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Islam ASJ, Islam MS, Mim NZ, Akbar MS, Hasan MS, Islam MR, Stampfl C, Park J. Vacancy-Induced Thermal Transport and Tensile Mechanical Behavior of Monolayer Honeycomb BeO. ACS Omega 2022; 7:4525-4537. [PMID: 35155944 PMCID: PMC8829849 DOI: 10.1021/acsomega.1c06491] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 01/14/2022] [Indexed: 06/14/2023]
Abstract
Because of the rapid shrinking trend of integrated circuits, the performances of nanodevices and nanomechanical systems are greatly affected by the joule heating and mechanical failure dilemma. In addition, structural defects are inevitable during experimental synthesis of nanomaterials, which may alter their physical properties significantly. Investigation of the thermal transport and mechanical behavior of nanostructured materials with structural defects is thus a crucial requirement. In this study, the thermal conductivity (TC) and tensile mechanical behavior of monolayer honeycomb BeO are systematically explored using molecular dynamics simulations. An infinite length bulk TC of ∼277.77 ± 8.93 W/mK was found for the pristine monolayer BeO. However, the insertion of 1% single vacancy (SV) and double vacancy (DV) defects reduces the TC by ∼36.98 and ∼33.52%, respectively. On the other hand, the uniaxial tensile loading produces asymmetrical fracture stress, elastic modulus, and fracture strain behaviors in the armchair and zigzag directions. The elastic modulus was reduced by ∼4.7 and ∼6.6% for 1% SV defects along the armchair and zigzag directions, respectively, whereas the reduction was ∼2.7 and ∼ 5.1% for 1% DV defects. Moreover, because of the strong symmetry-breaking effect, both the TC and mechanical strength were significantly lower for the SV defects than those for the DV defects. The highly softening and decreasing trends of the phonon modes with increasing vacancy concentration and temperature, respectively, were noticed for both types of defects, resulting in a reduction of the TC of the defected structures. These findings will be helpful for the understanding of the heat transport and mechanical characteristics of monolayer BeO as well as provide guidance for the design and control of BeO-based nanoelectronic and nanoelectromechanical devices.
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Affiliation(s)
- A. S.
M. Jannatul Islam
- Department
of Electrical and Electronic Engineering, Khulna University of Engineering &Technology, Khulna 9203, Bangladesh
| | - Md. Sherajul Islam
- Department
of Electrical and Electronic Engineering, Khulna University of Engineering &Technology, Khulna 9203, Bangladesh
- Department
of Electrical and Biomedical Engineering, University of Nevada, Reno, Nevada 89557, United States
| | - Nura Zannat Mim
- Department
of Electrical and Electronic Engineering, Khulna University of Engineering &Technology, Khulna 9203, Bangladesh
| | - Md. Shahadat Akbar
- Department
of Electrical and Electronic Engineering, Khulna University of Engineering &Technology, Khulna 9203, Bangladesh
| | - Md. Sayed Hasan
- Department
of Electrical and Electronic Engineering, Khulna University of Engineering &Technology, Khulna 9203, Bangladesh
| | - Md. Rasidul Islam
- Department
of Electrical and Electronic Engineering, Khulna University of Engineering &Technology, Khulna 9203, Bangladesh
| | - Catherine Stampfl
- School
of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Jeongwon Park
- Department
of Electrical and Biomedical Engineering, University of Nevada, Reno, Nevada 89557, United States
- School
of Electrical Engineering and Computer Science, University of Ottawa, Ottawa, ON K1N 6N5, Canada
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