Carbon growth in diamond deposition on nickel studied in situ by soft x-ray emission spectroscopy

Abstract

Nucleation and bulk film growth kinetics of nanocrystalline diamond prepared by microwave plasmaenhanced chemical vapor deposition on silicon substrates Early stages of diamond growth by chemicalvapor deposition monitored both by electron spectroscopies and microstructural probesThe initial stages of diamond growth on nickel have been studied by in situ electron-excited soft x-ray emission spectroscopy. The study has been able to clarify that the codeposition of ordered graphite at the substrate/film interface is due to carbon precipitation during the cooling-down period after the deposition. The possibility to follow a deposition process from the initial stages to the end with soft x-ray emission spectroscopy is also demonstrated.

Soft X‐Ray Absorption and Emission Spectroscopy in the Studies of Nanomaterials

“…The spectra of diamond and graphitic carbon show the shape of a wide band with some shoulder structures where the energy positions of the peak maximum and band shapes are largely different. In some studies related to vapor deposition, the SXES spectral profile has been used as a means to identify certain chemical states [43][44][45][46].…”

Effect of Nano‐Ni Catalyst on the Growth and Characterization of Diamond Films by HFCVD

“…Recently, Ni nanoparticles were utilized for catalytic synthesis of carbon nanotube (CNT) by CVD because the graphitic layer covering Ni nanoparticles would transform into CNT under a controlled temperature [1,2]. On the other hand, the catalytic effect of Ni also was illustrated to inhibit CVD diamond nucleation and growth, though diamond may nucleate and grow on the amorphous carbon or graphitic interlayer initially formed on Ni in a low-pressure methanehydrogen environment [3][4][5][6][7]. Consequently, under a wellcontrolled growing condition, CNT and diamond can be simultaneously and selectively grown on Ni-coated and diamond powder-seeded Si substrates [8].…”