New synthetic method of diamond using dc-plasma above water surface

Abstract

The new synthetic method of diamond was proposed, where the water worked as the electrode and 1-propanol vapor was introduced into the reaction chamber as the carbon source. The spectroscopic measurements exhibited the emission from H and OH in the plasma above the water surface and the appearance of CO, C₂ and CH with the addition of 1-propanol vapor. With the discharge current of 500 mA, the diamond particles exhibiting the distinct 1333 cm^-1 peak of Raman shift were found on n-Si(111) substrates.