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Optical properties of the black diamond produced by ion implantation

Published online by Cambridge University Press:  30 June 2011

Jae-Won Park ,
Hyung-Jin Kim  and
Young-Chool Kim
Jae-Won Park*
Affiliation:
Korea Atomic Energy Research Institute, Yuseong-Gu, Daejeon 305-600, Korea
Hyung-Jin Kim
Affiliation:
Korea Atomic Energy Research Institute, Yuseong-Gu, Daejeon 305-600, Korea
Young-Chool Kim
Affiliation:
Hanmi Gemological Institute Laboratory, Bongik-dong, Jongno-gu, Seoul 110-390, Korea
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The optical properties of N-ion-implanted diamond are evaluated. The color of implanted layer became glossy black with metallic luster, which was further enhanced after postimplantation annealing at 600 °C for 2 h in vacuum or inert gas atmosphere. Raman spectroscopy revealed that the crystalline diamond became completely disordered after irradiation, but surprisingly the crystalline nature was restored to a mixture of well-defined diamond and diamond-like carbon after annealing. When it was annealed in air at the same temperature, however, the black color disappeared, indicating a removal of the disordered or graphitized layer by oxidation. X-ray photoelectron spectroscopy and Raman analyses indicate that the black color of as-implanted diamond is associated mainly with the disordered carbon and modified band structure. Fourier transform infrared (FTIR) analysis shows that the implanted nitrogen atoms are in N–N and symmetrical 4N-vacancy bonding states, which are commonly found in the natural diamonds with yellow and brown tint.

Keywords

DiamondIon implantationOptical properties
Type
Articles
Information
Journal of Materials Research , Volume 26 , Issue 13 , 14 July 2011 , pp. 1572 - 1576
Copyright
Copyright © Materials Research Society 2011

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