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http://dx.doi.org/10.6111/JKCGCT.2019.29.6.239

Effect of hydrogenation surface modification on dispersion and nucleation density of nanodiamond seed particle  

Choi, Byoung Su (Department of Nano Fusion Technology, Pusan National University)
Jeon, Hee Sung (Department of Nanomechatronics Engineering, Pusan National University)
Um, Ji Hun (Department of Nano Fusion Technology, Pusan National University)
Hwang, Sungu (Department of Nanomechatronics Engineering, Pusan National University)
Kim, Jin Kon (Department of Nanomechatronics Engineering, Pusan National University)
Cho, Hyun (Department of Nanomechatronics Engineering, Pusan National University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.29, no.6, 2019 , pp. 239-244 More about this Journal
Abstract
Two hydrogenation surface modifications, namely hydrogen atmosphere heat treatment and hydrogen plasma treatment, were found to lead to improved dispersion of nanodiamond (ND) seed particles and enhanced nucleation density for deposition of smooth ultrananocrystalline diamond (UNCD) film. After hydrogenation, the C-O and O-H surface functionalities on the surface of nanodiamond particles were converted to the C-H surface functionalities, and the Zeta potential was increased. As the degree of dispersion was improved, the size of nanodiamond aggregates decreased significantly and nucleation density increased dramatically. After hydrogen heat treatment at 600℃, average size of ND particles was greatly reduced from 3.5 ㎛ to 34.5 nm and a very high nucleation of ~3.9 × 1011 nuclei/㎠ was obtained for the seeded Si surface.
Keywords
Nanodiamond seed particle; Surface chemical modification; Hydrogenation; Dispersion; Nucleation density;
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