Structural characterization of pure and magnetic-doped Bi2Se3 nanoparticles

El-Fattah, Zakaria M. Abd; Ashoush, M. A.

doi:10.1007/s10854-017-8183-9

Cited by 5 publications

(3 citation statements)

References 38 publications

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“…Figure b exhibits the IR spectra of the nanoadditives. The three bands observable at ∼443, ∼510, and ∼680 cm –1 in the FTIR spectrum of Bi 2 Se 3 are characteristic of Bi–Se stretching vibrations . These bands are found at an identical position in the hybrid Bi 2 Se 3 /Bi 2 WO 6 and Bi 2 Se 3 /N-Bi 2 WO 6 .…”

Section: Resultsmentioning

confidence: 86%

“…The three bands observable at ∼443, ∼510, and ∼680 cm −1 in the FTIR spectrum of Bi 2 Se 3 are characteristic of Bi−Se stretching vibrations. 44 These bands are found at an identical position in the hybrid Bi 2 Se 3 /Bi 2 WO 6 and Bi 2 Se 3 /N-Bi 2 WO 6 . The spectrum of Bi 2 WO 6 exhibits prominent absorption bands in the range of 400−800 cm −1 , ascribed to stretching modes of Bi−O, W−O, and bridging W−O−W.…”

Section: Microstructure and Morphology Of The Synthesized Additivesmentioning

confidence: 87%

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Heterolamellar Bi₂Se₃/Bi₂WO₆ and Bi₂Se₃/N-Doped Bi₂WO₆ Nanosheet Composites as Potential Antifriction and Antiwear Agents

Shukla

Singh

Kavita

et al. 2023

ACS Appl. Eng. Mater.

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Hydrothermally synthesized bismuth selenide (Bi2Se3) nanosheets were reinforced by introducing lamellar bismuth tungstate (Bi2WO6) to obtain a heterolamellar structure anticipating higher tribological efficiency. For the furtherance of efficiency, the bismuth tungstate was nitrogen-doped (N-Bi2WO6) and was used to reinforce Bi2Se3 nanosheets. The propensity toward two-dimensional (2D) materials for the fabrication of composites was based on the presence of weak van der Waals forces between the adjacent layers, which eventually promotes lubricious behavior together with enhanced dispersibility. Examination of the hybrid nanosheets Bi2Se3/Bi2WO6 and Bi2Se3/N-Bi2WO6 by high-resolution scanning electron microscopy (HR-SEM), transmission electron microscopy (TEM), and high-resolution TEM (HR-TEM) demonstrated that Bi2WO6 and N-Bi2WO6 nanosheets were distributed uniformly onto Bi2Se3 nanosheets. The tribological attributes of well-identified nanoadditives Bi2Se3, Bi2WO6, N-Bi2WO6, Bi2Se3/Bi2WO6, and Bi2Se3/N-Bi2WO6 were evaluated in paraffin oil (PO) on a four-ball tester at an optimized concentration of 0.050% w/v operating ASTM D4172 and ASTM D5183 tests. The tribological data, mean wear scar diameter (MWD), friction coefficient (COF), and seizure load divulged that N-Bi2WO6 nanosheets behaved significantly better than Bi2WO6 nanosheets, which, in turn, surpassed the Bi2Se3 nanosheets. However, substantial upgradation of tribological activity was noted for the hybrid Bi2Se3/Bi2WO6 due to a heterolamellar structure with reduced interlaminar shear strength that effectively prevents restacking and agglomeration of nanosheets. For the advancement of tribological activity, the hybrid Bi2Se3/N-Bi2WO6 was prepared, which performed more efficiently than Bi2Se3/Bi2WO6. According to energy-dispersive X-ray (EDX) and X-ray photoelectron spectroscopy (XPS) analyses of the worn pathway, the generated tribo-film comprised metal oxides, Bi2O3, SeO2, WO3, and tungsten nitride, which synergetically improved the lubricity. The wear scar surface analysis by atomic force microscopy (AFM) and SEM validated the observed tribological results.

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Section: Resultsmentioning

confidence: 86%

Section: Microstructure and Morphology Of The Synthesized Additivesmentioning

confidence: 87%

Heterolamellar Bi₂Se₃/Bi₂WO₆ and Bi₂Se₃/N-Doped Bi₂WO₆ Nanosheet Composites as Potential Antifriction and Antiwear Agents

Shukla

Singh

Kavita

et al. 2023

ACS Appl. Eng. Mater.

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“…There already exist some published reports on magnetically (Mn, Ni, Fe, Cr, V and Co) doped TIs, which focus on describing the effects of magnetic impurities, or discussing typical ferromagnetism on Dirac like conducting surface states in various TIs viz. Bi 2 Se 3 , Bi 2 Te 3 and Sb 2 Te 3 [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44]. Till date, a very few reports have discussed on the magneto transport behaviour of Eu doped Bi 2 Se 3 thin films [45,46].…”

Section: Introductionmentioning

confidence: 99%

Structural, surface morphology and magneto-transport properties of self flux grown Eu doped Bi₂Se₃ single crystal

Sultana¹,

Gurjar²,

Gahtori³

et al. 2019

Mater. Res. Express

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Here, we report the effect of europium (Eu) doping in Bi 2 Se 3 topological insulator (TI) by using different characterization techniques viz. X-ray diffraction (XRD), scanning electron microscopy (SEM) coupled with energy dispersive X-ray analysis (EDXA) and magneto-transport measurements. Good quality Eu doped Bi 2 Se 3 (Eu 0.1 Bi 1.9 Se 3 ) single crystal is grown by the self flux method through the solid state reaction route. Single crystal XRD pattern displayed the high crystalline quality of the Eu 0.1 Bi 1.9 Se 3 sample along (00l) alignment whereas; the powder XRD confirmed the rhombohedral crystal structure without any impurity phases. SEM images exhibited a layered slab like structure stacked one over the other whereas; EDXA measurements confirmed the chemical composition of Eu 0.1 Bi 1.9 Se 3 sample. Further, the EDXA mapping showed the homogeneous distribution of Bi, Se and Eu elements. Temperature dependent electrical resistivity curves revealed a metallic behaviour both in the presence and absence of applied magnetic field. Magneto-transport measurements showed a decrease in the magneto-resistance (MR) value of the Eu 0.1 Bi 1.9 Se 3 sample (~32% at 5K) in comparison to the pure Bi 2 Se 3 sample (~80% at 5K). For, Eu 0.1 Bi 1.9 Se 3 sample, a complex crossover between WL and WAL phenomenon was observed at lower applied magnetic fields, whereas the same was absent in case of the pristine one. Further, HLN (Hikami Larkin Nagaoka) fitted magneto-conductivity (MC) analysis revealed a competing weak anti localization (WAL) and weak localization (WL) behaviour. Summarily, in the present work we study the structural, surface morphology and magneto-transport properties of as grown Eu 0.1 Bi 1.9 Se 3 single crystals.

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Synthesis of novel liquid phase exfoliation of chitosan/Bi2Se3 hybrid nanocomposites for in-vitro wound healing

Swaminathan,

Marimuthu,

Kasinathan

et al. 2024

International Journal of Biological Macromolecules

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Structural characterization of pure and magnetic-doped Bi2Se3 nanoparticles

Cited by 5 publications

References 38 publications

Heterolamellar Bi₂Se₃/Bi₂WO₆ and Bi₂Se₃/N-Doped Bi₂WO₆ Nanosheet Composites as Potential Antifriction and Antiwear Agents

Heterolamellar Bi₂Se₃/Bi₂WO₆ and Bi₂Se₃/N-Doped Bi₂WO₆ Nanosheet Composites as Potential Antifriction and Antiwear Agents

Structural, surface morphology and magneto-transport properties of self flux grown Eu doped Bi₂Se₃ single crystal

Synthesis of novel liquid phase exfoliation of chitosan/Bi2Se3 hybrid nanocomposites for in-vitro wound healing

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Structural characterization of pure and magnetic-doped Bi2Se3 nanoparticles

Cited by 5 publications

References 38 publications

Heterolamellar Bi2Se3/Bi2WO6 and Bi2Se3/N-Doped Bi2WO6 Nanosheet Composites as Potential Antifriction and Antiwear Agents

Heterolamellar Bi2Se3/Bi2WO6 and Bi2Se3/N-Doped Bi2WO6 Nanosheet Composites as Potential Antifriction and Antiwear Agents

Structural, surface morphology and magneto-transport properties of self flux grown Eu doped Bi2Se3 single crystal

Synthesis of novel liquid phase exfoliation of chitosan/Bi2Se3 hybrid nanocomposites for in-vitro wound healing

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Product

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Heterolamellar Bi₂Se₃/Bi₂WO₆ and Bi₂Se₃/N-Doped Bi₂WO₆ Nanosheet Composites as Potential Antifriction and Antiwear Agents

Heterolamellar Bi₂Se₃/Bi₂WO₆ and Bi₂Se₃/N-Doped Bi₂WO₆ Nanosheet Composites as Potential Antifriction and Antiwear Agents

Structural, surface morphology and magneto-transport properties of self flux grown Eu doped Bi₂Se₃ single crystal