Structure and microstructure dependent transport and magnetic properties of sol–gel grown nanostructured La 0.6 Nd 0.1 Sr 0.3 MnO 3 manganites: Role of oxygen

Kansara, Sanjay; Dhruv, Davit; Joshi, Zalak; Pandya, D.D.; Rayaprol, Sudhindra; Solanki, P.S.; Shah, N.A.; Shah, N.A.

doi:10.1016/j.apsusc.2015.08.111

Cited by 59 publications

(4 citation statements)

References 38 publications

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“…Nanophasic ZnO was successfully synthesized by using acetate precursor-based sol-gel route ( Kuberkar et al, 2012 ; Kansara et al, 2015 ). Zinc acetate [Zn (CH 3 COO) 2 × 2H 2 O] was dissolved in 25 mL double distilled water by maintaining 0.4 M solution with continuous stirring at 90°C with 4000 rpm for 30 min.…”

Section: Methodsmentioning

confidence: 99%

Mechanism of Anti-bacterial Activity of Zinc Oxide Nanoparticle Against Carbapenem-Resistant Acinetobacter baumannii

et al. 2018

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Acinetobacter baumannii is a multi-drug resistant opportunistic pathogen, which causes respiratory and urinary tract infections. Its prevalence increases gradually in the clinical setup. Carbapenems (beta-lactam) are most effective antibiotics till now against A. baumannii, but the development of resistance against it may lead to high mortality. Therefore, it is of utmost importance to develop an alternative drug against A. baumannii. In the present study, we have synthesized ZnO nanoparticle (ZnO-NP) and characterized by X-ray diffraction, Fourier transform infrared (FTIR) spectroscopy and UV-Visible spectroscopy. Prepared ZnO-NPs have the size of 30 nm and have different characteristics of ZnO-NPs. Growth kinetics and disk diffusion assay showed that ZnO-NP demonstrated good antibacterial activity against carbapenem resistant A. baumannii. We have also investigated the mechanism of action of ZnO-NPs on the carbapenem resistant strain of A. baumannii. The proposed mechanism of action of ZnO involves the production of reactive oxygen species, which elevates membrane lipid peroxidation that causes membrane leakage of reducing sugars, DNA, proteins, and reduces cell viability. These results demonstrate that ZnO-NP could be developed as alternative therapeutics against A. baumannii.

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Section: Methodsmentioning

confidence: 99%

Mechanism of Anti-bacterial Activity of Zinc Oxide Nanoparticle Against Carbapenem-Resistant Acinetobacter baumannii

et al. 2018

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“…3,4 In most of the cases, mixed valent manganites are used as conducting (or semiconducting) channels in these bilayered structures because manganites are highly sensitive to small external perturbations by temperature, magnetic field, electric field, current, voltage, pressure, ion irradiation, ion implantation, light illumination, synthesis parameters, etc. 5,6 Also, the magnetic and transport properties of the manganite channel are strongly governed by spin-latticecharge-orbital degrees of freedom. 7,8 Nanoscale non-homogeneity and the microscale phase separation scenario also affect various possible ground states in mixed valent manganites.…”

Section: Introductionmentioning

confidence: 99%

Transport properties and electroresistance of a manganite based heterostructure: role of the manganite–manganite interface

Gadani

Dhruv

Joshi

et al. 2016

Phys. Chem. Chem. Phys.

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In this paper, we report the results of the investigations on the transport properties performed across the manganite-manganite interface in the LaMnO3-δ/La0.7Ca0.3MnO3/LaAlO3 (LMO/LCMO/LAO) heterostructure. The bilayered heterostructure was synthesized by a low cost and simple chemical solution deposition (CSD) method by employing the acetate precursor route. The same LMO/LCMO/LAO heterostructure was also grown using the dry metal oxide chemical vapor deposition (CVD) method and the results of transport characterization have been compared on the basis of wet and dry chemical methods used. XRD Φ-scan measurements were carried out to verify the structural quality and crystallographic orientations of LMO and LCMO manganite layers, for both wet and dry chemical method grown heterostructures. For wet and dry chemical methods, the temperature dependent resistance of the LMO/LCMO interface suggests the metallic nature. The asymmetric I-V curves collected at different temperatures show normal diode characteristics which get transformed to backward diode characteristics at high temperatures under high applied voltages at Vtr for both the methods. The values of Vtr are strongly dependent on the chemical method used. I-V data have been fitted using the Simmons model at different temperatures and discussed in terms of the spin-flip scattering mechanism for both wet and dry chemical method grown heterostructures. The electric field dependent electroresistance (ER) behavior of the presently studied LMO/LCMO manganite-manganite interface, grown using wet and dry chemical methods, has been understood on the basis of complex mechanisms including charge injection, formation of the depletion region, the tunneling effect, thermal processes and junction breakdown and their dependence on the applied electric field, field polarity and temperature studied.

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“…The onset of disappearance of these disorders is believed to happen upon annealing, where oxygen vacancies at grain boundaries are suspended, resulting in enhancement of the grain size. 64 This is clearly established through XPS analysis on high-temperature-sintered samples. The oxygen vacancies have significantly reduced, turning LCM11 into a stoichiometric specimen.…”

Section: Resultsmentioning

confidence: 83%

Influence of heat sintering on the physical properties of bulk La_0.67Ca_0.33MnO₃ perovskite manganite: role of oxygen in tuning the magnetocaloric response

Nadig,

M. S.,

Daivajna

2024

Phys. Chem. Chem. Phys.

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Structure and microstructure dependent transport and magnetic properties of sol–gel grown nanostructured La 0.6 Nd 0.1 Sr 0.3 MnO 3 manganites: Role of oxygen

Cited by 59 publications

References 38 publications

Mechanism of Anti-bacterial Activity of Zinc Oxide Nanoparticle Against Carbapenem-Resistant Acinetobacter baumannii

Mechanism of Anti-bacterial Activity of Zinc Oxide Nanoparticle Against Carbapenem-Resistant Acinetobacter baumannii

Transport properties and electroresistance of a manganite based heterostructure: role of the manganite–manganite interface

Influence of heat sintering on the physical properties of bulk La_0.67Ca_0.33MnO₃ perovskite manganite: role of oxygen in tuning the magnetocaloric response

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Structure and microstructure dependent transport and magnetic properties of sol–gel grown nanostructured La 0.6 Nd 0.1 Sr 0.3 MnO 3 manganites: Role of oxygen

Cited by 59 publications

References 38 publications

Mechanism of Anti-bacterial Activity of Zinc Oxide Nanoparticle Against Carbapenem-Resistant Acinetobacter baumannii

Mechanism of Anti-bacterial Activity of Zinc Oxide Nanoparticle Against Carbapenem-Resistant Acinetobacter baumannii

Transport properties and electroresistance of a manganite based heterostructure: role of the manganite–manganite interface

Influence of heat sintering on the physical properties of bulk La0.67Ca0.33MnO3 perovskite manganite: role of oxygen in tuning the magnetocaloric response

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Influence of heat sintering on the physical properties of bulk La_0.67Ca_0.33MnO₃ perovskite manganite: role of oxygen in tuning the magnetocaloric response