Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (6): 60503-060503.doi: 10.11889/j.0253-3219.2016.hjs.39.060503

• NUCLEAR PHYSICS, INTERDISCIPLINARY RESEARCH • Previous Articles     Next Articles

Theoretical study on irradiation damage of metal-filled multi-walled carbon nanotubes

MA Jiawen1,2,3, GONG Wenbin4, ZHANG Wei1,3, XU Zijian1,3, WANG Chengbin1,3, REN Cuilan1,3, HUAI Ping1,3, ZHU Zhiyuan1,3   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Key Laboratory of Interfacial Physics and Technology, Chinese Academy of Sciences, Shanghai 201800, China;
    4 Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
  • Received:2016-03-11 Revised:2016-04-08 Online:2016-06-10 Published:2016-06-12
  • Supported by:

    Supported by National Natural Science Foundation of China (No.11205232, No.11505266, No.11075196), the Strategically Leading Program of Chinese Academy ofSciences (No.XDA02040100)

Abstract:

Background: Nuclear battery is a promising energy transfer device with outstanding performance. Since the 1950s, a lot of studies have been made onthe transfer of nuclear energy to electric energy through a small device. However, irradiation damage affects the efficiency and lifetime of nuclear battery. Popa-Simil proposed a theoretical model based on multi-walled carbon nanotubes (MWNTs) and metal which can achieve high energy transfer efficiency. The irradiation tolerance of MWNTs with metal embedded should be evaluated. Purpose: This studyaims to investigate the irradiation tolerance of the model of a multi-walled carbon nanotube with copper atoms embedded and compare it with one containing no cooper atoms to find out the effect of metal inside nanotubes on the irradiation tolerance. Methods: Based on empirical analytical potentials, molecular dynamics (MD) method was applied to investigate irradiation damage of the multi-walled nanotube structure with copper inside. We chose six incident energy points, which are 100eV, 200eV, 400eV, 600eV, 800eV and 1000eV, and each energy point contained 150 independent bombarding incidents. The system was annealed after the irradiation stage then the defects were counted and analyzed.Results: Three different defect types, which are the coordination defect, sputtered atoms and perfect structure defect (PST), and the total damage (defined as the summation of these three defect amounts) were evaluated as the irradiation tolerance of the system. In metal-filled MWNT system, the number of coordination defects, PST defects and total damage are smaller than that of independent MWNT system, while the number of sputtered atoms is similar with that of independent MWNT system, while some of its mechanism is different.Conclusion: With metal inside MWNTs, the total damage by irradiation is reduced and the irradiation tolerance of this system is promoted by metal. It can be used to improve performance of nuclear batteries as major materials.

Key words: Irradiation damage, Carbon nanotubes, Molecular dynamics, Nuclear battery

CLC Number: 

  • TL11