Electrical and mechanical properties variation of Al2O3–CaO-CNT(3,3) nanomaterial due to Al vacancy and temperature: DFT approach
Al2O3–CaO-CNT(3,3) nanomaterial has demonstrated excellent electrical and mechanical properties in the absence of defects suitable for applications in microelectronics, batteries, and fuel cells. It is impossible to develop materials without the presence of defects. Therefore, this research work was...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-06-01
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| Series: | Results in Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590048X24000451 |
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| author | Peace Pamilerin Adara Sunday Temitope Oyinbo Tien-Chien Jen |
| author_facet | Peace Pamilerin Adara Sunday Temitope Oyinbo Tien-Chien Jen |
| author_sort | Peace Pamilerin Adara |
| collection | DOAJ |
| description | Al2O3–CaO-CNT(3,3) nanomaterial has demonstrated excellent electrical and mechanical properties in the absence of defects suitable for applications in microelectronics, batteries, and fuel cells. It is impossible to develop materials without the presence of defects. Therefore, this research work was instituted to investigate the electrical and mechanical properties of this nanomaterial in the presence of VAl defect (a defect with lower formation energy in Al2O3) through DFT. The calculations were based on the Perdew, Burke, and Ernzerh (PBE) exchange-correlation functional, which uses the generalized-gradient approximation of an all-electron technique. The nanomaterial's spin-up and spin-down energy gaps (EG) increased due to the defect, from 0.007 eV to 0.000 eV–0.560 eV and 0.129 eV respectively. However, these values are still lower than that of Al2O3, which is widely used as an insulator. The lowest and highest EG recorded was at 0 °C and 60 °C for spin down, and at 0 °C and 80 °C for spin up respectively. The presence of the defect in the nanomaterial also led to the degradation of some of the mechanical properties majorly along (0-10), where the maximum bulk modulus decreases from 48.73 GPa to 8.40 GPa, the compressibility also increases from 56.82 GPa to 90.68 GPa. |
| first_indexed | 2024-04-24T08:11:12Z |
| format | Article |
| id | doaj.art-0af1b183f9c846a0b5c43577e376dadf |
| institution | Directory Open Access Journal |
| issn | 2590-048X |
| language | English |
| last_indexed | 2024-04-24T08:11:12Z |
| publishDate | 2024-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Materials |
| spelling | doaj.art-0af1b183f9c846a0b5c43577e376dadf2024-04-17T04:49:47ZengElsevierResults in Materials2590-048X2024-06-0122100571Electrical and mechanical properties variation of Al2O3–CaO-CNT(3,3) nanomaterial due to Al vacancy and temperature: DFT approachPeace Pamilerin Adara0Sunday Temitope Oyinbo1Tien-Chien Jen2Department of Mechanical Engineering Science, University of Johannesburg, Gauteng, 2006, South AfricaDepartment of Mechanical Engineering Science, University of Johannesburg, Gauteng, 2006, South AfricaCorresponding author.; Department of Mechanical Engineering Science, University of Johannesburg, Gauteng, 2006, South AfricaAl2O3–CaO-CNT(3,3) nanomaterial has demonstrated excellent electrical and mechanical properties in the absence of defects suitable for applications in microelectronics, batteries, and fuel cells. It is impossible to develop materials without the presence of defects. Therefore, this research work was instituted to investigate the electrical and mechanical properties of this nanomaterial in the presence of VAl defect (a defect with lower formation energy in Al2O3) through DFT. The calculations were based on the Perdew, Burke, and Ernzerh (PBE) exchange-correlation functional, which uses the generalized-gradient approximation of an all-electron technique. The nanomaterial's spin-up and spin-down energy gaps (EG) increased due to the defect, from 0.007 eV to 0.000 eV–0.560 eV and 0.129 eV respectively. However, these values are still lower than that of Al2O3, which is widely used as an insulator. The lowest and highest EG recorded was at 0 °C and 60 °C for spin down, and at 0 °C and 80 °C for spin up respectively. The presence of the defect in the nanomaterial also led to the degradation of some of the mechanical properties majorly along (0-10), where the maximum bulk modulus decreases from 48.73 GPa to 8.40 GPa, the compressibility also increases from 56.82 GPa to 90.68 GPa.http://www.sciencedirect.com/science/article/pii/S2590048X24000451Vacancy defectDensity functional theoryMechanical propertiesElectrical propertiesNanomaterial |
| spellingShingle | Peace Pamilerin Adara Sunday Temitope Oyinbo Tien-Chien Jen Electrical and mechanical properties variation of Al2O3–CaO-CNT(3,3) nanomaterial due to Al vacancy and temperature: DFT approach Results in Materials Vacancy defect Density functional theory Mechanical properties Electrical properties Nanomaterial |
| title | Electrical and mechanical properties variation of Al2O3–CaO-CNT(3,3) nanomaterial due to Al vacancy and temperature: DFT approach |
| title_full | Electrical and mechanical properties variation of Al2O3–CaO-CNT(3,3) nanomaterial due to Al vacancy and temperature: DFT approach |
| title_fullStr | Electrical and mechanical properties variation of Al2O3–CaO-CNT(3,3) nanomaterial due to Al vacancy and temperature: DFT approach |
| title_full_unstemmed | Electrical and mechanical properties variation of Al2O3–CaO-CNT(3,3) nanomaterial due to Al vacancy and temperature: DFT approach |
| title_short | Electrical and mechanical properties variation of Al2O3–CaO-CNT(3,3) nanomaterial due to Al vacancy and temperature: DFT approach |
| title_sort | electrical and mechanical properties variation of al2o3 cao cnt 3 3 nanomaterial due to al vacancy and temperature dft approach |
| topic | Vacancy defect Density functional theory Mechanical properties Electrical properties Nanomaterial |
| url | http://www.sciencedirect.com/science/article/pii/S2590048X24000451 |
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