Effect of interaction between AC electric field and phonon oscillation of metal cluster on tip-growth of carbon nanotube |
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| Institution: | 1. Department of Physics, Shahid Rajaee Teacher Training University, Lavizan, 16788-15811 Tehran, Iran;2. Department of Chemistry, Shahid Rajaee Teacher Training University, Lavizan, 16788-15811 Tehran, Iran;1. Center for Cloud Computing and Big Data, Department of Automation, Xiamen University, Xiamen 361005, China;2. Institute of Theoretical Physics and Astrophysics, Department of Physics, Xiamen University, Xiamen 361005, China;1. State Key Laboratory of Complex Electromagnetic Environmental Effects on Electronics and Information System, National University of Defense Technology (NUDT), Changsha 410073, China;2. Center for Optical and Electromagnetic Research, State Key Lab of MOI, Zhejiang University, Hangzhou 310058, China |
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| Abstract: | The paper reports effect of interaction between AC electric field and metal cluster sitting at tip end of the carbon nanotube (CNT) on CNT tip-growth in CVD theoretically. For this purpose, a theoretical model based on phonon oscillations of the metal catalyst and influence of AC electric field on these oscillations is presented. Results show that there is an optimum AC electric field which optimizes growth of ultra-long CNTs. Then it is demonstrated that, in comparison with CNTs in the absence of field, CNTs under optimum electric field grow more. In addition, relation between optimum temperature and amplitude of AC electric field is investigated and it is shown that increasing electric field leads to higher optimum temperature. Finally, Investigation of effect of catalyst type on optimum electric field demonstrates the optimum field for various catalysts is different due to their different characteristics including van der Waals interaction with carbon, atomic mass and number of free charge carriers per each atom. All results are discussed and interpreted. |
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| Keywords: | Carbon nanotube Metal catalyst AC electric field Phonon oscillation Lennard-Jones potential |
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