The effect of different annealing temperatures on structural, optical and magnetic properties of ZnFeO nanoparticles prepared using the coprecipitation technique has been investigated. With the increase in annealing temperature, crystallinity and average crystallite size of nanoparticles increased. The average crystallite size was found to be 5.55 nm, 6.62 nm and 32.9 nm for the samples annealed at 300 °C, 500 °C and 700 °C, respectively. The X-ray diffraction and Fourier-transform infrared spectroscopy revealed the formation of a cubic spinel structure. The optical direct and indirect bandgap energy decreased with an increase in annealing temperature. The saturation magnetization increased from 16.38 emu/g to 25.91 emu/g. The M-H curves depicted the magnetic phase transition from superparamagnetic to ferrimagnetic. The electrical properties were investigated using an impedance analyzer in the frequency range of 300 Hz to 1 MHz. The conduction properties showed enhancement with increased annealing. The humidity sensing properties were investigated in the range of 15-90% RH and revealed a strong dependence of adsorption capacity on the annealing temperature. Electrical conductivity improved with increased humidity. Excellent humidity sensitivity was observed for ferrites annealed at 700 °C attributed to increased crystallinity and reduced lattice strain making them a potential candidate for use in humidity sensors.
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http://dx.doi.org/10.1007/s00339-021-04755-8 | DOI Listing |
Phys Chem Chem Phys
January 2025
Department of Physics, Indian Institute of Technology (IIT) Delhi, New Delhi 110016, India.
The concept of inert matrix fuel (IMF) has been proposed to utilize the energetic value of Pu and transmute minor actinides in nuclear reactors. In order to offset the initial reactivity of nuclear fuel, gadolinium (Gd) is employed as a burnable poison, owing to its high neutron absorption cross-section. To gain insights into the radiation stability and influence of grain boundaries on irradiation behaviour, 5 mol% Gd-doped ceria samples, sintered at varying temperatures, were subjected to irradiation using 400 Kr ions.
View Article and Find Full Text PDFErbium-implanted silicon (Er:Si) holds promise for quantum networking, but the formation of multiple Er centers poses a challenge. We show that the cubic center (Er-C) has C or lower symmetry and propose all Er centers range between full Si- and full O-coordination. By co-implanting Si with Er and O (both 10cm) and increasing the thermal anneal quenching rate from ∼100 °C/s to ∼1000 °C/s, we shifted the dominant optically active center from ErO clusters to the Er-C center with mixed Si and O coordination.
View Article and Find Full Text PDFPlant Dis
January 2025
INRA Bordeaux, UMR 1332 Biologie du Fruit et Pathologie, INRA - Université de Bordeaux, CS20032, Villenave d'Ornon , France, 33882 cedex;
Privet leaf blotch-associated virus (PLBaV) is an Idaeovirus discovered by high-throughput sequencing (HTS) in privet (Ligustrum japonicum L) in southern Italy in 2017 (Navarro et al., 2017). In privet, it causes a leaf blotch disease with yellowish or whitish chlorotic blotches or ringspots.
View Article and Find Full Text PDFDalton Trans
January 2025
Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstraße 30, 48149 Münster, Germany.
The cadmium-rich intermetallic compounds RhCd ( = Ca, Sr, Y, La-Nd, Sm-Lu) were synthesized from the elements in sealed tantalum tubes. The elements were reacted in an induction furnace and the samples were post-annealed to increase phase purity and crystallinity. The RhCd phases crystallize with the cubic CeCrAl type structure, space group 3̄.
View Article and Find Full Text PDFBio Protoc
January 2025
International Institute of Food Innovation Co., Ltd., Nanchang University, Nanchang, China.
PCR-based genome walking is one of the prevalent techniques implemented to acquire unknown flanking genomic DNAs. The worth of genome walking includes but is not limited to cloning full-length genes, mining new genes, and discovering regulatory regions of genes. Therefore, this technique has advanced molecular biology and related fields.
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