Structure, electronics, and interaction of hydrogen and oxygen on diamond surfaces

Sque, S. J.; Jones, R.; Briddon, P.R.

doi:10.1103/physrevb.73.085313

Cited by 243 publications

(244 citation statements)

References 63 publications

Supporting

Mentioning

195

Contrasting

Order By: Relevance

“…In the second round, the surface was oxygen terminated using low-temperature (450°C ) annealing in air 35 . O-termination represents the standard hydrophilic surface termination of diamond 36 . In the third round, the oxygen termination was converted to fluorine termination using CF 4 plasma 37 .…”

Section: Resultsmentioning

confidence: 99%

Single-crystal diamond nanomechanical resonators with quality factors exceeding one million

et al. 2014

View full text Add to dashboard Cite

Diamond has gained a reputation as a uniquely versatile material, yet one that is intricate to grow and process. Resonating nanostructures made of single-crystal diamond are expected to possess excellent mechanical properties, including high-quality factors and low dissipation. Here we demonstrate batch fabrication and mechanical measurements of single-crystal diamond cantilevers with thickness down to 85 nm, thickness uniformity better than 20 nm and lateral dimensions up to 240 mm. Quality factors exceeding one million are found at room temperature, surpassing those of state-of-the-art single-crystal silicon cantilevers of similar dimensions by roughly an order of magnitude. The corresponding thermal force noise for the best cantilevers is B5 Á 10 À 19 N Hz À 1/2 at millikelvin temperatures. Single-crystal diamond could thus directly improve existing force and mass sensors by a simple substitution of resonator material. Presented methods are easily adapted for fabrication of nanoelectromechanical systems, optomechanical resonators or nanophotonic devices that may lead to new applications in classical and quantum science.

show abstract

Section: Resultsmentioning

confidence: 99%

Single-crystal diamond nanomechanical resonators with quality factors exceeding one million

et al. 2014

View full text Add to dashboard Cite

show abstract

“…refs [29,30]), there is tentative agreement in the literature that this structure is the lowest-energy ideal C(100)-(1x1):O structure and is therefore the appropriate energetic ground state. 22,[31][32][33][34] The adsorption energy per atom is then given by: (1) where E T is the total energy of the supercell, E 0 is the total energy of the bare oxygen-terminated surface supercell, N ads is the number of adsorbates in the supercell and E iso is the energy of an isolated adsorbate atom. The computed values of E T , E O and E iso are negative, thus the sign convention in this work is that exothermic adsorption energies are negative.…”

Section: Methodsmentioning

confidence: 99%

Light Metals on Oxygen-Terminated Diamond (100): Structure and Electronic Properties

2015

View full text Add to dashboard Cite

Recently a lithiated C(100)- (1x1):O surface has been demonstrated to possess a true negative electron affinity, i.e. the conduction band minimum at the surface is lower in energy than the local vacuum level. Here we present a density functional theory study of diamond surfaces with various alkali-metal-and alkaline-earth-oxide terminations. We find a size-dependent variation of electronic surface properties that divides the adsorbates into two groups. In both cases, ether bridges are broken. Adsorption of the smaller alkali metals/alkaline earths such as lithium and magnesium leads to a significant surface dipole resulting from transfer of charge across X-O-C complexes, whereas at the other extreme, caesiumadsorbed and potassium-adsorbed C(100)-(1x1):O surfaces exhibit conventional dipole formation between the ionic adsorbate and a negatively charged carbonyl-like surface. Sodium is intermediate. Computed surface band structures and density of states are presented illustrating the key electronic differences between these two groups.

show abstract

“…43 This is in consistent with IS result that H-terminated diamond surface changes to O-terminated in the T a range of 725-800 o C. The H-terminated diamond surface had localized surface states in the band gap which would comprise the electron conductivity in n-type doping as they were expected to act as electron traps. 44 The dramatically reduced value of the resistance of diamond grains in sample 900-A reveals the surface change of grains after 900 o C annealing. The energy band structure at the surface of oxidized UNCD films showed a large density of states within the expected diamond band gap resulting from sp 2 carbon in the GBs or other surface states related to the termination.…”

Section: (B)mentioning

confidence: 99%

An insight of p-type to n-type conductivity conversion in oxygen ion-implanted ultrananocrystalline diamond films by impedance spectroscopy

Coathup

et al. 2017

Applied Physics Letters

View full text Add to dashboard Cite

The impedance spectroscopy measurements were used to investigate the separated contributions of diamond grains and grain boundaries (GBs), giving an insight of p-type to ntype conductivity conversion in O + -implanted ultrananocrystalline diamond (UNCD) films. It is found that both diamond grains and GBs promote the conductivity in O + -implanted UNCD films, in which GBs make at least half contribution. The p-type conductivity in O + -implanted samples is a result of H-terminated diamond grains, while n-type conductive samples is closely correlated to O-terminated O + -implanted diamond grains and GBs in the films. The results also suggest that low resistance of GBs is preferable to obtain high mobility n-type conductive UNCD film.

show abstract

Structure, electronics, and interaction of hydrogen and oxygen on diamond surfaces

Cited by 243 publications

References 63 publications

Single-crystal diamond nanomechanical resonators with quality factors exceeding one million

Single-crystal diamond nanomechanical resonators with quality factors exceeding one million

Light Metals on Oxygen-Terminated Diamond (100): Structure and Electronic Properties

An insight of p-type to n-type conductivity conversion in oxygen ion-implanted ultrananocrystalline diamond films by impedance spectroscopy

Contact Info

Product

Resources

About