hexagonal structure. It was observed that an energetic high-temperature environment favors the nucleation of 3C and 2H diamond with a critical particle size of 2 nm, in which dislocations and stacking faults are not stable.",

author = "Zhongwu Wang and Yusheng Zhao and Zha, {Chang Sheng} and Qing Xue and Downs, {Robert T.} and Duan, {Ren Guan} and Razvan Caracas and Xiaozhou Liao",

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doi = "10.1002/adma.200800052",

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T1 - X-ray induced synthesis of 8H diamond

AU - Wang, Zhongwu

AU - Zhao, Yusheng

AU - Zha, Chang Sheng

AU - Xue, Qing

AU - Downs, Robert T.

AU - Duan, Ren Guan

AU - Caracas, Razvan

AU - Liao, Xiaozhou

PY - 2008/9/3

Y1 - 2008/9/3

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AB - The samples of predominantly 8H diamond polytype can be synthesized at ambient pressure by intense 20 kW synchrotron X-ray radiation at CHESS (Cornell High Energy Synchrotron Source) wiggler beam line was investigated. Low-magnification Transmission Electron Microscopy (TEM) images revealed that the X-ray-induced carbon displays a particular lamellar morphology, and selected area electron diffraction (SAED) patterns display 12 symmetrical spots with d-spacings that range from 1.99 to 2.14 Å. Synchrotron X-ray diffraction measurements together with simulations of the patterns were used to confirm the hexagonal structure. It was observed that an energetic high-temperature environment favors the nucleation of 3C and 2H diamond with a critical particle size of 2 nm, in which dislocations and stacking faults are not stable.

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X-ray induced synthesis of 8H diamond

Abstract

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