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Updated: Dec 31, 2025
11:13
Analysis of Contact Interfaces for Single GaN Nanowire Devices
Published on: November 15, 2013
9.7K
Atomic structures and electronic properties of Ni or N modified Cu/diamond interface
Xue-Rong Shi1, Simin Huang1, Yue Huang1
1School of Material Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Songjiang District, Shanghai, People's Republic of China.
Summary
Interfacial additives like Nickel (Ni) and Nitrogen (N) significantly impact copper/diamond composite stability. Ni enhances specific interfaces, while N improves others, altering overall adhesion properties.
Area of Science:
- Materials Science
- Surface Science
- Computational Materials Science
Background:
- Interfacial stability in copper/diamond composites is crucial for mechanical and thermal properties.
- Understanding atomic and electronic structures at interfaces informs material design.
Purpose of the Study:
- Investigate the effect of Nickel (Ni) and Nitrogen (N) as interfacial additives on copper/diamond composites.
- Determine how these additives influence low-index interfacial adhesion and stability.
Main Methods:
- Density Functional Theory (DFT) calculations.
- Analysis of atomic structures, interfacial bond lengths, and electronic properties (density of states, bond populations, atomic charge).
Main Results:
- Unmodified interfaces show stability decreasing in the order Cu(001)/diamond(001) > Cu(111)/diamond(111) > Cu(011)/diamond(011).
- Ni enhances Cu(011)/diamond(011) stability and alters the stability sequence.
- N promotes Cu(111)/diamond(111) stability without changing the overall sequence.
Conclusions:
- Interfacial stability is linked to boundary type, bond characteristics, and electron interactions.
- Ni acts as an electron donor, while N acts as an electron acceptor at the interfaces.
- Additives offer a pathway to tune copper/diamond composite performance.
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