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The approach to diamond growth on levitating seed particles
- Source :
-
Applied Surface Science . Oct2007, Vol. 254 Issue 1, p177-180. 4p. - Publication Year :
- 2007
-
Abstract
- Abstract: We demonstrate the approach of diamond growth on levitating seed particles in a rf plasma. We introduce a hot filament chemical vapor deposition (CVD) technique into the rf plasma chamber in order to obtain improved crystal growth. Firstly, we confirmed diamond nucleation on seed particles placed on a Si substrate using the hot filament CVD. The deposition conditions, namely the total pressure and the rf power, were chosen so that they correspond to particles levitation conditions. We observe that a hydrogen pre-treatment on the seed particles improves the nucleation. Secondly, we confirm the levitation of particles at high temperatures. Fine particles levitated in a plasma are particularly sensitive to thermophoretic effects due to inhomogeneities in the gas heating. Therefore, proper heating procedures are required for successful particles levitation. [Copyright &y& Elsevier]
- Subjects :
- *LEVITATION
*NUCLEATION
*CRYSTAL growth
*TWINNING (Crystallography)
Subjects
Details
- Language :
- English
- ISSN :
- 01694332
- Volume :
- 254
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Applied Surface Science
- Publication Type :
- Academic Journal
- Accession number :
- 27049587
- Full Text :
- https://doi.org/10.1016/j.apsusc.2007.07.017