中国物理B ›› 2016, Vol. 25 ›› Issue (4): 46106-046106.doi: 10.1088/1674-1056/25/4/046106

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Channeling of fast ions through the bent carbon nanotubes: The extended two-fluid hydrodynamic model

Lazar Karbunar, Duško Borka, Ivan Radović, Zoran L Mišković   

  1. 1 School of Electrical Engineering, University of Belgrade, Bulevar Kralja Aleksandra 73, 11120 Belgrade, Serbia;
    2 Vinča Institute of Nuclear Sciences, University of Belgrade, P. O. Box 522, 11001 Belgrade, Serbia;
    3 Department of Applied Mathematics and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
  • 收稿日期:2015-08-14 修回日期:2015-12-03 出版日期:2016-04-05 发布日期:2016-04-05
  • 通讯作者: Duško Borka E-mail:ziloot@verat.net
  • 基金资助:
    Project supported by the Funds from the Ministry of Education, Science and Technological Development of the Republic of Serbia (Grant No. 45005). Z. L. Mišković thanks the Natural Sciences and Engineering Research Council of Canada for Finacial Support.

Channeling of fast ions through the bent carbon nanotubes: The extended two-fluid hydrodynamic model

Lazar Karbunar1, Duško Borka2, Ivan Radović2, Zoran L Mišković3   

  1. 1 School of Electrical Engineering, University of Belgrade, Bulevar Kralja Aleksandra 73, 11120 Belgrade, Serbia;
    2 Vinča Institute of Nuclear Sciences, University of Belgrade, P. O. Box 522, 11001 Belgrade, Serbia;
    3 Department of Applied Mathematics and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
  • Received:2015-08-14 Revised:2015-12-03 Online:2016-04-05 Published:2016-04-05
  • Contact: Duško Borka E-mail:ziloot@verat.net
  • Supported by:
    Project supported by the Funds from the Ministry of Education, Science and Technological Development of the Republic of Serbia (Grant No. 45005). Z. L. Mišković thanks the Natural Sciences and Engineering Research Council of Canada for Finacial Support.

摘要: We investigate the interactions of charged particles with straight and bent single-walled carbon nanotubes (SWNTs) under channeling conditions in the presence of dynamic polarization of the valence electrons in carbon. This polarization is described by a cylindrical, two-fluid hydrodynamic model with the parameters taken from the recent modelling of several independent experiments on electron energy loss spectroscopy of carbon nano-structures. We use the hydrodynamic model to calculate the image potential for protons moving through four types of SWNTs at a speed of 3 atomic units. The image potential is then combined with the Doyle-Turner atomic potential to obtain the total potential in the bent carbon nanotubes. Using that potential, we also compute the spatial and angular distributions of protons channeled through the bent carbon nanotubes, and compare the results with the distributions obtained without taking into account the image potential.

关键词: nanotubes, channeling, dynamic polarization

Abstract: We investigate the interactions of charged particles with straight and bent single-walled carbon nanotubes (SWNTs) under channeling conditions in the presence of dynamic polarization of the valence electrons in carbon. This polarization is described by a cylindrical, two-fluid hydrodynamic model with the parameters taken from the recent modelling of several independent experiments on electron energy loss spectroscopy of carbon nano-structures. We use the hydrodynamic model to calculate the image potential for protons moving through four types of SWNTs at a speed of 3 atomic units. The image potential is then combined with the Doyle-Turner atomic potential to obtain the total potential in the bent carbon nanotubes. Using that potential, we also compute the spatial and angular distributions of protons channeled through the bent carbon nanotubes, and compare the results with the distributions obtained without taking into account the image potential.

Key words: nanotubes, channeling, dynamic polarization

中图分类号:  (Channeling phenomena (blocking, energy loss, etc.) ?)

  • 61.85.+p
41.75.Ht (Relativistic electron and positron beams) 61.82.Rx (Nanocrystalline materials)