Abstract
The results of experiments on the synthesis of micro- and nano-diamonds by an oxy-acetylene torch on the surface of the pre-deposited copper thin films are presented in this article. The influence of thickness of a buffer copper film and the ratio of the concentrations of oxygen and acetylene on the structure of the deposited samples has been studied in the course of the conducted experiments. The studies by Raman scattering and scanning electron microscopy showed that the synthesis of micro- and nano-diamonds occurs under certain experimental conditions. From the results of the analysis of the obtained samples by the methods of Raman scattering and scanning electron microscopy, it was determined that the deposition time of the copper films and consequently its thickness mainly influence on the structure formation of diamond crystals. On copper films grown for 30 min, the Raman scattering method showed a shift of the diamond peak from the standard (1332 cm‒1) to the low-frequency band (1331.3 cm‒1), which may occur after the presence of stress in the crystals. The results of the investigation showed that with increasing of synthesis time take place smoothing of the facets of crystallites (scanning electron microscopy) and decrease in intensity of the diamond peaks (Raman scattering method).
Highlights
In recent years, nanodiamonds are used in many scientific and technical areas due to unique set of physical, chemical and tribological properties
This paper presents the results of studies of micro- and nanodiamonds obtained in the flame of oxy-acetylene torch on the surface of the copper film previously deposited on the silicon wafers by Raman scattering (RS) and scanning electron microscopy (SEM)
SEM studies showed that the thickness of the copper films deposited on silicon wafer for 30 min is 437.2 nm, whereas thick layer with thickness of 524.6 nm is observed for deposition time of 60 min, regardless of Si orientation
Summary
Nanodiamonds are used in many scientific and technical areas due to unique set of physical, chemical and tribological properties. Nanodiamond coatings are biocompatible material with human tissue and can provide improved adhesion and low wear of prosthesis This wide range of possibilities of technological applications contributed to active search for new, more efficient and cost-effective methods for the synthesis and manufacture of diamond and diamond-like materials [1]. The simplest but efficient methods for producing carbon materials refers method oxy-acetylene torch, wherein the deposition occurs at atmospheric pressure, i.e. it does not require complex vacuum and electronic equipment. This technique has several advantages compared to other methods such as high rate of synthesis, simplicity and low. This paper presents the results of studies of micro- and nanodiamonds obtained in the flame of oxy-acetylene torch on the surface of the copper film previously deposited on the silicon wafers by Raman scattering (RS) and scanning electron microscopy (SEM)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
