Use of Raman scattering to investigate disorder and crystallite formation in as-deposited and annealed carbon films

Dillon, R. O.; Woollam, John A.; Katkanant, V.

doi:10.1103/physrevb.29.3482

Cited by 1,081 publications

(381 citation statements)

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“…These indicate that the increasing annealing temperature is associated with an the ordering of sp 2 clusters in the film, and high temperature in 700 o C finally led to the change to a graphite-like structure. 12,14,15 Also, the adhesion behavior of carbon films decreased with increasing annealing temperature, indicating an increase in ordered sp 2 clusters in the carbon networks and a decrease in cross-linked bonds between the film and substrate. 7,14 However, intrinsic stress gradually decreased with increasing annealing temperature.…”

Section: Resultsmentioning

confidence: 99%

Temperature Dependence on Structural, Tribological, and Electrical Properties of Sputtered Conductive Carbon Thin Films

Park¹,

Hong²,

Cho³

et al. 2011

Bulletin of the Korean Chemical Society

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Conductive carbon films were prepared at room temperature by unbalanced magnetron sputtering (UBMS) on silicon substrates using argon (Ar) gas, and the effects of post-annealing temperature on the structural, tribological, and electrical properties of carbon films were investigated. Films were annealed at temperatures ranging from 400 °C to 700 °C in increments of 100 °C using a rapid thermal annealing method by vacuum furnace in vacuum ambient. The increase of annealing temperature contributed to the increase of the ordering and formation of aromatic rings in the carbon film. Consequently, with increasing annealing temperature the tribological properties of sputtered carbon films are deteriorated while the resistivity of carbon films significantly decreased from 4.5 × 10 −3 to 1.0 × 10 −6 Ω-cm and carrier concentration as well as mobility increased, respectively. This behavior can be explained by the increase of sp 2 bonding fraction and ordering sp 2 clusters in the carbon networks caused by increasing annealing temperature.

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Section: Resultsmentioning

confidence: 99%

Temperature Dependence on Structural, Tribological, and Electrical Properties of Sputtered Conductive Carbon Thin Films

Park¹,

Hong²,

Cho³

et al. 2011

Bulletin of the Korean Chemical Society

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“…In literature, Gaussians are common 32,33 , but also asymmetrical line shapes as the Breit-WignerFano (BWF) are used 18,34 . The use of an asymmetric line shape is justified by the asymmetry of the vibrational density of states (DOS) towards lower wave numbers for graphite and amorphous carbon in the region of the D and G lines 35 . Asymmetrical line shapes allow fitting the whole spectrum with only two peaks, e.g.…”

Section: Peak Fittingmentioning

confidence: 99%

Influence of doping (Ti, V, Zr, W) and annealing on the sp2 carbon structure of amorphous carbon films

Adelhelm

Balden

Rinke

et al. 2009

Journal of Applied Physics

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The influence of the transition metal (Ti, V, Zr, W) doping on the carbon matrix nanostructuring during the thin film growth and subsequent annealing is investigated. Pure and metal-doped amorphous carbon films (a-C, a-C:Me) were deposited at room temperature by non-reactive magnetron sputtering. The carbon structure of as-deposited and post-annealed (up to 1300 K) samples was analyzed by X-ray diffraction (XRD) and Raman spectroscopy.The existence of graphene-like regions in a-C is concluded from a (10) diffraction peak. A comparison of the XRD and Raman results suggests that XRD probes only the small amount of 2-3 nm large graphene-like regions, whereas the majority of the sp 2 phase is present in smaller distorted aromatic clusters which are probed only by Raman spectroscopy. Annealing leads to an increase of the graphene size and the aromatic cluster size. During the carbon film growth the addition of metals enhances ordering of sp 2 carbon in sixfold aromatic clusters compared to a-C, Ti and Zr showing the strongest effect, W the lowest. This order qualitatively corresponds with the catalytic activity of the respective carbides found during graphitization of carbide-doped graphites published in the literature. With annealing, carbide crystallite formation and growth occurs in a-C:Me films, which destroys the initial carbon structure, reduces the size of the initially formed aromatic clusters and the differences in carbon structure introduced by different dopants. For high annealing temperatures the carbon structure of a-C:Me films is similar to that of a-C, and is determined only by the annealing temperature.2

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“…The G peak at around 1580-1600 cm -1 has been assigned to the scattering by sp 2 bonded carbon associated with graphite. The D peak at around 1350 cm -1 is associated with the disorder due to the formation of sp 3 bonded between graphite adjacent planes [34,35]. Intensity Fig.…”

Section: Materials Resultsmentioning

confidence: 99%

Haemocompatibility Of Non-Functionalized And Plasmachemical Functionalized Detonation Nanodiamond Particles

Mitura¹,

Jędrzejewska‐Szczerska²,

Ceynowa³

et al. 2015

Archives of Metallurgy and Materials

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The purpose of this paper is to present the innovative design of microwave plasma system for modification of detonation nanodiamond particles (DNP) using a special rotating drum placed inside the reactor. Nanodiamond particles manufactured by detonation method reveal the biological activity depending on surface functionalization. Plasmachemical modification of detonation nanodiamond particles gives the possibility of controlling surface of nanodiamonds particles in biological tests. In this paper we would like to compare detonation nanodiamond (the grain sizes from 2 to 5 nm) with modified detonation nanodiamond in rotary reactor chamber, by microwave plasma activated chemical vapour deposition (MW PACVD) method in materials research (Raman and FT-IR spectroscopy) and in vitro examinations with full of human blood. The results indicate haemocompatibility of non-modified detonation nanodiamond and modified nanodiamond by MW PACVD method in rotary reactor chamber (modified ND-3) and the presence of haemolysis in commercial detonation nanodiamond.Keywords: detonation nanodiamond particles, modified detonation nanodiamond, MW PACVD, haemocompatibilityCelem pracy jest przedstawienie innowacyjnego projektu systemu plazmy mikrofalowej z wykorzystaniem do modyfikacji detonacyjnych cząstek nanodiamontowych (DNP) przy użyciu specjalnego obrotowego bębna umieszczonego wewnątrz reaktora. Nanodiamontowe cząstki wytwarzane metodą detonacji wykazują aktywność biologiczną w zależności od funkcjonalizacji powierzchni. Plasmo-chemiczna modyfikacja detonacyjnych nanodiamontowych cząstek daje możliwość kontrolowania ich powierzchni w testach biologicznych. Autorzy w artykule porównali detonacyjny nanodiament (wielkość ziarna od 2 do 5 nm) ze zmodyfikowanym w obrotowej komorze reaktora, za pomocą procesu chemicznego osadzania wspomaganego plazmą mikrofalową (MW PACVD), detonacyjnym nanodiamentem. Wykorzystano badania materiałowe (Ramana i FT-IR spektroskopia) oraz badania in vitro na pełnej krwi ludzkiej. Badania wykazały hemozgodność niezmodyfikowanego detonacyjnego nanodiamentu i nanodiamentu zmodyfikowanego za pomocą metody MW PACVD w obrotowej komorze reaktora (zmodyfikowany ND-3) oraz obecność hemolizy w komercyjnym detonacyjnym nanodiamencie.

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Use of Raman scattering to investigate disorder and crystallite formation in as-deposited and annealed carbon films

Cited by 1,081 publications

References 8 publications

Temperature Dependence on Structural, Tribological, and Electrical Properties of Sputtered Conductive Carbon Thin Films

Temperature Dependence on Structural, Tribological, and Electrical Properties of Sputtered Conductive Carbon Thin Films

Influence of doping (Ti, V, Zr, W) and annealing on the sp2 carbon structure of amorphous carbon films

Haemocompatibility Of Non-Functionalized And Plasmachemical Functionalized Detonation Nanodiamond Particles

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