Monitoring texture formation during diamond growth by specular and diffuse reflectance interferometry

Abstract

This paper is aimed at describing a sequential synthesis coupled to an extensive analysis in order to study the morphological evolution of a {100}{111} 100 textured diamond film. We compare several morphological parameters obtained by in situ optical methods and ex situ characterizations. The texture formation is found to be correlated with a significant increase in the growth rate of the film. In addition, morphology reconstruction of polycrystalline film is presented from which the R 100 covering ratio of {100} faces is extracted. As a result, a phenomenological model has been developed for real-time growth parameters extraction of the film based on in situ optical measurements.

Early stages of polycrystalline diamond deposition: laser reflectance at substrates with growing nanodiamonds

“…In the event that few or no extrema are observed, more sophisticated characterization techniques such as “specific zone marking”, 36 that enable the observation and measurement of localized diamond particles before and after diamond deposition, can be used.…”

“…The intercept with the taxis and the slope, both obtained by linear regression, are the incubation period and deposition rate, respectively. In the event that few or no extrema are observed, more sophisticated characterization techniques such as "specic zone marking", 36 that enable the observation and measurement of localized diamond particles before and aer diamond deposition, can be used.…”

“…This is done by shining a laser beam on a sample, collecting the specularly reected light with a photodetector, and analyzing the output signal that the photodetector produces. [35][36][37] Fig. 1 shows a schematic of a reectance setup installed on a CVD reactor.…”

Influences of grain size and microstructure on optical properties of microcrystalline diamond films*

“…When the film is completely continuous, the grain volume follows the improvement of van der Drift, which means that larger grains inhibit the growth of adjacent smaller grains. [18] With the average diameter exceeding 100 nm, the film becomes a microcrystal instead of a nanocrystal, [19] and the particle size distributions of the samples 3.5T40, 3.5T60, 3.5T80, and 3.5T100 are shown on the right of Fig. 1.…”

A lifetime of changing calls: North Atlantic right whales, Eubalaena glacialis, refine call production as they age

“…4 shows the schematic illustrations of the changes in crystal morphology as a function of the relative growth rate of constituent crystallographic planes. According to a geometric model, the variation in the crystal shape from octahedron through cubo-octahedron to cube was determined by considering the growth ratio of {111} to {100} faces in their normal directions, and the model can be used as a guide to adjust the growth rates, times, and crystal orientation [27,28]. Similarly, the octahedron, cubo-octahedron and cube structures were determined by the ratio R{111} /R{100} which was equal to 1 √3 ⁄ , 2 √3 ⁄ and √3, respectively [29].…”