AbstractSputtered MoS2 coatings have been mostly used as a solid lubricant. In this investigation, MoSx/Ni composite coatings with Ni contents varying from 0 to 22 % were deposited onto steel substrate using a DC magnetron sputter process. The MoS2/Ni ratio in the coatings was controlled by sputtering the composite targets. The composition, microstructure, and mechanical properties of the...

Abstract Electro-ceramics based on the KNbO 3 ferroelectric system were synthesized from solid-state reaction sintering method. In particular, electrical properties have been investigated at room temperature in (1− x )KNbO − BaNi 1/2 Nb O 3−δ (KBNN) solid-solution. The dielectric relaxation mechanisms analyzed as a function of oxygen vacancy (δ) concentration and frequency dispersion complex pe...

The aim of this study was to establish the most efficient extraction conditions of betanin and to evaluate the termal stability of this red pigment in aqueous solution. The extraction of betanin from red beet (Beta vulgaris L.) was carried out under different conditions, varying the extraction parameters such as time and solid to solvent ratio, in acidic aqueous medium. The yields of the extrac...

Innovative rechargeable batteries that can effectively store renewable energy, such as solar and wind power, urgently need to be developed to reduce greenhouse gas emissions. All-solid-state batteries with inorganic solid electrolytes and electrodes are promising power sources for a wide range of applications because of their safet...

All-solid-state sodium-ion batteries are promising candidates for large-scale energy storage applications. The key enabler for an all-solid-state architecture is a sodium solid electrolyte that exhibits high Na(+) conductivity at ambient temperatures, as well as excellent phase and electrochemical stability. In this work, we present a first-principles-guided discovery and synthesis of a novel C...

range Yu Zhou, Ziyu Wang , Abdullah Rasmita, Sejeong Kim , Amanuel Berhane , Zoltán Bodrog, Giorgio Adamo , Adam Gali , Igor Aharonovich 2, 3 , Wei-bo Gao 1, 5* 1 Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore 2 School of Mathematical and Physical Sciences, University of Technology Sydney, Ulti...

By employing first-principles metadynamics simulations, we explore the 300 K structures of solid hydrogen over the pressure range 150-300 GPa. At 200 GPa, we find the ambient-pressure disordered hexagonal close-packed (hcp) phase transited into an insulating partially ordered hcp phase (po-hcp), a mixture of ordered graphene-like H(2) layers and the other layers of weakly coupled, disordered H(...

We have observed both superluminal and ultraslow light propagation in an alexandrite crystal at room temperature. Group velocities as slow as 91 meters per second to as fast as -800 meters per second were measured and attributed to the influence of coherent population oscillations involving chromium ions in either mirror or inversion sites within the crystal lattice. Namely, ions in mirror site...