The In Situ Observation of Epitaxial Diamond Thin Film Nucleation and Growth Using Emission Electron Microscopy
Abstract
In situ observation of CVD diamond dissolution and etching using photoemission electron microscopy (PEEM) suggests that nucleation of diamond occurs directly on molybdenum (Mo), with a Mo-carbide bulk diffusion barrier that facilitates surface carbon transport for growth. Low energy electron microscopy of doped homoepitaxial C(100) is hindered by surface roughness, which is visible in PEEM. Charging observed with type IIa diamond is no longer present, but the high secondary electron yield is still problematic for direct imaging. TEM studies of CVD diamond grown directly on Mo TEM grids show a 10nm thick amorphous C layer after growth, which is easily removable with an isopropanol rinse. LEED studies of Si(310) substrates for diamond growth show a (2Xl) Si(310) reconstructed surface, with some facetting with fourfold symmetry. Nucleation is sparse and random on the Si(310) surfaces examined to date. CVD diamond, Nucleation, Emission microscopy, In situ electron microscopy, STM, Si(310).
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1993
- Accession Number
- ADA273698
Entities
People
- Martin E Kordesch
Organizations
- Ohio University