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Sakr MAS, Abdelsalam H, Teleb NH, Abd-Elkader OH, Zhang Q. Exploring the structural, electronic, and hydrogen storage properties of hexagonal boron nitride and carbon nanotubes: insights from single-walled to doped double-walled configurations. Sci Rep 2024; 14:4970. [PMID: 38424295 PMCID: PMC10904835 DOI: 10.1038/s41598-024-55583-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 02/26/2024] [Indexed: 03/02/2024] Open
Abstract
This study investigates the structural intricacies and properties of single-walled nanotubes (SWNT) and double-walled nanotubes (DWNT) composed of hexagonal boron nitride (BN) and carbon (C). Doping with various atoms including light elements (B, N, O) and heavy metals (Fe, Co, Cu) is taken into account. The optimized configurations of SWNT and DWNT, along with dopant positions, are explored, with a focus on DWNT-BN-C. The stability analysis, employing binding energies, affirms the favorable formation of nanotube structures, with DWNT-C emerging as the most stable compound. Quantum stability assessments reveal significant intramolecular charge transfer in specific configurations. Electronic properties, including charge distribution, electronegativity, and electrical conductivity, are examined, showcasing the impact of doping. Energy gap values highlight the diverse electronic characteristics of the nanotubes. PDOS analysis provides insights into the contribution of atoms to molecular orbitals. UV-Vis absorption spectra unravel the optical transitions, showcasing the influence of nanotube size, dopant type, and location. Hydrogen storage capabilities are explored, with suitable adsorption energies indicating favorable hydrogen adsorption. The desorption temperatures for hydrogen release vary across configurations, with notable enhancements in specific doped DWNT-C variants, suggesting potential applications in high-temperature hydrogen release. Overall, this comprehensive investigation provides valuable insights into the structural, electronic, optical, and hydrogen storage properties of BN and C nanotubes, laying the foundation for tailored applications in electronics and energy storage.
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Affiliation(s)
- Mahmoud A S Sakr
- Center of Basic Science (CBS), Misr University for Science and Technology (MUST), 6th October City, Egypt.
| | - Hazem Abdelsalam
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China.
- Theoretical Physics Department, National Research Centre, El-Buhouth Str., Dokki, Giza, 12622, Egypt.
| | - Nahed H Teleb
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China
- Electron Microscope and Thin Films Department, National Research Centre, El-Buhouth Str., Dokki, Giza, 12622, Egypt
| | - Omar H Abd-Elkader
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, 11451, Riyadh, Saudi Arabia
| | - Qinfang Zhang
- Center of Basic Science (CBS), Misr University for Science and Technology (MUST), 6th October City, Egypt.
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Sakr MAS, Saad MA, Abdelsalam H, Teleb NH, Zhang Q. Electronic and optical properties of chemically modified 2D GaAs nanoribbons. Sci Rep 2023; 13:15535. [PMID: 37726390 PMCID: PMC10509254 DOI: 10.1038/s41598-023-42855-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 09/15/2023] [Indexed: 09/21/2023] Open
Abstract
We employed density functional theory calculations to investigate the electronic and optical characteristics of finite GaAs nanoribbons (NRs). Our study encompasses chemical alterations including doping, functionalization, and complete passivation, aimed at tailoring NR properties. The structural stability of these NRs was affirmed by detecting real vibrational frequencies in infrared spectra, indicating dynamical stability. Positive binding energies further corroborated the robust formation of NRs. Analysis of doped GaAs nanoribbons revealed a diverse range of energy gaps (approximately 2.672 to 5.132 eV). The introduction of F atoms through passivation extended the gap to 5.132 eV, while Cu atoms introduced via edge doping reduced it to 2.672 eV. A density of states analysis indicated that As atom orbitals primarily contributed to occupied molecular orbitals, while Ga atom orbitals significantly influenced unoccupied states. This suggested As atoms as electron donors and Ga atoms as electron acceptors in potential interactions. We investigated excited-state electron-hole interactions through various indices, including electron-hole overlap and charge-transfer length. These insights enriched our understanding of these interactions. Notably, UV-Vis absorption spectra exhibited intriguing phenomena. Doping with Te, Cu, W, and Mo induced redshifts, while functionalization induced red/blue shifts in GaAs-34NR spectra. Passivation, functionalization, and doping collectively enhanced electrical conductivity, highlighting the potential for improving material properties. Among the compounds studied, GaAs-34NR-edg-Cu demonstrated the highest electrical conductivity, while GaAs-34NR displayed the lowest. In summary, our comprehensive investigation offers valuable insights into customizing GaAs nanoribbon characteristics, with promising implications for nanoelectronics and optoelectronics applications.
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Affiliation(s)
- Mahmoud A S Sakr
- Chemistry Department, Center of Basic Science (CBS), Misr University of Science and Technology (MUST), 6th October City, Egypt.
| | - Mohamed A Saad
- Physics Department, Center of Basic Science (CBS), Misr University of Science and Technology (MUST), 6th October City, Egypt
| | - Hazem Abdelsalam
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China.
- Theoretical Physics Department, National Research Centre, El-Buhouth Str., Dokki, Giza, 12622, Egypt.
| | - Nahed H Teleb
- Electron Microscope and Thin Films Department, National Research Centre, El-Buhouth Str., Dokki, Giza, 12622, Egypt
| | - Qinfang Zhang
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng, 224051, People's Republic of China.
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Gawad SAA, Sakr MA. Spectroscopic investigation, DFT and TD-DFT calculations of 7-(Diethylamino) Coumarin (C466). J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131413] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Sakr MEM, Kana MTHA, Elwahy AHM, Abdelwahed MS, El-Daly SA, Ebeid EZM. Spectroscopic Behavior and Photophysical Parameters of 2-(Acetoxymethyl)-6-(1,2,4-triazinylaminodihydroquinazolinyl)tetrahydropyran Derivative in Different Solid Hosts. J Fluoresc 2022; 32:1509-1516. [PMID: 35522344 PMCID: PMC9270284 DOI: 10.1007/s10895-022-02960-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 04/20/2022] [Indexed: 11/24/2022]
Abstract
Optical and photophysical properties of 6-substituted-1,2,4-Triazine fluorescent derivative dye doped in silicate based sol-gel, homopolymer of methyl methacrylate (PMMA), and copolymer (MMA/diethylene glycol dimethacrylate) (DEGDMA) were investigated. The pores of different hosts and caging of the dye were found to effect on the parameters such as molar absorptivity, cross sections of singlet-singlet electronic absorption and emission spectra, excited state lifetime, quantum yield of fluorescence. The dipole moment of electronic transition, the length of attenuation and oscillator strength of electronic transition from So → S1 have been calculated. The dye was pumped with different powers using 3rd harmonic Nd: YAG laser of 355 nm and pulse duration 8 ns, with repetition rate 10 Hz. Good photo stability for dye was attained. After 55,000 pumping pulses of (10 mJ/pulse), the photo-stabilities were decreased to 53%, 48%, and 45% of the initial ASE of dye in sol gel, PMMA, and Co-polymer respectively. The dye in sol-gel matrix showed improvement of photo stability compared with those in organic polymeric matrices.
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Affiliation(s)
- Mahmoud E. M. Sakr
- Laser Sciences and Interactions Department, National Institute of Laser-Enhanced Sciences (NILES), Cairo University, Giza, Egypt
| | - Maram T. H. Abou Kana
- Laser Sciences and Interactions Department, National Institute of Laser-Enhanced Sciences (NILES), Cairo University, Giza, Egypt
| | | | | | - Samy A. El-Daly
- Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt
| | - El-Zeiny M. Ebeid
- Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt ,Misr University for Science and Technology (MUST), 6th of October City, Egypt
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Yang Z, Tian Y, Cang S, Zhang L, Liu L. The synthesis of a series of fluorescent emitters and their application for dye lasing and cation sensing. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 246:118978. [PMID: 33038857 DOI: 10.1016/j.saa.2020.118978] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 09/16/2020] [Accepted: 09/17/2020] [Indexed: 05/13/2023]
Abstract
The following paper reported four carbazole-modified fluorescent emitters. Their molecular structure and electronic transition were analyzed via their single crystal and theoretical calculation. Their photophysical parameters, including absorption, emission and quantum yield, were determined and discussed. It was found that the emission performance of benzo-thiazole-based dyes was better than that of benzo-imidazole-based dyes, owing to the electron-donating effect from the S atom. Upon the presence of metal cations, these photophysical parameters were re-measured. Benzo-thiazole-based dyes were found insensitive towards most metal cations, while benzo-imidazole-based dyes showed obvious photophysical variation upon these metal cations, including absorption red shift and emission quenching. Detailed sensing performance of a representative dye was discussed. A linear working curve with good selectivity was finally observed. Its sensing mechanism was confirmed as the coordination between metal cation and deprotonated benzo-imidazole group. Benzo-thiazole-based dyes showed amplified spontaneous emission (ASE) behavior, with threshold energy of ~220 μJ. Given the optimal condition, a highest ASE efficiency of ~2% was observed, with FWHM value of 6 nm and emission peak of 435 nm. The major novelty and advancement of these fluorescent dyes shall be the stable ASE output (dye 4) under UV excitation and the linear sensing curve with good selectivity (dye 3), which was a hard task for emission turn off sensing probes. We attributed its causation to the valent-recognizing sensing mechanism.
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Affiliation(s)
- Zixuan Yang
- Key Laboratory of Impact and Safety Engineering, Ministry of Education, Ningbo University, Ningbo 315211, China.
| | - Yaqiang Tian
- Key Laboratory of the Ministry of Education for Modern Metallurgy Technology, North China University of Science and Technology, Tangshan 063210, China
| | - Sheng Cang
- Key Laboratory of Impact and Safety Engineering, Ministry of Education, Ningbo University, Ningbo 315211, China
| | - Leiyu Zhang
- Key Laboratory of the Ministry of Education for Modern Metallurgy Technology, North China University of Science and Technology, Tangshan 063210, China
| | - Liang Liu
- Green Intelligence Environmental School, Yangtze Normal University, Fuling, Chongqing 408100, China
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