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Title: Diamond synthesis at atmospheric pressure by microwave capillary plasma chemical vapor deposition

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4934751· OSTI ID:1335449

Polycrystalline diamond has been successfully synthesized on silicon substrates at atmospheric pressure using a microwave capillary plasma chemical vapor deposition technique. The CH4/Ar plasma was generated inside of quartz capillary tubes using 2.45 GHz microwave excitation without adding H2 into the deposition gas chemistry. Electronically excited species of CN, C2, Ar, N2, CH, Hβ and Hα were observed in emission spectra. Raman measurements of deposited material indicate the formation of well-crystallized diamond, as evidenced by the sharp T2g phonon at 1333 cm-1 peak relative to the Raman features of graphitic carbon. Furthermore, field emission scanning electron microscopy (SEM) images reveal that, depending on the on growth conditions, the carbon microstructures of grown films exhibit “coral” and “cauliflower-like” morphologies or well-facetted diamond crystals with grain sizes ranging from 100 nm to 10 μm.

Research Organization:
Carnegie Inst. of Washington, Washington, DC (United States); Energy Frontier Research Centers (EFRC) (United States). Energy Frontier Research in Extreme Environments (EFree)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0002006; SC0001057; W31P4Q1310005; NA-002006
OSTI ID:
1335449
Alternate ID(s):
OSTI ID: 1224932
Journal Information:
Applied Physics Letters, Vol. 107, Issue 18; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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Cited By (3)

Fast growth of nanodiamond in a microwave oven under atmospheric conditions journal August 2019
Morphology and mechanical behavior of diamond films fabricated by IH-MPCVD journal January 2018
Novel Diamond Films Synthesis Strategy: Methanol and Argon Atmosphere by Microwave Plasma CVD Method Without Hydrogen journal September 2016

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