Interpretation of the Raman spectra of ultrananocrystalline diamond

Birrell, James; Gerbi, J. E.; Auciello, Orlando; Gibson, J. M.; Johnson, Jacqueline A.; Carlisle, John A.

doi:10.1016/j.diamond.2004.07.012

Cited by 252 publications

(160 citation statements)

References 30 publications

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“…The spectra from inside the wear scars were indistinguishable from the unworn UNCD flat and identical to previously reported spectra [26]. This spectroscopy showed the films on the spheres did not wear through.…”

supporting

confidence: 73%

Origin of Ultralow Friction and Wear in Ultrananocrystalline Diamond

et al. 2008

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supporting

confidence: 73%

Origin of Ultralow Friction and Wear in Ultrananocrystalline Diamond

et al. 2008

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“…The first difference is that there is no sharp peak around 1333 cm -1 , suggesting a shortage of large size grains and enriched grain boundaries of UNCD. [35] Actually, in this range there is a wide ÒhybridÓ peak combining a weak peak of first order of sp3 (1333 cm -1 ) and a more dominant so-called ÒD bandÓ peak (1310-1450 cm -1 ). [36] As the B/C gas ratio increases, the center of the peak shifts from 1355 cm -1 (B/C = 0 ppm) to ~1300 cm -1 (B/C = 6000 ppm), similar to ref.…”

Section: Resultsmentioning

confidence: 99%

Boron-doped ultrananocrystalline diamond synthesized with an H-rich/Ar-lean gas system

Zeng

Konicek

Moldovan

et al. 2015

Carbon

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This paper reports the recent development and applications of conductive borondoped ultrananocrystalline diamond (BD-UNCD). The authors have determined that BD-UNCD can be synthesized with an H-rich gaseous chemistry and a high CH 4 /H 2 ratio, which is opposite to previously reported methods with Ar-rich or H-rich gas compositions but utilizing very low CH 4 /H 2 ratio. The BD-UNCD has a resistivity as low as 0.01 ohm·cm, with low roughness (down to several nm) and a wide deposition temperature range (450-850¼C).The properties of this BD-UNCD were studied systematically using resistivity characterization, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and roughness measurements. Near Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopy confirms that up to 97% of the UNCD is deposited as sp3 carbon.These series of measurements also reveal additional unique properties for this material, such as an ÒMÓ shape Raman signature, line-granular nano-cluster texture and high C-H bond surface content. A hypothesis is provided to explain why this new deposition strategy, with H-rich/Ar-free gas chemistry and CH 4 /H 2 ratio, is able to produce high sp3-content and/or 2 heavily doped UNCD. In addition, a few emerging applications for BD-UNCD in the field of atomic force microscopy, electrochemistry and biosensing are reviewed here.

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“…2(a)) that is the characteristics of the diamond films with ultra-small grains. 26 There exists ν 1 -band (1140 cm −1 ) and ν 3 -band (1480 cm −1 ), which represents transpoly-acetylene phase located at the grain boundaries of the UNCD films. There also presents the D * -band (1350 cm −1 ) and G * -band (1580 cm −1 ), which represents the disordered carbon and graphitic phases.…”

Section: A the Overall Au-ion Irradiation Effectmentioning

confidence: 99%

The potential application of ultra-nanocrystalline diamond films for heavy ion irradiation detection

Chen

Wang

et al. 2013

AIP Advances

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The potential of utilizing the ultra-nanocrystalline (UNCD) films for detecting the Au-ion irradiation was investigated. When the fluence for Au-ion irradiation is lower than the critical value (fc = 5.0 × 1012 ions/cm2) the turn-on field for electron field emission (EFE) process of the UNCD films decreased systematically with the increase in fluence that is correlated with the increase in sp2-bonded phase (π*-band in EELS) due to the Au-ion irradiation. The EFE properties changed irregularly, when the fluence for Au-ion irradiation exceeds this critical value. The transmission electron microscopic microstructural examinations, in conjunction with EELS spectroscopic studies, reveal that the structural change preferentially occurred in the diamond-to-Si interface for the samples experienced over critical fluence of Au-ion irradiation, viz. the crystalline SiC phase was induced in the interfacial region and the thickness of the interface decreased. These observations implied that the UNCD films could be used as irradiation detectors when the fluence for Au-ion irradiation does not exceed such a critical value

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Interpretation of the Raman spectra of ultrananocrystalline diamond

Cited by 252 publications

References 30 publications

Origin of Ultralow Friction and Wear in Ultrananocrystalline Diamond

Origin of Ultralow Friction and Wear in Ultrananocrystalline Diamond

Boron-doped ultrananocrystalline diamond synthesized with an H-rich/Ar-lean gas system

The potential application of ultra-nanocrystalline diamond films for heavy ion irradiation detection

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