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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
 [1];  [2];  [2]
  1. Carnegie Inst. of Washington, Washington, D.C. (United States); Carnegie Institution of Washington
  2. Carnegie Inst. of Washington, Washington, D.C. (United States)
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, D.C. (United States); Energy Frontier Research Centers (EFRC) (United States). Energy Frontier Research in Extreme Environments (EFree)
Sponsoring Organization:
USDOE; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0002006; SC0001057
OSTI ID:
1335449
Alternate ID(s):
OSTI ID: 1224932
OSTI ID: 22485988
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 18 Vol. 107; ISSN 0003-6951; ISSN APPLAB
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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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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