Synthesis of Ag@Cu2O core-shell metal-semiconductor nanoparticles and conversion to Ag@Cu core-shell bimetallic nanoparticles

Yang, Ailing; Li, Shun-pin; Wang, Yujin; Wang, LeLe; Bao, Xichang; Yang, Renqiang

doi:10.1007/s11431-015-5797-0

Cited by 16 publications

(4 citation statements)

References 43 publications

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“…Very tiny nanodots of Ag (average diameter ∼4 nm), being surrounded by the layers of Cu 2 O, form the eyeball-like nanoheterostructures. The diameter of these quantum nanoheterostructures varies from 8 to 12 nm, which is much smaller than the previously reported Ag–Cu 2 O core–shell. ,− The inset of Figure a demonstrates the HRTEM image of a single eyeball-shaped nanoheterostructure. The lattice spacing of Ag nanoparticle is estimated as 0.24 nm, which corresponds to the (111) planes of the Ag face-centered cubic (fcc) phase .…”

Section: Resultsmentioning

confidence: 69%

Charge Transfer-Mediated Blue Luminescence in Plasmonic Ag–Cu₂O Quantum Nanoheterostructures

Ghose

Singh

Bhattacharya

2020

ACS Appl. Mater. Interfaces

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Metal–semiconductor hybrid nanoheterostructures have the possibility to exhibit new synergic properties other than the combination of properties from discrete components due to the interaction of metal and semiconductor components at the interfaces. Here, we have synthesized Ag–Cu2O eyeball-shaped quantum nanoheterostructures with diameter ranging between 8 and 12 nm using a single-step low-cost solvothermal process. It is observed that the presence of a minimum 3% of Ag is required for the formation of Ag–Cu2O quantum nanoheterostructures. The formation of nanoheterostructures has introduced new synergic properties like intense blue luminescence and surface-enhanced Raman scattering due to the interactions between Ag and Cu2O atoms at the interfaces. The significant presence of charge transfer through the interfaces is identified from the peak shift of Raman modes. The increase in the electron density at the metal surface due to the charge transfer and the recombination of these electrons with sp- or d-band holes of Ag could be the effective mechanism of the observed blue luminescence. The blue luminescence of Ag–Cu2O quantum nanoheterostructures together with its low band gap value (≈2.3 eV) is believed to have important applications in optoelectronic devices.

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Section: Resultsmentioning

confidence: 69%

Charge Transfer-Mediated Blue Luminescence in Plasmonic Ag–Cu₂O Quantum Nanoheterostructures

Ghose

Singh

Bhattacharya

2020

ACS Appl. Mater. Interfaces

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“…Ascorbic acid and polyvinyl pyrrolidone (PVP) were used as a reducer and preservative, respectively, to synthesize non-biogenic AgNPs 68 . PVP (0.8 g) was added to 80 ml of ascorbic acid solution (5 × 10 –4 mol l −1 ) and stirred for 20 min at room temperature.…”

Section: Methodsmentioning

confidence: 99%

Anticancer and antimicrobial activity of biosynthesized Red Sea marine algal silver nanoparticles

Algotiml

Gab-Alla

Seoudi

et al. 2022

Sci Rep

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Biosynthesis of silver nanoparticles (AgNPs) is emerging as a simple and eco-friendly alternative to conventional chemical synthesis methods. The role of AgNPs is expanding as antimicrobial and anticancer agents, sensors, nanoelectronic devices, and imaging contrast agents. In this study, biogenic AgNPs were synthesized using extracts of different marine algae species, including Ulva rigida (green alga), Cystoseira myrica (brown alga), and Gracilaria foliifera (red alga), as reducing and capping agents. The Physiochemical properties, cytotoxicity, anticancer and antimicrobial activities of the biosynthesized AgNPs were assessed. Surface plasmonic bands of the biosynthesized AgNPs capped with U. rigida, C. myrica, and G. foliifera extracts were visually observed to determine a colour change, and their peaks were observed at 424 nm, 409 nm, and 415 nm, respectively, by UV–Vis spectroscopy; transmission electron microscopy (TEM) indicated an almost spherical shape of AgNPs with nanoscale sizes of 12 nm, 17 nm, and 24 nm, respectively. Fourier transform-infrared (FTIR) spectroscopy analysis suggested that different molecules attached to AgNPs through OH, C=O, and amide groups. The major constituents of the aqueous algal extracts included, terpenoids, polyphenols, sulfonates, polysaccharides, fatty acids, chlorophylls, amide proteins, flavonoids, carotenoids, aliphatic fluoro compounds, volatile compounds, alkalines, pyruvic acid and agar groups. The cytotoxicity and anticancer activities of the biosynthesized AgNPs were assessed using Artemia salina nauplii, normal skin cell lines (HFb-4), and breast cancer cell lines (MCF-7 cell line). The lethality was found to be directly proportional to the AgNP concentration. The IC50 values of C. myrica and G. foliifera AgNPs against A. saline nauplii were 5 and 10 μg ml−1 after 4 h and 16 h, respectively, whereas U. rigida AgNPs did not exhibit cytotoxic effects. Anticancer activity of the biosynthesized AgNPs was dose dependent. The IC50 values of the biosynthesized AgNPs were 13, 13, and 43 µg ml−1 for U. rigida, C. myrica, and G. foliifera, respectively. U. rigida AgNPs particularly exhibited potent anticancer activity (92.62%) against a human breast adenocarcinoma cell line (MCF-7) with high selectivity compared the normal cells (IC50 = 13 µg/ml, SI = 3.2), followed by C. myrica AgNPs (IC50 = 13 µg/ml, SI = 3.07). Furthermore, the biosynthesized AgNPs exhibited strong antifungal activity against dermatophyte pathogenic moulds and mild antibacterial activity against the food borne pathogen bacteria. The highest antimicrobial activity was recorded for the U. rigida AgNPs, followed by those capped with C. myrica and G. foliifera extracts, respectively. AgNPs capped with the U. rigida extract exhibited the highest antimicrobial activity against Trichophyton mantigrophytes (40 mm), followed by Trichosporon cataneum (30 mm) and E. coli (19 mm), with minimal lethal concentration of 32 and 64 μg ml−1 respectively. The study finally revealed that extracts of marine algal species, particularly U. rigida extracts, could be effectively used as reducing agents for the green synthesis of AgNPs. These AgNPs are considered efficient alternative antidermatophytes for skin infections and anticancer agents against the MCF-7 cell line.

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“…Yang et al. used the same strategy in increasing the shell thickness of their hybrids [19] . In general, the two‐step approach allows for fine control of Cu 2 O shell growth over a broad range of thicknesses while preserving the size and shape of the Ag core, which can be extremely useful for property tuning.…”

Section: Hybrid Design and Synthetic Strategiesmentioning

confidence: 99%

Rational Design and Synthesis of Ag−Cu₂O Nanocomposites for SERS Detection, Catalysis, and Antibacterial Applications

Sayson

Regulacio

2022

ChemNanoMat

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With the growing desire to incorporate enhanced properties and multiple functions into a single nanostructured system, research on nanocomposites has intensified in recent years. Several material combinations have already been studied, giving rise to a rich library of hybrid nanomaterials. In this Minireview, attention is directed toward Ag−Cu2O nanocomposites, which integrate the strong plasmonic features of metallic Ag and the semiconducting properties of Cu2O. There are numerous ways by which these two materials can be arranged in a nanocomposite, leading to diverse types of hybrid configurations (e. g. core–shell, core–satellite, yolk–shell, Janus). The synthetic protocols that have been used in fabricating these different hybrid structures are amply discussed in this paper. Also described are the remarkable properties that arise from the union of Ag and Cu2O, and how these properties can be utilized in the fields of sensing, catalysis, and antibacterial treatment. Lastly, knowledge gaps and future directions are identified in the concluding section.

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Synthesis of Ag@Cu2O core-shell metal-semiconductor nanoparticles and conversion to Ag@Cu core-shell bimetallic nanoparticles

Cited by 16 publications

References 43 publications

Charge Transfer-Mediated Blue Luminescence in Plasmonic Ag–Cu₂O Quantum Nanoheterostructures

Charge Transfer-Mediated Blue Luminescence in Plasmonic Ag–Cu₂O Quantum Nanoheterostructures

Anticancer and antimicrobial activity of biosynthesized Red Sea marine algal silver nanoparticles

Rational Design and Synthesis of Ag−Cu₂O Nanocomposites for SERS Detection, Catalysis, and Antibacterial Applications

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Synthesis of Ag@Cu2O core-shell metal-semiconductor nanoparticles and conversion to Ag@Cu core-shell bimetallic nanoparticles

Cited by 16 publications

References 43 publications

Charge Transfer-Mediated Blue Luminescence in Plasmonic Ag–Cu2O Quantum Nanoheterostructures

Charge Transfer-Mediated Blue Luminescence in Plasmonic Ag–Cu2O Quantum Nanoheterostructures

Anticancer and antimicrobial activity of biosynthesized Red Sea marine algal silver nanoparticles

Rational Design and Synthesis of Ag−Cu2O Nanocomposites for SERS Detection, Catalysis, and Antibacterial Applications

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Product

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Charge Transfer-Mediated Blue Luminescence in Plasmonic Ag–Cu₂O Quantum Nanoheterostructures

Charge Transfer-Mediated Blue Luminescence in Plasmonic Ag–Cu₂O Quantum Nanoheterostructures

Rational Design and Synthesis of Ag−Cu₂O Nanocomposites for SERS Detection, Catalysis, and Antibacterial Applications