Raman spectroscopic studies on nanodiamond composite (NDC) films, comprising nano-sized diamond grains and an amorphous carbon (a-C) matrix, deposited by coaxial arc plasma deposition are challenging because the scattering of the nano-sized diamond grains competes with the strong signal of the a-C matrix. To unravel the nanocomposite structure of NDC films, both far- and near-field Raman spectroscopy were employed. Based on the comparison of visible and ultraviolet far-field Raman data, component spectra based on either nanodiamond or a-C were estimated by a peak-decomposition procedure based on band fitting. Near-field optical resolution achieved via tip-enhanced Raman spectroscopy reveals sharper peaks of both the nanodiamond and the amorphous carbon than the far-field spectra. Consequently, the peak-decomposition procedure is not required, which evidently indicates the effective detection of nanodiamond grains embedded in a-C matrices and is a direct result of the high spatial resolution that limits the number of probed grains. The size of the nanocrystals could additionally be estimated from the profile and position of a diamond peak. This work demonstrates that tip-enhanced Raman spectroscopy is a powerful nondestructive method for nanodiamond composite films, which allows direct access to parameters hitherto only available via average data.
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Near- and far-field Raman spectroscopic studies of nanodiamond composite films deposited by coaxial arc plasma
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27 January 2020
Research Article|
January 30 2020
Near- and far-field Raman spectroscopic studies of nanodiamond composite films deposited by coaxial arc plasma

Ali M. Ali
;
Ali M. Ali
a)
1
Department of Applied Science for Electronics and Materials, Kyushu University
, Kasuga, Fukuoka 8168580, Japan
2
Department of Physics, Al-Azhar University
, Cairo 11884, Egypt
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Tanja Deckert-Gaudig
;
Tanja Deckert-Gaudig
3
Leibniz Institute of Photonic Technology (IPHT)
, Albert-Einsteinstr. 9, 07745 Jena, Germany
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Mohamed Egiza
;
Mohamed Egiza
1
Department of Applied Science for Electronics and Materials, Kyushu University
, Kasuga, Fukuoka 8168580, Japan
4
Department of Mechanical Engineering, Kafrelsheikh University
, Kafrelsheikh 33516, Egypt
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Volker Deckert
;
Volker Deckert
3
Leibniz Institute of Photonic Technology (IPHT)
, Albert-Einsteinstr. 9, 07745 Jena, Germany
5
Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller-University, Jena
Helmholtzweg 4, 07743 Jena, Germany
6
Institute of Quantum Science and Engineering, Texas A&M University
, College Station, Texas 77843-4242, USA
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Tsuyoshi Yoshitake
Tsuyoshi Yoshitake
a)
1
Department of Applied Science for Electronics and Materials, Kyushu University
, Kasuga, Fukuoka 8168580, Japan
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Appl. Phys. Lett. 116, 041601 (2020)
Article history
Received:
December 10 2019
Accepted:
January 06 2020
Connected Content
A companion article has been published:
Enhanced-tip Raman spectroscopy used to unravel the structure of nanodiamond-carbon films
Citation
Ali M. Ali, Tanja Deckert-Gaudig, Mohamed Egiza, Volker Deckert, Tsuyoshi Yoshitake; Near- and far-field Raman spectroscopic studies of nanodiamond composite films deposited by coaxial arc plasma. Appl. Phys. Lett. 27 January 2020; 116 (4): 041601. https://doi.org/10.1063/1.5142198
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