Transition metal oxide-diamond interfaces for electron emission applications

Tiwari, Amit KumarSchool of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne (author)

Validerad; 2013; 20130301 (andbra)
Diamond surfaces with suitable adsorbed chemical species can exhibit both negative and positive electron affinities, arising from the complex electrostatic interplay between adsorbates and surface carbon atoms of diamond lattice. We present the results of density functional calculations into the energetics and the electron affinity of diamond (100) surfaces terminated with the oxides of selected transition metals. We find that for a correct stoichiometry, oxides of transition metals, such as Ti and Zn, exhibit a large negative electronic affinity of around 3 eV. The desorption of transition metal oxides is found to be highly endothermic. We therefore propose that transition metal oxides are promising for the surface coating of diamond-based electron emitters, as these exhibit higher thermal stability in comparison to the commonly used Cs-O termination, while retaining the advantage of inducing a large negative electron affinity

Goss, Jonathan P GSchool of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne (author)
Briddon, Patrick R.School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne (author)
Wright, Nicholas G.School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne (author)
Horsfall, Alton B.School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne (author)
Rayson, MarkLuleå tekniska universitet,Matematiska vetenskaper(Swepub:ltu)rayson (author)
School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon TyneMatematiska vetenskaper (creator_code:org_t)

In:Silicon carbide and related materials 2012Durnten-Zurich : Trans Tech Publications Inc., s. 761-7649783037856246

By the author/editor: Tiwari, Amit Kum ...; Goss, Jonathan P ...; Briddon, Patrick ...; Wright, Nicholas ...; Horsfall, Alton ...; Rayson, Mark

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Mathematics; and Computational Ma ...

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