Low-temperature synthesis of core/shell of Co3O4@ZnO nanoparticle characterization and dielectric properties

Alturki, Asma M.

doi:10.1007/s40097-018-0260-y

Cited by 10 publications

(3 citation statements)

References 20 publications

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“…101), ( 012), ( 110), (112), and (013) planes, respectively. As shown in Figures 5(a) and 5(b), all the difraction peaks of the Co 3 O 4 @ZnO core-shell NPs within CZCS (1), CZCS (2), and CZCS (3) have ftted the peaks of the corresponding parent particles which is similar to the previous work report [29].…”

Section: Resultssupporting

confidence: 86%

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In Situ Green Synthesis of Co3O4@ZnO Core-Shell Nanoparticles Using Datura stramonium Leaf Extract: Antibacterial and Antioxidant Studies

Tadesse,

Ananda Murthy,

Ravikumar

et al. 2023

Bioinorganic Chemistry and Applications

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Investigating and synthesizing potent antibacterial NPs using biological methods is highly preferred, and it involves nontoxic, cost-effective, and environmentally friendly chemicals and methods. Antibiotic drug resistance and oxidative stress have become a serious public health issue worldwide. Hence, the key objective of this study was to biologically synthesize and characterize the potent antibacterial Co3O4@ZnO core-shell nanoparticles for the antibacterial application. The radical scavenging ability of green synthesized Co3O4@ZnO core-shell nanoparticles was also determined. In this study, Co3O4@ZnO core-shell nanoparticles (CZCS NPs) have been synthesized using three different core to shell materials ratios of Co3O4 to ZnO (0.5 : 0.25 CZCS (1), 0.5 : 0.5 CZCS (2), and 0.5 : 0.75 M CZCS (3)) by employing Datura stramonium leaf extract. The polycrystalline nature of Co3O4@ZnO core-shell nanoparticles was investigated using the XRD and SAED characterization techniques. The investigated nanostructure of Co3O4@ZnO core-shell nanoparticles appeared with Co3O4 as the core and ZnO as an outer shell. Additionally, a variety of physicochemical properties of the nanoparticles were determined using various characterization techniques. The average crystallite sizes of CZCS (1), CZCS (2), and CZCS (3) were found to be 24 ± 1.4 , 22 ± 1.5 , and 25 ± 1.5 nm, respectively. The band gap energy values for CZCS (1), CZCS (2), and CZCS (3) determined from the UV-DRS data were found to be 2.75, 2.76, and 2.73 eV, respectively. The high inhibition activities against S. aureus, S. pyogenes, E. coli, and P. aeruginosa bacterial strains were obtained for the small size CZCS (2) nanoparticles at the concentration of 100 mg/mL with 22 ± 0.34, 19 ± 0 . 32 , 18 ± 0.45 , and 17 ± 0 .32 mm values, respectively. The high inhibition performance of CZCS (2) nanoparticles against Gram-positive and Gram-negative bacteria which is even above the control drug ampicillin is because of its small size and synergistic effect. The percentage scavenging activity of Co3O4@ZnO core-shell nanoparticles was also studied and CZCS (2) nanoparticles showed a good scavenging capacity (86.87%) at 500 μg/mL with IC50 of 209.26 μg/mL.

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Section: Resultssupporting

confidence: 86%

“…Co 3 O 4 , a white powder having a band gap of 1.48 eV, is an antiferromagnetic p-type semiconductor. It has a spinel crystal structure and is widely used in diferent applications and is developed as the core nanostructure [29,30]. In addition to cobalt oxide NPs, zinc oxide nanostructure has also received the attention of researchers.…”

Section: Introductionmentioning

confidence: 99%

In Situ Green Synthesis of Co3O4@ZnO Core-Shell Nanoparticles Using Datura stramonium Leaf Extract: Antibacterial and Antioxidant Studies

Tadesse,

Ananda Murthy,

Ravikumar

et al. 2023

Bioinorganic Chemistry and Applications

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“…For example, the high‐ ε ′ and E b film material can serve as an important energy storage component. Compared with traditional giant ε ′ inorganic ceramics such as lead zirconate titanate (PZT), barium titanate (BaTiO 3 ), copper calcium titanate (CCTO), and so on, polymers own many remarkable advantages, 5–8 including minimal dielectric loss, ultra‐high E b , good flexibility, light weight, easy processing, and low cost. Unfortunately, the bulk of polymers consistently have a rather low ε ′ (≤10) 9,10 .…”

Section: Introductionmentioning

confidence: 99%

Interface modified Si@SiO₂/PVDF composite dielectrics with synchronously ameliorative dielectric and mechanical properties

Kong

Zhou

Peng

et al. 2023

J of Applied Polymer Sci

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To efficaciously decrease dielectric loss while still synchronously harvesting a high dielectric constant (ε′) and breakdown strength (Eb), as well as good mechanical properties in silicon (Si)/poly(vinylidene fluoride) (PVDF), in this work, the core@shell structured Si@silicon dioxide (SiO2) particles were first prepared via a high temperature oxidation, and subsequently incorporated into the PVDF to generate morphology‐dependent composites with a high‐ε′ and Eb but low loss. The SiO2 shell effects on the morphology, dielectric, and mechanical properties of PVDF composites were explored. In comparison to pristine Si/PVDF, the Si@SiO2/PVDF presents significantly suppressed loss and boosted Eb because the SiO2 interlayer not only efficiently blocks the connection between the raw Si and greatly impedes the long‐range charges migration even at high filler loadings, but also obviously improves the compatibility between Si and PVDF at the interfaces which promotes fillers' uniform dispersion in host matrix, thus leading to enhanced dielectric and mechanical properties. The fitting result by the Havriliak–Negami equation theoretically elucidates the SiO2 interlayer's suppression effect on charge migration behavior in the composites. More importantly, dielectric properties can be efficiently turned via tailoring the SiO2 shell thickness. The Si@SiO2/PVDF with simultaneously enhanced dielectric and mechanical performances shows promising uses in the electrical and microelectronics industries.

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Synchronous enhancements in dielectric performances and thermal conductivity of β-SiCw/PVDF nanocomposites through building crystalline SiO2 shell as an interlayer

Zhou

et al. 2022

J Polym Res

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Low-temperature synthesis of core/shell of Co3O4@ZnO nanoparticle characterization and dielectric properties

Cited by 10 publications

References 20 publications

In Situ Green Synthesis of Co3O4@ZnO Core-Shell Nanoparticles Using Datura stramonium Leaf Extract: Antibacterial and Antioxidant Studies

In Situ Green Synthesis of Co3O4@ZnO Core-Shell Nanoparticles Using Datura stramonium Leaf Extract: Antibacterial and Antioxidant Studies

Interface modified Si@SiO₂/PVDF composite dielectrics with synchronously ameliorative dielectric and mechanical properties

Synchronous enhancements in dielectric performances and thermal conductivity of β-SiCw/PVDF nanocomposites through building crystalline SiO2 shell as an interlayer

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Low-temperature synthesis of core/shell of Co3O4@ZnO nanoparticle characterization and dielectric properties

Cited by 10 publications

References 20 publications

In Situ Green Synthesis of Co3O4@ZnO Core-Shell Nanoparticles Using Datura stramonium Leaf Extract: Antibacterial and Antioxidant Studies

In Situ Green Synthesis of Co3O4@ZnO Core-Shell Nanoparticles Using Datura stramonium Leaf Extract: Antibacterial and Antioxidant Studies

Interface modified Si@SiO2/PVDF composite dielectrics with synchronously ameliorative dielectric and mechanical properties

Synchronous enhancements in dielectric performances and thermal conductivity of β-SiCw/PVDF nanocomposites through building crystalline SiO2 shell as an interlayer

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Product

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Interface modified Si@SiO₂/PVDF composite dielectrics with synchronously ameliorative dielectric and mechanical properties