Electron emission from H-terminated diamond enhanced by polypyrrole grafting

0541754 - FZÚ 2022 RIV US eng J - Journal Article
Ukraintsev, Egor - Kromka, Alexander - Janssen, W. - Haenen, K. - Takeuchi, D. - Bábor, P. - Rezek, B.
Electron emission from H-terminated diamond enhanced by polypyrrole grafting.
Carbon. Roč. 176, May (2021), s. 642-649. ISSN 0008-6223. E-ISSN 1873-3891
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA MŠMT LM2018110
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : diamond * surfaces * electron emission * electron affinity * polypyrrole * Kelvin probe
OECD category: Nano-materials (production and properties)
Impact factor: 11.307, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.carbon.2020.12.043

Electron emission plays an important role in diverse applications, from cold cathodes to chemical processes (solvated electrons, water purification), energy generation (thermionic or dye-sensitized solar cells), and even cancer treatment. Here we show that by surface treatment using electrochemically grown polypyrrole the secondary-electron emission and photoelectron emission from boron-doped diamond is enhanced even above the intensity of electron emission from the hydrogen-terminated surface with negative electron affinity. This enhancement is stable in air for at least one month and it persists also in vacuum after thermal annealing. Scanning electron microscopy, Kelvin probe force microscopy, total photoelectron yield spectroscopy as well as surface mapping by Auger and secondary ion mass spectroscopies are used to characterize and correlate the surface electronic and chemical properties. A model of the electron emission enhancement is provided.
Permanent Link: http://hdl.handle.net/11104/0319298