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Designing photothermal transducing agents (PTAs) with enhanced photothermal conversion efficiency (PCE) holds essential importance for photothermal tumor eradication applications. Currently, it is an effective way to improve the photothermal efficiency by designing the energy level transition leading to the enhancement of UV absorption. To address the challenge, we develop novel Prussian blue@polyacrylic acid/copper sulfide Janus nanoparticles (PB@PAA/CuS JNPs) via selective coating of PAA nano-hemisphere on one of the surfaces of PB NPs followed by the further formation of CuS on the PAA template. The experiments show that the energy level transition occurs between Janus structure. Besides, it offers enhanced absorption over NIR-I and NIR-II dual windows. The muscle tissue penetration studies suggest that the PB@PAA/CuS JNPs have deeper tissue penetration in the 1064 nm laser irradiation group, indicating their potential for treating deep-tissue-seated tumors. In a word, the unique PB@PAA/CuS JNPs show an enhanced tumor inhibitory effect over the NIR-I and NIR-II dual windows, which will open up new opportunities for improving PTT efficiency by the rational nanostructural design of PTAs., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier Inc. All rights reserved.)

Facile growth of CuS nanowires through self-assembly and their application as building blocks for near-infrared light-responsive functional films have been demonstrated. It is found that DNA is a key factor in preparing the CuS material with defined nanostructure. An exclusive oriented self-aggregate growth mechanism is proposed for the growth of the nanowires, which might have important implications for preparing advanced, sophisticated nanostructures based on DNA nanotechnology. By employing the hydrophilic CuS nanowire as an optical absorber and thermosensitive nanogel as guest reservoir inside alginate film, a new platform for the release of functional molecules has been set up. In vitro studies have shown that the hybrid film possesses excellent biocompatibility and the release rate of chemical molecules from the film could be controlled with high spatial and temporal precision. Our novel approach and the resulting outstanding combination of properties may advance both the fields of DNA nanotechnology and light-responsive devices., (© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Actively targeted theranostic nanomedicine may be the key for future personalized cancer management. Although numerous types of theranostic nanoparticles have been developed in the past decade for cancer treatment, challenges still exist in the engineering of biocompatible theranostic nanoparticles with highly specific in vivo tumor targeting capabilities. Here, we report the design, synthesis, surface engineering, and in vivo active vasculature targeting of a new category of theranostic nanoparticle for future cancer management. Water-soluble photothermally sensitive copper sulfide nanoparticles were encapsulated in biocompatible mesoporous silica shells, followed by multistep surface engineering to form the final theranostic nanoparticles. Systematic in vitro targeting, an in vivo long-term toxicity study, photothermal ablation evaluation, in vivo vasculature targeted imaging, biodistribution and histology studies were performed to fully explore the potential of as-developed new theranostic nanoparticles.

Photocatalysts have gained much attention because of the water pollution instigated by the rapid usage of organic dyes for industrial needs. The degradation of these dyes using photocatalysts under natural light is an economical and popular method for water treatment. There is a need to synthesize photocatalytic materials which can generate reactive oxygen species under natural light. Hence, keeping in mind the above point, rose flower-shaped CuS nanostructures have been synthesized first time by solvothermal technique by varying reaction duration. The self-assembled powder of CuS nanostructures is characterized using XRD, FE-SEM, TEM, DLS, EDS, XPS, Raman, FT-IR, and UV–visible spectroscopy. The XRD and TEM analyses confirmed the formation of a polycrystalline hexagonal structure with prominent diffraction peaks. FE-SEM study shows the formation of uniformly self-assembled rose flower-shaped nanostructures of size 2–3 μm composed of densely packed nanoparticles. XPS study shows the presence of Cu(II) and Cu(I) states of copper in the synthesized batch and stoichiometric composition Cu:S is found to be 60:40 at.%. The optical studies showed broad absorption spectra of CuS nanostructures in about 300–800 nm wavelength range. Besides, this work studies the degradation activity of methylene blue and crystal violet organic dyes under natural sunlight conditions without the presence of any additive agent. [ABSTRACT FROM AUTHOR]

Nanoparticles of copper sulfide have been prepared by simple reaction between using copper nitrate with different concentrations ratio 0.1, 0.3, and 0.5 mM, thiourea by a simple chemical route. The prepared Nano powders have been deposited onto glass substrates by casting method at 60°C. The structure of the product Nano- films has been studied by x-ray diffraction, where the patterns showed that all the samples have a hexagonal structure of covellite copper sulfide with the average crystalline sizes 14.07- 16.51 nm. The morphology has been examined by atomic force microscopy, and field emission scan electron microscopy. The AFM images showed particles with almost spherical and rod shapes with average diameter sizes of 49.11- 90.64 nm. From the UV-Vis absorption studies, it has been noted that the increased absorption edge for all thin films leads to decreases in the energy gap of 3.5 to 3.0 eV for 1mM and 5mM respectively.

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In this work, hierarchical ZnFe 2 O 4 @RGO@CuS composite was synthesized by a simple two-step hydrothermal route, and its constitution, microstructures and microwave absorption properties were investigated by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and vector network analyzer (VNA). Experimental results show that hierarchical ZnFe 2 O 4 @RGO@CuS composite exhibits an enhanced electromagnetic wave attenuation capacity, which is ascribed to the suitable impedance match, magnetic loss, dielectric loss and special hierarchical nanostructure. Importantly, the three-dimensional flower-like structure of CuS can produce more multiple reflection and scattering, leading to more consumption of electromagnetic wave energy. The maximum reflection loss of ZnFe 2 O 4 @RGO @CuS composite reaches −55.4 dB at 14.6 GHz and the effective absorption bandwidth (<−10 dB) is as wide as 7.5 GHz (from 10.5 to 18 GHz) for a thickness of only 2.2 mm. Hence, the as-prepared nanocomposite with strong absorption and wide frequency can be a promising absorber in decreasing EM wave interference. [ABSTRACT FROM AUTHOR]

Abstract: Graphene‐like two‐dimensional (2D) nanomaterials have many unique properties in diverse fields, but the synthesis method of graphene‐like CuS 2D nanomaterials is rarely studied. In this work, we reported that the CuS flower‐like superstructure microspheres with a solid core (CuS‐FSMs) were prepared by a facile hydrolysis method without a template or surfactant. The novel CuS‐FSM material showed a well‐define solid core of approximately 300–500 nm and a loose shell of 0.5–1 μm. More importantly, the loose shell of the CuS‐FSMs was constructed of graphene‐like CuS nanosheets (CuS‐GN). The formation mechanism indicated that the CuS‐FSMs were firstly formed on the surface of hexagonal prism‐shaped Cu3(TAA)3Cl3 precursors, and then the well‐defined solid core was produced through the Ostwald ripening of CuS‐GN. The electrocatalytic oxygen evolution reaction was employed as a probe reaction to gain insight into the properties of CuS‐FSMs, which exhibited a high limiting current density of 92.4 mA cm−2 and stability in 1 M KOH electrolyte. [ABSTRACT FROM AUTHOR]

The structural, compositional, electronic and luminescent properties of covelite (CuS) have been studied using copper acetate with the thiourea, in the presence of water-butanol and water-cyclohexanol as mixed solvents. The Hexagonal structure of the CuS samples was observed in the X-ray diffraction (XRD) pattern, which is due to different mixed solvents. The Cu S bond and atomic weight percentage were identified by the Fourier Transform Infrared (FT-IR) and Energy Dispersive X-ray (EDX) studies. The Scanning Electron Microscope (SEM) of CuS particles revealed the rod and flake shaped morphologies for water-butanol, and water-cyclohexanol, respectively. The bandgap energies of CuS nanostructures were calculated from the UV–Visible (UV–Vis) absorption spectra, and optical band energy curve. The UV and visible emission bands were observed from the PL spectra; this was due to the sulfur vacancy defects. From the CV study, it was found that the water-cyclohexanol assisted CuS sample has enhanced electrochemical properties than water-butanol assisted CuS sample. From the efficiency of the catalysts, the percentage degradation of the cango red (CR) dye was estimated from the mixed solvents assisted CuS samples. [ABSTRACT FROM AUTHOR]

For the first time, a flower-like nanostructured CuS material was synthesised through a facile hydrothermal route using copper foil and brenstone as Cu and S sources, respectively. The obtained CuS was characterised by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy. The effects of the concentrations of the brenstone, reaction time, reaction temperature and NH4F additive on the morphologies of CuS nanostructures were studied in detail. It was found that morphological adjustment of the samples could be easily realised by optimising the amount of NH4F. However, the thickness of the CuS nanoplates highly depends on the combination of reaction time, reaction temperature and the concentrations of the brenstone and NH4F. [ABSTRACT FROM AUTHOR]

In this study, covellite (CuS) nanoparticles were synthesized through a facile and low temperature thermal decomposition method using [Cu(sal)]- oleylamine complex, (sal = salicylaldehydeato, prepared in situ from [Cu(sal)] and oleylamine as the precursors), and sulfur as the Cu source and S source, respectively. Scanning electron microscope, transmission electron microscope, electron diffraction and ultraviolet-visible absorption (UV-Vis) spectra were used for the characterization of the products. The effect of reaction parameters, such as the copper:sulfur molar ratio, the reaction temperature and the reaction time on the shape, size and phase of CuS nanostructures, was investigated. The results showed that the, covellite (hexagonal structure of CuS) with an average size between 20 and 45 nm could be obtained with the Cu:S molar ratio of 1: 3 at 105 °C for 60 min. With increasing the reaction temperature from 105 to 200 °C, non-stoichiometric CuS with the average size of 25-50 nm was obtained due to the different existing state of the released Cu ions from the copper-oleylamine complex. [ABSTRACT FROM AUTHOR]

The present work states the removal of organic compound using CuS photocatalyst under visible light irradiation. The CuS photocatalysts were synthesized by hydrothermal method by using copper nitrate as copper precursor and thiourea, sodium thiosulphate as sulfur precursors via hydrothermal route. The reaction was carried out at 150 °C for 24 h using water as a solvent. The prepared CuS nanostructures were analyzed by X-ray diffraction, FE-SEM, photoluminescence (PL), UV–vis spectroscopy and Fourier transform infrared spectroscopy (FT-IR). A detailed mechanism on the effect of sulfur source on CuS morphology has been elucidated. The catalytic process efficiency mainly depends upon the adsorption and electron transfer between the dye molecules. The successive decrement in the absorbance at 400 nm shows the effective decrease in 4-nitrophenol pollutant as monitored by UV–vis spectrophotometer. The as prepared CuS catalyst showed highly efficient and versatile photocatalytic activities as well as excellent recyclability in degrading organic contaminant viz. nitrobenzene and 4-nitrophenol under visible light irradiation. [ABSTRACT FROM AUTHOR]

Facile growth of CuS nanowires through self-assembly and their application as building blocks for near-infrared light-responsive functional films have been demonstrated. It is found that DNA is a key factor in preparing the CuS material with defined nanostructure. An exclusive oriented self-aggregate growth mechanism is proposed for the growth of the nanowires, which might have important implications for preparing advanced, sophisticated nanostructures based on DNA nanotechnology. By employing the hydrophilic CuS nanowire as an optical absorber and thermosensitive nanogel as guest reservoir inside alginate film, a new platform for the release of functional molecules has been set up. In vitro studies have shown that the hybrid film possesses excellent biocompatibility and the release rate of chemical molecules from the film could be controlled with high spatial and temporal precision. Our novel approach and the resulting outstanding combination of properties may advance both the fields of DNA nanotechnology and light-responsive devices. [ABSTRACT FROM AUTHOR]

Abstract: CuS nanostructures have been prepared by hydrothermal route using copper nitrate and thiourea as copper and sulfur precursors. Investigations were done to probe the effect of cationic surfactant viz. cetyl trimethyl ammonium bromide on the morphology of the products. Further studies have been done to know the influence of reaction time on the morphology of CuS nanostructures. Results demonstrated that the morphology of CuS was influenced by the reaction time and surfactant. X-ray diffraction pattern showed that the as-prepared CuS nanostructures were in pure hexagonal phase and UV–vis spectra reveal a strong absorption in the visible region of 400–800nm. A detailed mechanism has been elucidated for the growth of CuS nanostructures. The photocatalytic activity was evaluated by the decolorization of methylene blue (MB) dye under visible-light irradiation and results showed that 87% of the dye was degraded. Thus the as-prepared CuS catalysts are highly promising materials for photocatalytic applications towards dye degradation. [Copyright &y& Elsevier]

CuS nanostructures were synthesized successfully via hydrothermal approach with new precursor. The precursor was characterized via thermal gravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FT-IR). The products were characterized with X-ray diffraction, scanning electron microscopy, transition electron microscopy, energy-dispersive X-ray spectroscopy, FT-IR, room temperature photoluminescence spectroscopy and ultraviolet-visible spectroscopy. The effect of different parameters such as Cu/TGA mole ratio, reaction time and temperature were investigated on product size and morphology. [ABSTRACT FROM AUTHOR]

A series of CuS nanostructures were synthesized by a simple wet chemical method on a large scale in the presence of cetyltrimethylammonium bromide at low temperature. Three typical samples were selected to study the relationship between the morphologies and resulting physical properties. The optical properties of CuS hierarchical structures were investigated by UV/Vis and Raman spectroscopy and the excellent photocatalytic performance was also evaluated by measuring the decomposition rate of methylene blue under natural light. As an absorber, the selected CuS nanostructures possess excellent microwave absorbing properties. When the thickness of the absorber is 3.5 mm, the minimum reflection loss can reach −76.4 dB at 12.64 GHz. The enhanced photocatalytic performance and microwave absorbing properties were also explained based on morphologies of the nanostructures. [ABSTRACT FROM AUTHOR]

As a new precursor, [bis(thiosemicarbazide)copper(II)]chloride; ([Cu(TSC)]Cl), complex was used in thermal decomposition process for the synthesis of CuS nanocrystals. The steric hindrance of the precursor raises the need of using co-surfactant, therefore oleylamine (CHN) and triphenylphosphine (CHP) were applied as solvent and surfactant of the reaction. CuS nanocrystals were synthesized via hydrothermal decomposition of [bis(thiosemicarbazide) copper(II)] without any surfactant. The products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, and photoluminescence spectroscopy. Synthesized copper sulfide nanostructures have average size of 20-50 nm. Finally, optical properties of the products were examined and investigated by PL spectra. [ABSTRACT FROM AUTHOR]

Abstract: In the present work, 3D flowerlike CuS nanostructures were synthesized via a facile hydrothermal process using Cu2O hollow microspheres as templates. Reaction of Cu2O hollow microspheres with thioacetamide at 40°C for 2h followed by hydrothermal treatment at 120°C for 12h resulted in high yield of 3D flowerlike structure with diameters ranging from 200 to 300nm. The Influence of experimental parameters on the morphology of the CuS nanostructures was investigated in detail. Different stages of the formation process were studied and thus the formation mechanism of the 3D flowerlike CuS nanostructures was presented. [Copyright &y& Elsevier]

Abstract: Uniform copper sulfide hollow nanospheres were obtained in high yield by reacting copper nitrate with thioacetamide in water at room temperature under the assistance of sodium dodecyl sulfate (SDS). The spheres (average diameter of ca. 200nm) displayed big cavity while their surface were constructed by randomly stacked nanoflakes. The products were characterized by X-ray diffraction (XRD), energy-dispersive X-ray spectrometry (EDX), field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). SDS was found to play a key role in the synthesis process while a four-step mechanism was proposed to explain the formation of hollow nanospheres. The influence of SDS concentration on the size and shape of the product has also been investigated in detail. [Copyright &y& Elsevier]

[Display omitted] • Two kinds of 3D CuS nanospheres assembled by nanoflakes are purposely synthesized. • IL [Bmim]Cl act as an efficient template for the formation of flake-like building blocks. • [Bmim]Cl with special viscosity play a vital role in controlling the structure of the sample. • Compact CuS nanospheres possess better capacitive properties than loose CuS nanospheres. Two hierarchical CuS nanostructures assembled by nanoflakes with exposed (0 0 1) facets are purposely synthesized using ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) as solvent-template. [Bmim]Cl can act as efficient template for the formation of flake-like building blocks by adsorbing on the (0 0 1) facet of CuS. More importantly, the viscosity of [Bmim]Cl can be altered by changing the temperature; thereby, the self-assemble process of the building blocks can be controlled and accordingly the shapes of the products are "tailored". The structural properties of the as-formed compact CuS nanoflowers (C-CuS) and loose CuS nanoflowers (L-CuS) are tested by XRD, SEM, TEM, HRTEM, and XPS, and the growth mechanisms are discussed in depth. When used as the electrode materials for supercapacitors, C-CuS exhibit higher specific capacitance and better rate capability than L-CuS. The improved capacitive performance of C-CuS may be due to the structural synergistic effect of ultrathin building units and dense hierarchical nanostructure. [ABSTRACT FROM AUTHOR]

Abstract: CuS nanoplates have been successfully prepared in the presence of cation surfactant cetyltrimethylammonium bromide (CTAB) by hydrothermally treating the solution of CuCl2·2H2O and Na2S·9H2O at 180 °C for 24 h. The as-prepared CuS nanoplates are of hexagonal phase and are single crystal. The thickness and edge length of the nanoplates are about 15 nm and 60 nm, respectively. The products was characterized by field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, photoluminescence measurements and ultraviolet–visible light spectrophotometer. The influences of synthetic parameters, such as reaction time and CTAB, on the morphologies of the products have been investigated. [Copyright &y& Elsevier]

• CuS hierarchical micro structures were synthesized using solvothermal technique through mixed solvents. • Solvent play a crucial role in governing growth and determining the final morphology of the CuS architectures. • The prepared sample showed excellent efficiency towards photocatalysis applications. A variety of high-quality, shape and size consistent nanostructures of copper sulfide (CuS) in the form of hierarchical architectures composed of intersecting nano-sheets have been fabricated via mixed solvent route. Copper chloride and thiourea have been utilized as precursors for copper and sulfur sources for each experimentation in the presence of a variety of mixed solvents to obtain various morphologies of CuS. The prepared products have been characterized by X-ray powder diffraction (XRD) and all of the synthesized products have been investigated to be the phase pure single crystalline. Scanning Electron Microscopy (SEM) revealed the well-ordered and isolated particles. The Energy Dispersive Spectroscopy (EDS) spectrum further proved that the obtained products in all of the synthetic processes don't contain any kind of impurity. Ultraviolet– visible–near infrared (UV–vis–NIR) transmittance spectrophotometer has been utilized to ascertain the optical properties of the as prepared nanostructures. An extended U.V absorption in near-IR region, indicate the covellite phase of CuS. Most importantly, the synthesized nanostructures demonstrated an excellent photo-catalyst response in degrading highly concentrated rhodamine B (RhB) dye aqueous solutions under visible light irradiation along with an excellent reusability, suggesting a promising application in wastewater purification. The excellent photo-catalytic activity has been attributed to surface hierarchical structure with good absorbing and adsorbing properties, high visible light utilization and low electron hole recombination rate. [ABSTRACT FROM AUTHOR]