JJP » JJP Issues
 Jordanian Journals
Editorial Board
International Advisory Board
Manuscript Organization
Instructions to Authors
Publication Ethics  
JJP Issues  
Contact Address


Field Electron Emission Characteristics of Tungsten–Polyethylene Composite Material As a Source of Electron Emission

Nizar A. Abu-Najma, Moneeb T. M. Shatnawia, Mohammad M. Allahamb,c and Marwan S. Mousad

 a Department of Physics, The University of Jordan, Amman 11942, Jordan.

b Institute of Scientific Instruments of CAS, Královopolská 147, 612 64 Brno, Czech Republic.

c Central European Institute of Technology, Brno University of Technology, Purkyňova 123, 612 00 Brno, Czech Republic.

d Department of Physics, Mu'tah University, Al-Karak 61710, Jordan.

Corresponding Author:  Marwan S. Mousa                                       Email: mmousa@mutah.edu.jo

Doi : https://doi.org/10.47011/15.5.11

Cited by : Jordan J. Phys., 15 (5) (2022) 537-545


Received on: 12/08/2021;                             Accepted on: 07/10/2021

Abstract: This work provides an experimental study on the effects of polyethylene coating on the field electron emission characteristics of clean (uncoated) tungsten tips. Several tungsten tips, with different apex radii, have been prepared, coated with different thicknesses of polyethylene layers and then examined using a standard field electron emission microscope. Various field electron emission characteristics have been measured under high-vacuum conditions. These include current-voltage characteristics, Fowler-Nordheim plots, scanning electron micrographs and spatial current distributions (electron-emission images). Based on this work, it is proved that coating tungsten tips with polyethylene layers has caused dramatic improvements on the tip emission properties. In particular, coating the tips improves the current-voltage characteristics, which is reflected in lowering the extraction voltage, getting more stable emission currents, expressing the current-voltage characteristics using Fowler-Nordheim plots and finally, the spatial distributions of the emitted electrons for the coated tips are more stable and uniform.

Keywords: Field electron emitter, Polyethylene dielectric layer, Composite emitter, Field electron microscope, Scanning electron microscope.



[1] Latham, R.V. and Mousa, M.S., J. Phys. D: Appl. Phys., 19 (1986) 699.

[2] Mousa, M.S., Surf. Interface Anal., 39 (2007) 102.

[3] Fowler, R.H. and Nordheim, Dr.L., Proc. R. Soc. A., 119 (781) (1928) 173.

[4] Forbes, R.G., Nanotechnology, 23 (2012) 095706 (12 pp).

[5] Lea, C., J. Phys. D, 10 (1977) L195.

[6] Latham, R.V. and Wilson, D.A., J. Phys. D, 14 (1981) 2139.

[7] Braun, E., Smith, J.F. and Sykes, D.E., Vacuum, 25 (1975) 425.

[8] Mousa, M.S., Surface Sci., 266 (1992) 110.

[9] Mousa, M.S. and Kelly, T.F., Ultramicroscopy, 95 (2003) 125.

[10] Latham, R.V. and Salim, M.A., J. Phys. E. Sci. Instrum., 20 (1987) 181.

[11] Knápek, A., Sobola, D., Burda, D., Daňhel, A., Mousa, M.S. and Kolařík, V., Nanomaterials, 9 (2019) 1756.

[12] Saqib, M., Jelenc, J., Pirker, L., Škapin, S.D., Pietro, L.D., Ramsperger, U., Knápek, A., Müllerová, I. and Remškar, M., J. Electron Spectrosc. Relat. Phenom., 241, (2020) 146837.

[13] Kaspar, P., Sobola, D., Částková, K., Knápek, A., Burda, D., Orudzhev, F., Dallaev, R., Tofel, P., Trčka, T., Grmela, L. and Hadaš, Z., Polymers, 12 (12) (2020) 2766.

[14] Madanat, M.A., Mousa, M.S., Al-Rabadi, A.N. and Fischer, A., Jordan J. Phys., 8 (2015) 79.

[15] Mousa, M.S., Vacuum, 39 (1988) 835.

[16] Braun, E., Smith, J.F. and Sykes, D.E., Vacuum, 25 (1975) 425.

[17] Bayliss, K.H. and Latham, R.V., Vacuum, 35 (1985) 211.

[18] Al-Qudah, A.M., Mousa, M.S. and Fischer, A., IOP Conf. Ser. Mater. Sci. Eng., 92 (2015) 012021.

[19] Mousa, M.S., Fischer, A. and Mussa, K.O., Jordan J. Phys., 1 (2012) 21.

[20] Forbes, R.G., Deane, J.H., Hamid, N. and Sim, H.S., J. Vac. Sci. Technol. B, 22 (2004) 1222.

[21] Al-Hussein, M., de Jeu, W.H., Lohmeijer, B.G.G. and Schubert, U.S., Macromolecules, 38 (2005) 2832.

[22] Forbes, R.G., Proc. R. Soc. A., 469 (2013) 20130271.

[23] Allaham, M.M., Forbes, R.G., Knápek, A. and Mousa, M.S., J. Elec. Eng. Slovak, 71 (2020) 37.

[24] Karpowicz, A. and Surma, S., Surface Science, 213 (2-3) (1989) 393.

[25] Alnawasreh, S.S., Al-Qudah, A.M., Madanat, M.A., Bani Ali, E.S., Almasri, A.M. and Mousa M.S., Applied Microscopy, 46 (4) (2016) 227.