Studies on tuning surface electronic properties of hydrogenated diamond by oxygen functionalization

Sulthana, N. Mohasin; Ganesan, Kumaravelu; Ajikumar, P.K.; Dhara, Sandip

doi:10.1016/j.diamond.2022.109284

Cited by 5 publications

(5 citation statements)

References 40 publications

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“…One of the important observations in this study is the enhancement of sensor response for the partial O-terminated HD films. In the partial OHD films, a considerable amount of Ofunctional groups are present, as evidenced by X-ray photoelectron spectroscopy, as reported elsewhere [22]. The local catalytic activity of the surface increases drastically at O-functional groups on the H-diamond surface.…”

Section: Discussionsupporting

confidence: 66%

“…As can be seen in Fig. 2a, the morphology of the grown diamond film is having triangle and rectangle faceted structures associated with ( 111) and (100) planes, respectively [22,23]. Fig.…”

Section: Structural Analysismentioning

confidence: 86%

“…The microcrystalline diamond films were deposited on SiO2/Si using ultrahigh pure CH4 and H2 in the ratio of 1: 100 by hot filament chemical vapour deposition, as reported elsewhere [21,22]. Subsequent to growth, the in-situ hydrogen termination was carried out by admitting H2 into the chamber at a flow rate of 200 sccm for 20 min under working pressure of ~ 40 mbar.…”

Section: Methodsmentioning

confidence: 99%

“…The inset in (b) shows the magnified part of Raman band around 1332 cm -1 . Waals interaction of the H-terminated surface which weakens the water physisorption [22].…”

Section: Structural Analysismentioning

confidence: 99%

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Enhanced sensitivity of partial O-terminated H-diamond for H2S detection at room temperature

Sulthana,

Ganesan,

Ajikumar

2023

Diamond and Related Materials

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Section: Discussionsupporting

confidence: 66%

“…As can be seen in Fig. 2a, the morphology of the grown diamond film is having triangle and rectangle faceted structures associated with ( 111) and (100) planes, respectively [22,23]. Fig.…”

Section: Structural Analysismentioning

confidence: 86%

Section: Methodsmentioning

confidence: 99%

“…The inset in (b) shows the magnified part of Raman band around 1332 cm -1 . Waals interaction of the H-terminated surface which weakens the water physisorption [22].…”

Section: Structural Analysismentioning

confidence: 99%

See 2 more Smart Citations

Enhanced sensitivity of partial O-terminated H-diamond for H2S detection at room temperature

Sulthana,

Ganesan,

Ajikumar

2023

Diamond and Related Materials

Self Cite

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“…This decrease in chemical shift of the carbonyl group compared to molecular assignment can be understood as a final state core-hole relaxation (de-localisation) and is predicted to also occur in other carbon allotropes [35], and the {110} diamond surface [44]. Given the discrepancy with molecular C1s chemical shifts, care must be taken in interpreting implicit and explicit estimations of the carbonyl fraction of oxygenated diamond surfaces using XPS [3,34,37,45].…”

Section: Discussionmentioning

confidence: 99%

X-ray quantification of oxygen groups on diamond surfaces for quantum applications

Dontschuk,

Rodgers,

Chou

et al. 2023

Mater. Quantum. Technol.

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Identifying the surface chemistry of diamond materials is increasingly important for device applications, especially quantum sensors. Oxygen-related termination species are widely used because they are naturally abundant, chemically stable, and compatible with stable nitrogen vacancy centers near the diamond surface. Diamond surfaces host a mixture of oxygen-related species, and the precise chemistry and relative coverage of diﬀerent species can lead to dramatically diﬀerent electronic properties, with direct consequences for near-surface quantum sensors. However, it is challenging to unambiguously identify the diﬀerent groups or quantify the relative surface coverage. Here we show that a combination of X-ray absorption and photoelectron spectroscopies can be used to quantitatively identify the coverage of carbonyl functional groups on the {100} diamond surface. Using this method we reveal an unexpectedly high fraction of carbonyl groups (> 9%) on a wide range of sample surfaces. Furthermore, through a combination of ab initio calculations and spectroscopic studies of engineered surfaces, we reveal unexpected complexities in the X-ray spectroscopy of oxygen terminated diamond surfaces. Of particular note, we ﬁnd the binding energies of carbonyl-related groups on diamond diﬀers signiﬁcantly from other organic systems, likely resulting in previous widespread misestimation of carbonyl fractions on diamond surfaces.

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FIB in-situ fabrication of pseudo vertical diamond Schottky diode: H-terminated ohmic contact and O-terminated Schottky barrier

Valendolf,

Leinen,

Alba

et al. 2024

Applied Surface Science

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Studies on tuning surface electronic properties of hydrogenated diamond by oxygen functionalization

Cited by 5 publications

References 40 publications

Enhanced sensitivity of partial O-terminated H-diamond for H2S detection at room temperature

Enhanced sensitivity of partial O-terminated H-diamond for H2S detection at room temperature

X-ray quantification of oxygen groups on diamond surfaces for quantum applications

FIB in-situ fabrication of pseudo vertical diamond Schottky diode: H-terminated ohmic contact and O-terminated Schottky barrier

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