Preparation of nanosheets embedded ZnSe/Bi2Se3 core/shell quantum dots for the study of optical properties and antibacterial activity

Priyadarshini, Priyanka; Das, S.; Senapati, Subrata; Samal, Smrutipragnya; Pradhan, Gopal K.; Naik, Ramakanta

doi:10.1016/j.surfin.2023.102687

Cited by 8 publications

(8 citation statements)

References 61 publications

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“…The absence of Bi peaks in the primary sample CBIS-0 and the presence of the same in the CBIS-4 sample confirm the Bi content variation. 44 Doping led to significant defect redistribution. Thus, it can be observed that with Bi addition, the peak intensity is reduced, possibly due to the creation of defects and disorder inside the system.…”

Section: Resultsmentioning

confidence: 99%

Morphological evolution of individual microrods to self-assembled 3D hierarchical flower architectures of CuBi_xIn_1−xSe₂ for photo response applications

Priyadarshini,

Senapati,

Mohapatra

et al. 2024

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 99%

Morphological evolution of individual microrods to self-assembled 3D hierarchical flower architectures of CuBi_xIn_1−xSe₂ for photo response applications

Priyadarshini,

Senapati,

Mohapatra

et al. 2024

J. Mater. Chem. C

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“…Another three models are specified by Ravindra, Herve–Vandamme, and Tripathy and are specified as follows − n R = 4.084 − [ 0.62 × E normalg ] n 2 = 1 + ( A E normalg + B ) 2 and n T = 1.73 × [ 1 + 1.9017 × normale − 0.539 × E normalg ] …”

Section: Resultsmentioning

confidence: 99%

Hydrothermally Synthesized Bi-Doped CdTe Nanoparticles with Tunable Optical and Photoresponse Properties for Visible Photodetectors

Supriya,

Kumar,

Pradhan

et al. 2024

ACS Appl. Mater. Interfaces

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The remarkable applicability and unique properties of CdTe nanoparticles make them vital in various applications such as optoelectronics and photovoltaics. It has been demonstrated that adding a metal dopant to a nanomaterial matrix significantly improves its characteristics, increasing its potential for a variety of applications. In this work, a simple hydrothermal synthesis process for bidoped CdTe nanoparticles is reported, wherein four distinct samples are generated by adjusting the concentration of Bi doping. Structural analysis using X-ray diffraction (XRD) confirmed the presence of the CdTe cubic phase in the material with observable phase shifts due to Bi incorporation. Rietveld refinement of the XRD results further enabled a detailed structural analysis. Raman spectroscopy provided insights into the different vibrational modes of CdTe, while transmission electron microscopy analysis further elucidated the CdTe phase and determined interplanar spacing values. Morphological examination via field emission scanning electron microscopy revealed a consistent nanoparticle-like morphology, unaffected even by increased Bi concentration. Elemental analysis conducted through inductively coupled plasma mass spectrometry offered valuable insights into the composition of the material. Furthermore, UV−vis analysis revealed a decrease in the bandgap, indicating potential shifts in the material's optical properties. Notably, the photoresponse study demonstrated an increase in current value, as well as alterations in the rise and decay times of the material. These properties highlight its potential for various optical and electrical applications. Overall, these findings underscore the promising prospects of bidoped CdTe nanoparticles in various advancements.

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“…The PL spectra of the different samples of CuZnSe are shown in Figure 10(c) in the range of 500 to 900 nm wavelength. The intense peaks are present because of the emission from defect levels of the composition [68,69] . The intensity of the PL peaks depends on the variation of the Cu and Zn concentrations.…”

Section: Resultsmentioning

confidence: 99%

“…The intense peaks are present because of the emission from defect levels of the composition. [68,69] The intensity of the PL peaks depends on the variation of the Cu and Zn concentrations. From the figure, it was found that sample CuZnSe-2 has the lowest PL intensity, and sample CuZnSe-3 has the highest intensity.…”

Section: Absorbance Optical Bandgap Refractive Index Dielectric Const...mentioning

confidence: 99%

Hydrothermal Synthesis of Cu_0.66‐xZn_0.34+xSe Materials and Investigation of Their Structural, Optical, and Magnetic Properties

Parida,

Senapati,

Pradhan

et al. 2023

ChemistrySelect

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In the current paper, we have prepared Cu0.66‐xZn0.34+xSe materials by varying the concentration of copper and zinc (x=0, 0.085, 0.17, 0.255, 0.34) with the help of a facile one‐step hydrothermal method. The X‐ray diffraction study reveals that the as‐prepared nanomaterials show the polycrystalline property. The crystallinity increases with the variation of Zn concentration, and the average crystallite size was calculated in the 39 to 55 nm range. The morphological analysis shows the uniform and agglomerated particles having an average size of around 596 nm. High‐resolution transmission electron microscopy and selected area electron diffraction study reveal the crystalline phases of the prepared sample. The energy‐dispersive X‐ray analysis confirmed the presence of constituent elements in the sample. The sample shows a high optical bandgap in the range of 3.6 eV to 4.09 eV, which was calculated from absorbance spectra. Photoluminescence measurements of the samples were carried out with 532 nm laser excitation, where the defect‐related emission peaks in the 540–850 nm range are observed. A change in the bandgap and optical emission is observed for different compositions. The magnetic properties analysis through the vibrating sample magnetometer reveals that the prepared sample exhibits ferromagnetic behaviour at room temperature, which can be used in magnetic storage applications. The tuning of the optical properties of the samples by varying the copper and zinc concentrations will be useful for various photonic devices.

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Preparation of nanosheets embedded ZnSe/Bi2Se3 core/shell quantum dots for the study of optical properties and antibacterial activity

Cited by 8 publications

References 61 publications

Morphological evolution of individual microrods to self-assembled 3D hierarchical flower architectures of CuBi_xIn_1−xSe₂ for photo response applications

Morphological evolution of individual microrods to self-assembled 3D hierarchical flower architectures of CuBi_xIn_1−xSe₂ for photo response applications

Hydrothermally Synthesized Bi-Doped CdTe Nanoparticles with Tunable Optical and Photoresponse Properties for Visible Photodetectors

Hydrothermal Synthesis of Cu_0.66‐xZn_0.34+xSe Materials and Investigation of Their Structural, Optical, and Magnetic Properties

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Preparation of nanosheets embedded ZnSe/Bi2Se3 core/shell quantum dots for the study of optical properties and antibacterial activity

Cited by 8 publications

References 61 publications

Morphological evolution of individual microrods to self-assembled 3D hierarchical flower architectures of CuBixIn1−xSe2 for photo response applications

Morphological evolution of individual microrods to self-assembled 3D hierarchical flower architectures of CuBixIn1−xSe2 for photo response applications

Hydrothermally Synthesized Bi-Doped CdTe Nanoparticles with Tunable Optical and Photoresponse Properties for Visible Photodetectors

Hydrothermal Synthesis of Cu0.66‐xZn0.34+xSe Materials and Investigation of Their Structural, Optical, and Magnetic Properties

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Product

Resources

About

Morphological evolution of individual microrods to self-assembled 3D hierarchical flower architectures of CuBi_xIn_1−xSe₂ for photo response applications

Morphological evolution of individual microrods to self-assembled 3D hierarchical flower architectures of CuBi_xIn_1−xSe₂ for photo response applications

Hydrothermal Synthesis of Cu_0.66‐xZn_0.34+xSe Materials and Investigation of Their Structural, Optical, and Magnetic Properties