Field desorption microscopy of carbon-coated field electron emitters
D.P. Bernatskii, V.G. Pavlov
Abstract: Field electron emitters in the form of a metal tip with a carbon film on the surface have a number of promising operational properties. The characteristics of the emitter depend on the phase composition, thickness and uniformity of the film. Determining the parameters of films with a thickness of one or more monoatomic layers presents certain difficulties. In this paper, the formation and characteristics of carbon nanostructures on the surface of field emitters made of iridium and rhenium are studied using continuous-mode field desorption microscopy. In the field desorption images, the regions of carbon nanostructures appear as local flashes (avalanche-like desorption). Frame-by-frame analysis of flash video recordings revealed several stages of the flash formation and revealed differences in the desorption from carbon nanostructures on iridium and rhenium. The found differences are explained by formation of the single-layer graphene on iridium and a multilayer graphene on rhenium. Desorption images reveal inhomogeneities and local differences in the film thickness. It is shown that continuous-mode field desorption microscopy makes it possible to determine the regularities of formation of the field desorption images of various carbon nanostructures, in particular, the single-layer and multilayer graphene on the surface of the field emitter, and to diagnose the surface after carburization. Besides, control the uniformity of the resulting coating is possible. The obtained data are useful for developing technology of the effective field electronic emitters.
Keywords: field desorption, carbon, nanostructures, rhenium, iridium, field emitters
- Dmitrii P. Bernatskii – Ph. D., Senior Researcher, Ioffe Institute
- Victor G. Pavlov – Dr. Sc., Senior Researcher, Ioffe Institute
Bernatskii, D.P. Field desorption microscopy of carbon-coated field electron emitters / D.P. Bernatskii, V.G. Pavlov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. – Tver: TSU, 2021. — I. 13. — P. 25-31. DOI: 10.26456/pcascnn/2021.13.025. (In Russian).
Full article (in Russian): download PDF file
1. Nanofabrication using focused ion and electron. Principles and applications, ed. by I. Utke, S. Moshkalev, P. Russell, Oxford, Oxford University Press, 2012, 380 p.
2. Williams D.B., Carter C.B. Electron Sources, Transmission Electron Microscopy. A Textbook for Materials Science. Boston, Springer, 2012, chapter 5, pp. 73-89. DOI: 10.1007/978-0-387-76501-3_5.
3. Alyamani A., Lemine O. FE-SEM characterization of some nanomaterial, Scanning electron microscopy, ed. V. Kazmiruk. Rijeka, Croatia, Intech, 2012, pp. 463-472. DOI: 10.5772/34361.
4. Forbes R.G. Low-macroscopic-field electron emission from carbon films and other electrically nanostructured heterogeneous materials: hypotheses about emission mechanism, Solid-State Electronics, 2001, vol. 45, issue 6, pp. 779-808. DOI: 10.1016/S0038-1101(00)00208-2.
5. Xu N.S., Huq S.E. Novel cold cathode materials and applications, Materials Science and Engineering: R: Reports, 2005, vol. 48, issue 2-5, pp. 47-189. DOI: 10.1016/j.mser.2004.12.001.
6. Liu J., Zeng B., Wang W. et al. Graphene electron cannon: High-current edge emission from aligned graphene sheets, Applied Physics Letters, 2014, vol. 104, issue 2, pp. 023101-1-023101-4. DOI: 10.1063/1.4861611.
7. Pandey S., Rai P., Patole S. et al. Improved electron field emission, from morphologically disordered monolayer grapheme, Applied Physics Letters, 2012, vol. 100, issue 4, pp. 043104-1-043104-4. DOI: 10.1063/1.3679135.
8. Sominskii G.G., Tumareva T.A., Taradaev E.P. et al. Annular multi-tip field emitters with metal–fullerene protective coating, Technical Physics, 2019, vol. 64, issue 2, pp. 270-273. DOI: 10.1134/S106378421902021X.
9. Muller E.W., Tsong T.T. Field ion microscopy, field ionization and field evaporation, Progress in Surface Science, 1974, vol. 4, 139 p. DOI: 10.1016/S0079-6816(74)80005-5.
10. Bernatskii D.P., Pavlov V.G. Investigation of a solid surface using continuous-mode field-desorption microscopy, Bulletin of the Russian Academy of Sciences: Physics, 2009, vol. 73, issue 5, pp. 673-675. DOI: 10.3103/S1062873809050438.
11. Suchorski Y. Field ion and field desorption microscopy: principles and applications, Surface Science Tools for Nanomaterials Characterization, ed. by C.S.S.R. Kumar. Berlin, Heidelberg, Springer, 2015, pp. 227-272. DOI: 10.1007/978-3-662-44551-8_7.
12. Rut’kov E.V., Gall N.R. Equilibrium nucleation, growth and thermal stability of graphene on solids, Physics and applications of grapheme – Experiments, ed. by S. Mikhailov. Rijeka, Croatia, InTech, 2011, pp. 209-292. DOI: 10.5772/14999.
13. Rut’kov E.V., Gall’ N.R. The determining influence of the perimeter of graphene islands on phase equilibria in graphene–metal system containing dissolved carbon, Physics of the Solid State, 2020, vol. 62, issue 3, pp. 580-585. DOI: 10.1134/S1063783420030191.
14. Rut’kov E.V., Gall N.R. Intercalation of graphene films on metals with atoms and molecules, Physics and applications of grapheme – Experiments, ed. by S. Mikhailov. Rijeka, Croatia, InTech, 2011, pp. 293-326. DOI: 10.5772/15362.