XPS and ToF-SIMS investigation of nanocrystalline diamond oxidized surfaces

Torrengo, S.; Canteri, R.; Dell’Anna, Rossana; Minati, L.; Pasquarelli, A.; Speranza, G.

doi:10.1016/j.apsusc.2013.03.041

Cited by 41 publications

(21 citation statements)

References 71 publications

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“…Usually, in the XPS spectra of carbon materials the CHx band is not fitted as it is presumably small, and close to the much bigger sp 3 C–C peak [ 17 , 50 , 51 ]. However, diamond films deposited by CVD technique are inherently terminated by hydrogen, because during deposition process hydrogen makes 92–99% of all reactive gases [ 52 ].…”

Section: Resultsmentioning

confidence: 99%

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The Effect of Surface Treatment on Structural Properties of CVD Diamond Layers with Different Grain Sizes Studied by Raman Spectroscopy

et al. 2021

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Extensive Raman spectroscopy studies combined with scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) measurements were performed to investigate structural and chemical changes in diamond layers deposited by chemical vapour deposition (CVD) upon post-growth treatment with hydrogen. The aim of this study is to characterize the changes in micro-structural properties of diamond layers with different grain sizes and different contents of sp2 carbon phase. Hydrogenation or oxidization of diamond layer surface is often performed to modify its properties; however, it can also strongly affect the surface structure. In this study, the impact of hydrogenation on the structure of diamond layer surface and its chemical composition is investigated. Owing to their polycrystalline nature, the structural properties of CVD diamond layers can strongly differ within the same layer. Therefore, in this project, in order to compare the results before and after hydrogen treatment, the diamond layers are subjected to Raman spectroscopy studies in the vicinity of a T-shape marker fabricated on the surface of each diamond layer studied.

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Section: Resultsmentioning

confidence: 99%

“…In comparison to other large band gap semiconductors, diamond surface is rather easy to functionalize and its properties are easy to modify [ 16 , 17 ]. The usual route to oxidise or hydrogenate a diamond surface is its exposure to oxygen or hydrogen plasma.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Surface Treatment on Structural Properties of CVD Diamond Layers with Different Grain Sizes Studied by Raman Spectroscopy

et al. 2021

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“…The mixture of H 2 SO 4 and H 2 O 2 (called piranha solution) was used as an oxidizing agent in many fields over the past few decades. [ 42–44 ] For graphite, Lu et al. reported the reaction of carbon materials in the mixture of H 2 O 2 and H 2 SO 4 , and claimed the carbonation would be generated and thus accelerate the H 2 O 2 decomposition, and keep the sufficient O 2 generation constantly.…”

Section: Resultsmentioning

confidence: 99%

Understanding Oxygen Bubble‐Triggered Exfoliation of Graphite Toward the Low‐Defect Graphene

Yang

Zhang

Liu

et al. 2021

Adv Materials Inter

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Although graphene has been developed and widely used in many fields over the past decades, the effect of oxygen (O2) on the exfoliation of graphite is still unclear. Here, a simple bubble‐triggered exfoliation method is employed for controllable synthesis of graphene nanoplatelets (GNPs) with low‐oxidation level and high electrical conductivity. The exfoliation process is studied and a formation mechanism for the synthesis of the low‐defect GNPs is proposed. The results show that the synergistic effect of H2SO4 and H2O2 plays an important role in the procession of exfoliation of graphite. Moreover, density functional theory (DFT) simulations exhibit that H2O2 would preferentially adsorb on the edge of graphite, indicating the possibility to initiate the exfoliation by O2. In the whole process, some oxygen free radicals can be released from H2O2, resulting in some O2 and oxygen functional groups formed on the graphite edge, and which can finally lead to the fast exfoliation of graphite. In addition, a time‐dependent temperature profile under an applied voltage of 5 V exhibits a steady‐state with temperature up to 275 °C. Overall, this work elucidates the selectivity of gas bubble absorbed on the side edge of graphite and presents a potential application for high‐electrical conductivity graphene.

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“…The proposed simple bond C-O groups were reported to be the most energetically favorable for (100) diamond [ 19 ]. The position of oxygen groups was set according to previous XPS studies [ 9 , 15 , 34 , 43 ]. In principle, it is difficult to discern if the oxygen groups are related to sp 3 or sp 2 carbon groups because the peak positions are analogous to that of graphite and graphite oxide [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

Surface States of (100) O-Terminated Diamond: Towards Other 1 × 1:O Reconstruction Models

et al. 2020

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Diamond surface properties show a strong dependence on its chemical termination. Hydrogen-terminated and oxygen-terminated diamonds are the most studied terminations with many applications in the electronic and bioelectronic device field. One of the main techniques for the characterization of diamond surface terminations is X-ray photoelectron spectroscopy (XPS). In this sense, the use of angle-resolved XPS (ARXPS) experiments allows obtaining depth-dependent information used here to evidence (100)-O-terminated diamond surface atomic configuration when fabricated by acid treatment. The results were used to compare the chemistry changes occurring during the oxidation process using a sublayer XPS intensity model. The formation of non-diamond carbon phases at the subsurface and higher oxygen contents were shown to result from the oxygenation treatment. A new (100) 1 × 1:O surface reconstruction model is proposed to explain the XPS quantification results of O-terminated diamond.

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XPS and ToF-SIMS investigation of nanocrystalline diamond oxidized surfaces

Cited by 41 publications

References 71 publications

The Effect of Surface Treatment on Structural Properties of CVD Diamond Layers with Different Grain Sizes Studied by Raman Spectroscopy

The Effect of Surface Treatment on Structural Properties of CVD Diamond Layers with Different Grain Sizes Studied by Raman Spectroscopy

Understanding Oxygen Bubble‐Triggered Exfoliation of Graphite Toward the Low‐Defect Graphene

Surface States of (100) O-Terminated Diamond: Towards Other 1 × 1:O Reconstruction Models

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