Effect of gallium and arsenide adsorbed on graphene : a first-principles study on structural and electronic properties
In this study, the adsorption influence of two different metals, gallium (Ga) and arsenide (As) adatoms on the stabilities and electronic structure of single graphene layer has been systematically studied using first-principles pseudopotentials calculations within the framework of density functional...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
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American Scientific Publishers
2013
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| Online Access: | http://psasir.upm.edu.my/id/eprint/30312/ http://psasir.upm.edu.my/id/eprint/30312/1/Effect%20of%20gallium%20and%20arsenide%20adsorbed%20on%20graphene.pdf |
| _version_ | 1848846641716527104 |
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| author | Abubakar, Shamsu Rahman, Md. Mahmudur Abdullahi, Yusuf Zuntu Zainuddin, Hishamuddin Muhida, Rifki Setiyanto, Henry |
| author_facet | Abubakar, Shamsu Rahman, Md. Mahmudur Abdullahi, Yusuf Zuntu Zainuddin, Hishamuddin Muhida, Rifki Setiyanto, Henry |
| author_sort | Abubakar, Shamsu |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | In this study, the adsorption influence of two different metals, gallium (Ga) and arsenide (As) adatoms on the stabilities and electronic structure of single graphene layer has been systematically studied using first-principles pseudopotentials calculations within the framework of density functional theory (DFT). The generalized gradient approximation used is PW91 exchange-correlation functional. The results of our calculations reveal that the adsorption of Ga atom on graphene resulted in electron transfer mainly from p-orbital of the Ga adatom to graphene and subsequently, altered the electronic state of graphene by shifting the Fermi level away from Dirac point, up to ∼1.5 eV. Meanwhile, the d-orbitals of Ga adatom have spin polarization at the Fermi level where the minority spin d-orbitals are unoccupied. The As adatom was found to have larger adsorption energy value on H, B and T sites of graphene compared to Ga adatom. Thus, we described this energy difference as a result of the bonding configurations between both Ga and As atoms with carbon in the graphene structure. While B-site favored the adsorption of arsenic adatom, we found that the most favored adsorption site for Ga adatom on graphene is above H-sites. |
| first_indexed | 2025-11-15T09:05:57Z |
| format | Article |
| id | upm-30312 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T09:05:57Z |
| publishDate | 2013 |
| publisher | American Scientific Publishers |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-303122015-09-10T02:42:13Z http://psasir.upm.edu.my/id/eprint/30312/ Effect of gallium and arsenide adsorbed on graphene : a first-principles study on structural and electronic properties Abubakar, Shamsu Rahman, Md. Mahmudur Abdullahi, Yusuf Zuntu Zainuddin, Hishamuddin Muhida, Rifki Setiyanto, Henry In this study, the adsorption influence of two different metals, gallium (Ga) and arsenide (As) adatoms on the stabilities and electronic structure of single graphene layer has been systematically studied using first-principles pseudopotentials calculations within the framework of density functional theory (DFT). The generalized gradient approximation used is PW91 exchange-correlation functional. The results of our calculations reveal that the adsorption of Ga atom on graphene resulted in electron transfer mainly from p-orbital of the Ga adatom to graphene and subsequently, altered the electronic state of graphene by shifting the Fermi level away from Dirac point, up to ∼1.5 eV. Meanwhile, the d-orbitals of Ga adatom have spin polarization at the Fermi level where the minority spin d-orbitals are unoccupied. The As adatom was found to have larger adsorption energy value on H, B and T sites of graphene compared to Ga adatom. Thus, we described this energy difference as a result of the bonding configurations between both Ga and As atoms with carbon in the graphene structure. While B-site favored the adsorption of arsenic adatom, we found that the most favored adsorption site for Ga adatom on graphene is above H-sites. American Scientific Publishers 2013 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/30312/1/Effect%20of%20gallium%20and%20arsenide%20adsorbed%20on%20graphene.pdf Abubakar, Shamsu and Rahman, Md. Mahmudur and Abdullahi, Yusuf Zuntu and Zainuddin, Hishamuddin and Muhida, Rifki and Setiyanto, Henry (2013) Effect of gallium and arsenide adsorbed on graphene : a first-principles study on structural and electronic properties. Graphene, 1 (2). pp. 78-85. ISSN 2167-275X; ESSN: 2167-2768 http://www.aspbs.com/graphene.htm 10.1166/graph.2013.1016 English |
| spellingShingle | Abubakar, Shamsu Rahman, Md. Mahmudur Abdullahi, Yusuf Zuntu Zainuddin, Hishamuddin Muhida, Rifki Setiyanto, Henry Effect of gallium and arsenide adsorbed on graphene : a first-principles study on structural and electronic properties |
| title | Effect of gallium and arsenide adsorbed on graphene : a first-principles study on structural and electronic properties |
| title_full | Effect of gallium and arsenide adsorbed on graphene : a first-principles study on structural and electronic properties |
| title_fullStr | Effect of gallium and arsenide adsorbed on graphene : a first-principles study on structural and electronic properties |
| title_full_unstemmed | Effect of gallium and arsenide adsorbed on graphene : a first-principles study on structural and electronic properties |
| title_short | Effect of gallium and arsenide adsorbed on graphene : a first-principles study on structural and electronic properties |
| title_sort | effect of gallium and arsenide adsorbed on graphene : a first-principles study on structural and electronic properties |
| url | http://psasir.upm.edu.my/id/eprint/30312/ http://psasir.upm.edu.my/id/eprint/30312/ http://psasir.upm.edu.my/id/eprint/30312/ http://psasir.upm.edu.my/id/eprint/30312/1/Effect%20of%20gallium%20and%20arsenide%20adsorbed%20on%20graphene.pdf |