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Abstract <p>The iron-based chalcopyrite (I-III-VI<sub>2</sub>) of CuFeX<sub>2</sub> nanocrystals (NCs) and their surface passivated CuFeX<sub>2</sub>/ZnS core/shell NCs were prepared by hot injection method. The existence of broad absorption peaks in the Ultraviolet-visible (UV-Vis) spectroscopy analysis as well as the higher peak intensity in PL study compared to unpassivated CuFeX<sub>2</sub> NCs confirms the ZnS passivation over CuFeX<sub>2</sub>. The UV-Vis and Cyclic voltammetry (CV) measurements confirm the band gap in the range of 1.78 eV (CuFeS<sub>2</sub>) and 1.35 eV (CuFeSe<sub>2</sub>) for surface passivated CuFeX<sub>2</sub> (X = S, Se), which are much higher than those of &#xa0;the bulk materials of their counterpart. X-ray diffraction (XRD) analysis reveals that both CuFeX<sub>2</sub> and CuFeX<sub>2</sub>/ZnS have similar tetragonal structure. Scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analysis also confirm the ZnS passivation over CuFeX<sub>2</sub> (X = S, Se) NCs, by the appearance of a quasi-cubes with significant proportion of irregular shapes. Their EDX measurement agrees with the elemental composition present in the existing systems. The bioimaging study of CuFeX<sub>2</sub>/ZnS NCs were analyzed by recording their cytotoxicity study for micelle encapsulated CuFeX<sub>2</sub>/ZnS core/shell NCs with various concentrations on human lung cancer cells (A549) using the MTT assay, and it reveals that cell viability increases with the increased core/shell NCs concentrations. Their antibacterial study was also revealed the same trend.</p>

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Iron-based Chalcopyrite CuFeX2 Nanocrystals and Surface Passivated CuFeX2/ZnS (X = S and Se) Core/shell Architecture: Synthesis, Structural, Morphological, Optical and Biological Activities

  • 期刊论文

  • 发表日期：

    2025年3月23日

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  • V. Renuga,
  • A. Dinesh,
  • P. Anandaraj,
  • Manikandan Ayyar,
  • Kailasam Saravana Mani,
  • E. Priyadharshini,
  • Lalitha Gnanasekaran,
  • V. Mohanavel,
  • M. Santhamoorthy,
  • S. Sreenivasa,
  • A. Rajendran,
  • S. Santhoshkumar

摘要

Abstract

The iron-based chalcopyrite (I-III-VI2) of CuFeX2 nanocrystals (NCs) and their surface passivated CuFeX2/ZnS core/shell NCs were prepared by hot injection method. The existence of broad absorption peaks in the Ultraviolet-visible (UV-Vis) spectroscopy analysis as well as the higher peak intensity in PL study compared to unpassivated CuFeX2 NCs confirms the ZnS passivation over CuFeX2. The UV-Vis and Cyclic voltammetry (CV) measurements confirm the band gap in the range of 1.78 eV (CuFeS2) and 1.35 eV (CuFeSe2) for surface passivated CuFeX2 (X = S, Se), which are much higher than those of  the bulk materials of their counterpart. X-ray diffraction (XRD) analysis reveals that both CuFeX2 and CuFeX2/ZnS have similar tetragonal structure. Scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analysis also confirm the ZnS passivation over CuFeX2 (X = S, Se) NCs, by the appearance of a quasi-cubes with significant proportion of irregular shapes. Their EDX measurement agrees with the elemental composition present in the existing systems. The bioimaging study of CuFeX2/ZnS NCs were analyzed by recording their cytotoxicity study for micelle encapsulated CuFeX2/ZnS core/shell NCs with various concentrations on human lung cancer cells (A549) using the MTT assay, and it reveals that cell viability increases with the increased core/shell NCs concentrations. Their antibacterial study was also revealed the same trend.