Publication

The Raman spectroscopy of diamond films deposited on metal and insulator substrates with varying thermal expansion coefficient

Hubert van den Bergh
1992
Journal Articles

Abstract

Polycryst. diamond films were deposited by hot filament assisted chem. vapor deposition on five metal and insulator substrates. The films obtained were studied by Raman spectroscopy. The position of the Raman line shifts to higher wavenumbers when the thermal expansion coeff. of the substrate material increases. This effect is interpreted as a result of the internal stress in the diamond films induced by the cooling from the deposition temp. to room temp. The width of the Raman peak ranges from 10.9 to 16.6 cm-1, with a min. when the thermal expansion coeff. of the substrate is close to that of diamond.

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https://infoscience.epfl.ch/entities/publication/14f162bf-9f70-4231-89a4-766a84aec8fd

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Hubert van den Bergh
1992
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/14f162bf-9f70-4231-89a4-766a84aec8fd

About this result

Related concepts (28)

Chemical vapor deposition

Chemical vapor deposition (CVD) is a vacuum deposition method used to produce high-quality, and high-performance, solid materials. The process is often used in the semiconductor industry to produce thin films. In typical CVD, the wafer (substrate) is exposed to one or more volatile precursors, which react and/or decompose on the substrate surface to produce the desired deposit. Frequently, volatile by-products are also produced, which are removed by gas flow through the reaction chamber.

Synthetic diamond

Lab-grown diamond (LGD; also called laboratory-grown, laboratory-created, man-made, artisan-created, artificial, synthetic, or cultured diamond) is diamond that is produced in a controlled technological process (in contrast to naturally formed diamond, which is created through geological processes and obtained by mining). Unlike diamond simulants (imitations of diamond made of superficially similar non-diamond materials), synthetic diamonds are composed of the same material as naturally formed diamonds – pure carbon crystallized in an isotropic 3D form – and share identical chemical and physical properties.

Raman spectroscopy

Raman spectroscopy (ˈrɑːmən) (named after Indian physicist C. V. Raman) is a spectroscopic technique typically used to determine vibrational modes of molecules, although rotational and other low-frequency modes of systems may also be observed. Raman spectroscopy is commonly used in chemistry to provide a structural fingerprint by which molecules can be identified. Raman spectroscopy relies upon inelastic scattering of photons, known as Raman scattering.

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The Raman spectroscopy of diamond films deposited on metal and insulator substrates with varying thermal expansion coefficient

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