Investigation of structural, optical and morphological properties of copper doped zinc sulphide nanoparticles

Balavijayalakshmi, J.; Manju, S.

doi:10.1016/j.mssp.2016.03.019

Cited by 8 publications

(3 citation statements)

References 28 publications

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“…36 Notably, the appearance of new absorption peaks at 617 cm −1 in CM10, CM50 CM90, and CuS can be ascribed to the stretching vibration of newly formed Cu−S bonds. 22 These infrared spectra of the CuS/MoS 2 composites provide further evidence of the successful composite formation between CuS and MoS 2 .…”

Section: Methodsmentioning

confidence: 69%

“…CuS is a significant p-type semiconductor that finds wide application in hydrogen storage, sensors, and lithium-ion batteries because of its metal-like electronic conductivity. − Nevertheless, the impedance mismatch of single CuS in MA weakens the MA performance. Accordingly, several performance improvement measures are required to maximize the MA performance of metal sulfur-based composites.…”

Section: Introductionmentioning

confidence: 99%

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Flower-Like CuS/MoS₂Nanoflake Composites as Heterojunctions for Microwave Absorption

Wang,

Zhao

et al. 2024

ACS Appl. Nano Mater.

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Molybdenum disulfide (MoS 2 ), a two-dimensional transition metal disulfide (TMD), is of great concern in microwave absorption (MA). Nevertheless, pure MoS 2 has limitations in realizing outstanding MA performance owing to its lower conductivity and smaller dielectric constant. To address this, compounding it with highly conductive CuS not only improves its conductivity and impedance-matching properties but also increases the interfacial polarization within the material and enhances the MA properties of the material. In this study, flower-like heterostructured CuS/MoS 2 nanoflake composites were prepared using the hydrothermal method. The characterization of the morphology and properties reveals the existence of a considerable number of heterogeneous interfaces in the composites, resulting in increased dielectric loss capability. By adjusting the ratio with CuS and MoS 2 , the CuS/MoS 2 -30 composite achieved an effective absorption bandwidth (EAB) of 6.4 GHz (from 11.6 to 18 GHz) and a minimum reflection loss (RL min ) of −57.89 dB. Meanwhile, the CuS/MoS 2 -50 composite with a matched thickness of 2.17 mm and an EAB of 6 GHz achieved the RL min value of −63.09 dB. These outstanding properties are based on the transition metal sulfide heterojunction formation of microwave absorbents; without coupling with magnetic materials, it shows excellent synergistic loss through dielectric−dielectric interaction. It is demonstrated that the flower-like heterojunction CuS/MoS 2 nanoflake composites are potentially ideal microwave absorption materials.

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Section: Methodsmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Flower-Like CuS/MoS₂Nanoflake Composites as Heterojunctions for Microwave Absorption

Wang,

Zhao

et al. 2024

ACS Appl. Nano Mater.

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“…It has a direct band gap of 3.6 eV at room temperature and has a mixture of cubic and hexagonal structure depending on preparation condition. ZnS has been investigated for its uses as visible light -emitting semiconductor laser [2,3]. It has been extensively studied for application as window layer for CdTe in CdTe/Cds and CdTe/GaAs heterojunction solar cells [4].…”

Section: Introductionmentioning

confidence: 99%

Behavior of A.C conductivity and Complex dielectric constant of ZnS Thin Films

Taha A,

S. Shaker,

S. Shaker

et al. 2015

ETJ

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The effect of temperature on dielectric properties of the prepared ZnS thin films by chemical bath deposition at film thickness (200) nm deposited at substrate temperature 333 K, was measured at frequency range (0.04-10 MHz) in the temperature range (298-473) K . The temperature -dependent of electrical conductivity, the real and imaginary parts of the complex dielectric constant are calculated at the selected frequencies. The frequency exponent n, and the activation energy, Ea, are determined. The a.c. conduction mechanism of ZnS films has been explained on the basis of hopping of charge carriers

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Dual-responsive molybdenum disulfide/copper sulfide-based delivery systems for enhanced chemo-photothermal therapy

Zhang

Williams³

et al. 2019

Journal of Colloid and Interface Science

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Molybdenum disulfide (MoS 2)-based drug delivery systems have shown considerable potential in cancer nanomedicines. In this work, a multifunctional nanoplatform comprising MoS 2 nanosheets decorated with copper sulfide (CuS) and further functionalized with polyethylene glycol (PEG) is reported. The resultant material has a particle size of approximately 115 nm, and can be loaded with doxorubicin (DOX) to a loading capacity of 162.3 mg DOX per g of carrier. Drug release is triggered by two stimuli (near infrared (NIR) irradiation and pH), and the carrier is shown to have excellent colloidal stability. The presence of both MoS 2 and CuS leads to very high photothermal conversion efficiency (higher than with MoS 2 alone). In vitro experiments revealed that the blank CuS-MoS 2-SH-PEG carrier is biocompatible, but that the synergistic application of chemo-photothermal therapy (in the form of CuS-MoS 2-SH-PEG loaded with DOX and NIR irradiation) led to greater cell death than either chemotherapy (CuS-MoS 2-SH-PEG(DOX) but no NIR) or photothermal therapy (CuS-MoS 2-SH-PEG with NIR). A cellular uptake study demonstrated that the nanoplatform can efficiently enter tumor cells, and that uptake is enhanced when NIR is applied. Overall, the functionalized MoS 2 material developed in this work exhibits great potential as an efficient system for dual responsive drug delivery and synergistic chemo-photothermal therapy. The route employed in our work thus provides a strategy to enhance photothermal efficacy for transition metal dichalcogenide drug delivery systems. 3 / 31

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Investigation of structural, optical and morphological properties of copper doped zinc sulphide nanoparticles

Cited by 8 publications

References 28 publications

Flower-Like CuS/MoS₂Nanoflake Composites as Heterojunctions for Microwave Absorption

Flower-Like CuS/MoS₂Nanoflake Composites as Heterojunctions for Microwave Absorption

Behavior of A.C conductivity and Complex dielectric constant of ZnS Thin Films

Dual-responsive molybdenum disulfide/copper sulfide-based delivery systems for enhanced chemo-photothermal therapy

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Investigation of structural, optical and morphological properties of copper doped zinc sulphide nanoparticles

Cited by 8 publications

References 28 publications

Flower-Like CuS/MoS2Nanoflake Composites as Heterojunctions for Microwave Absorption

Flower-Like CuS/MoS2Nanoflake Composites as Heterojunctions for Microwave Absorption

Behavior of A.C conductivity and Complex dielectric constant of ZnS Thin Films

Dual-responsive molybdenum disulfide/copper sulfide-based delivery systems for enhanced chemo-photothermal therapy

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Product

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Flower-Like CuS/MoS₂Nanoflake Composites as Heterojunctions for Microwave Absorption

Flower-Like CuS/MoS₂Nanoflake Composites as Heterojunctions for Microwave Absorption