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Enhancing the degradation rate and biomineralization nature of antiferromagnetic Fe-20Mn alloy by groove pressing.
J Biomed Mater Res A
October 2024
Department of Biotechnology, Indian Institute of Technology Madras, Chennai, India.
The Fe-Mn alloys are potential candidates for biodegradable implant applications. However, the very low degradation rates of Fe-Mn alloys in the physiological environment are a major disadvantage. In this study, the degradation rate of a Fe-20Mn alloy was improved using the groove pressing (GP) technique.
View Article and Find Full Text PDFThe Lattice Model of Particles with Orientation-Dependent Interactions at Solid Surfaces: Wetting Scenarios.
Int J Mol Sci
October 2022
Department of Theoretical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, MCS University, 20031 Lublin, Poland.
Wetting phenomena in a lattice model of particles having two chemically different halves (A and B) and being in contact with solid substrates have been studied with Monte Carlo methods. The energy of the interaction between a pair of neighboring particles has been assumed to depend on the degree to which the AA, AB and BB regions face each other. In this work, we have assumed that uAA=-1.
View Article and Find Full Text PDFMicroscopic Origin of the Effective Spin-Spin Interaction in a Semiconductor Quantum Dot Ensemble.
Phys Rev Lett
October 2022
Department of Physics, Technical University Dortmund, Otto-Hahn-Straße 4, 44227 Dortmund, Germany.
We present a microscopic model for a singly charged quantum dot (QD) ensemble to reveal the origin of the long-range effective interaction between the electron spins in the QDs. Wilson's numerical renormalization group (NRG) is used to calculate the magnitude and the spatial dependency of the effective spin-spin interaction mediated by the growth-induced wetting layer. Surprisingly, we found an antiferromagnetic Heisenberg coupling for very short inter-QD distances that is caused by the significant particle-hole asymmetry of the wetting layer band at very low filling.
View Article and Find Full Text PDFComparative electrochemical energy storage performance of cobalt sulfide and cobalt oxide nanosheets: experimental and theoretical insights from density functional theory simulations.
Phys Chem Chem Phys
April 2020
Centre for Nano and Material Sciences, Jain University, Jain Global Campus, Ramanagaram, Bangalore 562112, India.
In this study, we have carried out studies on supercapacitor performance comparing cobalt oxide (Co3O4) with cobalt sulfide (Co3S4) nanosheets grown using a facile electrodeposition approach. We have investigated the origin of enhanced energy storage performance of Co3S4 as compared to Co3O4 both by supported experiments and density functional theory investigations. Cobalt oxide exhibits a specific capacitance of 200 F g-1 at a current density of 2 A g-1, whereas a high specific capacitance of 558 F g-1 was achieved in the case of the Co3S4 nanosheets.
View Article and Find Full Text PDFZnCr2O4 Nanoparticles: Facile Synthesis, Characterization, and Photocatalytic Properties.
Sci Rep
February 2016
Nanotechnology &Catalysis Research Centre (NANOCAT), IPS Building, University of Malaya, 50603 Kuala Lumpur, Malaysia.
In this work, zinc chromite (ZnCr2O4) nanostructures have been synthesized through co-precipitation method. The effect of various parameters such as alkaline agent, pH value, and capping agent type was investigated on purity, particle size and morphology of samples. It was found that particle size and morphology of the products could be greatly influenced via these parameters.
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