Influence of transition metal ion Ni2+ on optical, electrical, magnetic and antibacterial properties of phyto-synthesized CuO nanostructure

Arun, Lija; Karthikeyan, Chandrasekaran; Philip, Daizy; Dhayanithi, D.; Giridharan, N. V.; Unni, C.

doi:10.1007/s11082-018-1684-9

Cited by 22 publications

(3 citation statements)

References 46 publications

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“…The space charge at grain boundaries and polarization effect at the electrodes caused a higher dielectric constant at a temperature of ≥50°C, as shown in Figure b. Polarization and dielectric constant were also enhanced due to the additional thermal energy released to the bound charges . However, with the increase in temperature beyond a certain limit, the dielectric constant was decreased.…”

Section: Results and Discussionmentioning

confidence: 99%

“…Polarization and dielectric constant were also enhanced due to the additional thermal energy released to the bound charges. 25 However, with the increase in temperature beyond a certain limit, the dielectric constant was decreased. This decrease could be attributed to freezing and stopping of the excessive charges as well as the complete spin ordering of the constituent's elements.…”

Section: Methodsmentioning

confidence: 99%

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Electrical, Photocatalytic, and Humidity Sensing Applications of Mixed Metal Oxide Nanocomposites

et al. 2020

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Mixed metal oxide nanocomposites (NCs) comprising Cu–Sr (CS), Sr–Cd (SC), and Cd–Cu (CC) were fabricated via a sol–gel method. Structural investigations of fabricated samples were carried out via X-ray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS), and X-ray photoelectron spectroscopy (XPS). The Maxwell–Wagner model, attributing to poor conducting layers around the conducting grains, was indicated to be followed by all of the NCs while investigating the dielectric properties. The Space-charge polarization and hoping mechanism contributed to low AC conductivity at lower frequencies and high AC conductivity at higher frequencies. The as-synthesized NCs effectively degraded two toxic water contaminants, such as crystal violet (CV) and Congo red (CR). Furthermore, the NCs were also evaluated for humidity sensing measurements. All of the NCs indicated efficient response/recovery time with better stability. The extensive investigation suggested the synthesized NCs, well suited for various optical and microelectronic applications.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Electrical, Photocatalytic, and Humidity Sensing Applications of Mixed Metal Oxide Nanocomposites

et al. 2020

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“…The emission spectra of the ZnO NPs with six peaks at 386, 395, 410, 459 and 488 nm are defined. The emission spectra observed at 380 and 395 nm range (band to band transition at UV region) are mainly attributed to radiative recombination of the free excitonexciton collision [14], 410 nm (violet emission) electron transition from a shallow donor level of the natural zinc interstitials to the top level of the valence band [15], 433 nm (blue emission) singly ionized Zn vacancies and surface defects in the ZnO NPs [16], 459 and 488 nm (blue-green emission) corresponding to the transition between oxygen vacancy and oxygen interstitial defect vacancies [17,18].…”

Section: X-ray Diffraction Patterns Of Zno and Znnicafeomentioning

confidence: 99%

Preparation and Studies on ZnO Nanoparticles Doped with Ni, Ca and Fe

Kumar¹,

Sivakumar²,

Dejene³

et al. 2021

J. Nano- Electron. Phys.

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The nanostructures of metal oxides are playing a vital role in determining the characteristics such as magnetic, optical, and electrical properties. In this work, nanostructured ZnO based composites were prepared and their magnetic and optical properties were estimated. The as-prepared composite is composed of Zn0.09(Ni0.05Ca0.05)Fe0.01O (ZnNiCaFeO) using co-precipitation method followed by sintering process. To distinguish the role of composites, bare ZnO is also prepared, and its properties are compared with the composite material. Both ZnNiCaFeO) exhibited hexagonal wurtzite structure with the grain size of about 52 and 46 nm, respectively. Hexagonal nanorod structured morphology and the atomic percentage of the asprepared composites are obtained from the FESEM and EDAX analysis, respectively. UV-Vis absorption spectra of the samples showed absorption peaks at 296 (ZnO) and 288 nm for ZnNiCaFeO NPs. Excitation wavelengths of the composite materials are also estimated from the PL studies. It is noted that composite ZnNiCaFeO exhibited ferromagnetic behavior with the significant magnetization values of 0.34914 emu/g. Thus, the obtained results indicate the composites can be used in soft magnetic application as well as in various optical.

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Potential of Biogenic Plant-Mediated Copper and Copper Oxide Nanostructured Nanoparticles and Their Utility

Singh

2019

Nanotechnology in the Life Sciences

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Influence of transition metal ion Ni2+ on optical, electrical, magnetic and antibacterial properties of phyto-synthesized CuO nanostructure

Cited by 22 publications

References 46 publications

Electrical, Photocatalytic, and Humidity Sensing Applications of Mixed Metal Oxide Nanocomposites

Electrical, Photocatalytic, and Humidity Sensing Applications of Mixed Metal Oxide Nanocomposites

Preparation and Studies on ZnO Nanoparticles Doped with Ni, Ca and Fe

Potential of Biogenic Plant-Mediated Copper and Copper Oxide Nanostructured Nanoparticles and Their Utility

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