Effect of Boron Doping Concentration on the Wettability and Surface Free Energy of Polycrystalline Boron-Doped Diamond Film

The wettability and surface free energy of diamonds are crucial for their applications. In this study, polycrystalline boron-doped diamond (PBDD) films with different boron doping concentrations were prepared, and the effect of the boron doping concentration on the wettability and surface free energ...

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Bibliographic Details
Published in:Coatings (Basel) 2023-02, Vol.13 (2), p.305
Main Authors: Wang, Peng, Yu, Qiyuan, Yuan, Xiaoxi, Cui, Zheng, Liu, Yaofeng, Gao, Nan, Jin, Huichao, Cheng, Shaoheng, Liu, Junsong, Li, Hongdong
Format: Article
Language:English
Subjects:
Boron
Contact angle
Density functionals
Diamond films
Diamonds
Doping
Estimation
Free energy
Gases
Molecular dynamics
Morphology
Polycrystals
Scanning electron microscopy
Silicon wafers
Surface chemistry
Surface tension
Wettability
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Summary:The wettability and surface free energy of diamonds are crucial for their applications. In this study, polycrystalline boron-doped diamond (PBDD) films with different boron doping concentrations were prepared, and the effect of the boron doping concentration on the wettability and surface free energy (SFE) of the film was investigated. The SFEs of the PBDD films were investigated by employing the surface tension component approach and the equation-of-state approach. The investigation suggested that the alternative formulation of Berthelot’s rule, the Lifshitz-van der Waals/acid-base (van Oss) approach, and the Owens-Wendt-Kaelble approach were suitable for estimating the SFEs of PBDD films, whereas the Fowkes approach, Berthelot’s (geometric mean) combining rule, and Antonow’s rule could not provide reliable results. Results showed that the SFEs of PBDD films increased with increasing boron doping concentration, and the SFEs were 43.26–49.66 mJ/m2 (Owens-Wendt-Kaelble approach), 42.89–52.26 mJ/m2 (Lifshitz-van der Waals/acid-base), and 44.38–48.73 mJ/m2 (alternative formulation of Berthelot’s rule). This study also provides a reference for the application of empirical and physics-based semi-empirical approaches to SFE estimation.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings13020305