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Moradi Marjaneh A, Saadatmand D, Evazzade I, Babicheva RI, Soboleva EG, Srikanth N, Zhou K, Korznikova EA, Dmitriev SV. Mass transfer in the Frenkel-Kontorova chain initiated by molecule impact. Phys Rev E 2018; 98:023003. [PMID: 30253582 DOI: 10.1103/physreve.98.023003] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Indexed: 11/07/2022]
Abstract
The Frenkel-Kontorova chain with a free end is used to study initiation and propagation of crowdions (antikinks) caused by impact of a molecule consisting of K atoms. It is found that molecules with 1<K<10 are more efficient in the initiation of crowdions as compared to a single atom (K=1) because the total energy needed to initiate the crowdions by molecules is smaller. This happens because a single atom can initiate in the chain only sharp, fast-moving crowdions that require relatively large energy. A molecule has finite length, and that is why it is able to excite a wider crowdion with a smaller velocity and smaller energy. Our results can shed light on the atomistic mechanisms of mass transfer in crystals subject to atom and molecule bombardment.
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Affiliation(s)
- A Moradi Marjaneh
- Young Researchers and Elite Club, Quchan Branch, Islamic Azad University, Quchan, Iran
| | - Danial Saadatmand
- Department of Physics, University of Sistan and Baluchestan, Zahedan, Iran
| | - I Evazzade
- Department of Physics, Faculty of Science, Ferdowsi University of Mashhad, 91775-1436, Mashhad, Iran
| | - R I Babicheva
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore
| | - E G Soboleva
- Yurga Institute of Technology (Branch), National Research Tomsk Polytechnic University, 652050 Yurga, Russia
| | - N Srikanth
- Interdisciplinary Graduate School, Nanyang Technological University, Singapore 639798, Singapore
| | - Kun Zhou
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore
| | - E A Korznikova
- Institute for Metals Superplasticity Problems, Russian Academy of Sciences, Ufa, 450001 Russia.,Ufa State Aviation Technical University, 450008, Ufa, Russia
| | - S V Dmitriev
- Institute for Metals Superplasticity Problems, Russian Academy of Sciences, Ufa, 450001 Russia.,National Research Tomsk State University, Lenin Avenue 36, 634050 Tomsk, Russia
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Cao Q, Zhang J, Du J, Zhao H, Liu S, Peng Q. Athermal repair of nanoscale defects in optical materials using a femtosecond laser. NANOSCALE 2017; 9:17233-17240. [PMID: 28702637 DOI: 10.1039/c7nr01599b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Ion implantation is widely used to fabricate advanced optical and optoelectronic materials and devices. However, nanoscale defects generated during the ion implantation process severely affect the quality and properties of the material and device. Here, combining computational simulations and experiments, we investigate the mechanism for defect repair in fused silica after Cu ion implantation using femtosecond laser irradiation with an energy fluence much lower than the ablation threshold. Atomic force microscopy demonstrates no unexpected ablation. The optical absorption spectra show that various types of defects with formation energies between 1.9 and 6.2 eV can be repaired successfully via an athermal procedure. The Raman spectra imply that the broken chemical bonds reconnect after femtosecond laser irradiation. Our study reveals that low-energy femtosecond laser irradiation can transfer the appropriate energy needed to repair defects; thus it could be useful in fabricating nonlinear optical devices due to its high spatial selectivity and convenience.
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Affiliation(s)
- Qiang Cao
- Laser Micro/NanoFabrication Laboratory, NanoManufacturing Fundamental Research Joint Laboratory of National Science Foundation of China, School of Mechanical Engineering, Beijing Institute of Technology, 100081, PR China.
| | - Jiajun Zhang
- Laser Micro/NanoFabrication Laboratory, NanoManufacturing Fundamental Research Joint Laboratory of National Science Foundation of China, School of Mechanical Engineering, Beijing Institute of Technology, 100081, PR China.
| | - Jian Du
- Science and Technology on Special System Simulation Laboratory, Beijing Simulation Center, Beijing, 100854, PR China
| | - Hongming Zhao
- Science and Technology on Special System Simulation Laboratory, Beijing Simulation Center, Beijing, 100854, PR China
| | - Sheng Liu
- Key Laboratory of Hydraulic Machinery Transient, Ministry of Education, Wuhan University, Wuhan, 430072, China and The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
| | - Qing Peng
- Key Laboratory of Hydraulic Machinery Transient, Ministry of Education, Wuhan University, Wuhan, 430072, China and The Institute of Technological Sciences, Wuhan University, Wuhan 430072, China and Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109, USA.
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Peng Q, Ji W, Lian J, Gao F, Peng S, Huang H, De S. A first-principles study of the avalanche pressure of alpha zirconium. RSC Adv 2016. [DOI: 10.1039/c6ra13752k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The critical swelling pressure, the avalanche pressure, is Pa = −15 GPa for alpha zirconium.
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Affiliation(s)
- Qing Peng
- Department of Mechanical
- Aerospace and Nuclear Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - Wei Ji
- Department of Mechanical
- Aerospace and Nuclear Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - Jie Lian
- Department of Mechanical
- Aerospace and Nuclear Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - Fei Gao
- Department of Nuclear Engineering and Radiological Science
- University of Michigan
- Ann Arbor
- USA
| | - Shuming Peng
- Institute of Nuclear Physics and Chemistry
- China Academy of Engineering Physics
- Mianyang 621900
- China
| | - Hanchen Huang
- Department of Mechanical and Industrial Engineering
- Northeastern University
- Boston
- USA
| | - Suvranu De
- Department of Mechanical
- Aerospace and Nuclear Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
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