Oxygen-terminated diamond: insights into the correlation between surface oxygen configurations and work function values

Zulkharnay, Ramiz; Zulpukarova, Gulnur; May, Paul W.

doi:10.1016/j.apsusc.2024.159776

Applied Surface Science

2024

DOI: 10.1016/j.apsusc.2024.159776

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Oxygen-terminated diamond: insights into the correlation between surface oxygen configurations and work function values

Ramiz Zulkharnay,

Gulnur Zulpukarova,

Paul W. May

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Cited by 7 publications

References 46 publications

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Synthesis, Surface Chemistry, and Applications of Non‐Zero‐Dimensional Diamond Nanostructures

Li,

Jiang,

Yang

2024

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Diamond nanomaterials are renowned for their exceptional properties, which include the inherent attributes of bulk diamond. Additionally, they exhibit unique characteristics at the nanoscale, including high specific surface areas, tunable surface structure, and excellent biocompatibility. These multifaceted attributes have piqued the interest of researchers globally, leading to an extensive exploration of various diamond nanostructures in a myriad of applications. This review focuses on non‐zero‐dimensional (non‐0D) diamond nanostructures including diamond films and extended diamond nanostructures, such as diamond nanowires, nanoplatelets, and diamond foams. It delves into the fabrication, modification, and diverse applications of non‐0D diamond nanostructures. This review begins with a concise review of the preparation methods for different types of diamond films and extended nanostructures, followed by an exploration of the intricacies of surface termination and the process of immobilizing target moieties of interest. It then transitions into an exploration of the applications of diamond films and extended nanostructures in the fields of biomedicine and electrochemistry. In the concluding section, this article provides a forward‐looking perspective on the current state and future directions of diamond films and extended nanostructures research, offering insights into the opportunities and challenges that lie ahead in this exciting field.

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Synthesis, Surface Chemistry, and Applications of Non‐Zero‐Dimensional Diamond Nanostructures

Li,

Jiang,

Yang

2024

Small

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Enhanced Electron Emission Performance and Air‐Surface Stability in ScO‐Terminated Diamond for Thermionic Energy Converters

Zulkharnay,

Fox,

May

2024

Small

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Diamond with negative electron affinity (NEA) and low work function surfaces are suggested as a suitable material for electron‐generation applications in vacuum, in particular, as the emitter electrode in thermionic energy converters. Such NEA surfaces can be fabricated by evaporating and then annealing submonolayers of a suitable metal in vacuo onto bare or oxidized diamond. Among the metals studied, scandium termination of bare diamond (100) and (111) surfaces is recently reported to give the largest NEA values reported to date for a metal‐diamond system, as well as being thermally stable to 900 °C. It is now shown that preoxidized (100) diamond functionalized with 0.25 monolayers of Sc also produces a large NEA value of −1.02 eV with low work functions (<3.63 eV). Moreover, this surface is thermally stable to 700 °C and can withstand exposure to air for extended periods. Here, the structural and electronic properties of this Sc─O‐functionalized diamond surface are characterized in detail using a variety of surface‐science techniques. The results suggest that this material may be the ideal candidate for the fabrication of commercial thermionic energy conversion devices, e.g., for solar‐power generation, as well as for various other electronic devices that rely upon electron emission.

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Effect of structural and compositional alterations on the adsorption and selectivity of CO2 in hazelnut shell-derived activated carbons

Xie,

Wang,

Wang

et al. 2024

J Porous Mater

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Oxygen-terminated diamond: insights into the correlation between surface oxygen configurations and work function values

Cited by 7 publications

References 46 publications

Synthesis, Surface Chemistry, and Applications of Non‐Zero‐Dimensional Diamond Nanostructures

Synthesis, Surface Chemistry, and Applications of Non‐Zero‐Dimensional Diamond Nanostructures

Enhanced Electron Emission Performance and Air‐Surface Stability in ScO‐Terminated Diamond for Thermionic Energy Converters

Effect of structural and compositional alterations on the adsorption and selectivity of CO2 in hazelnut shell-derived activated carbons

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