Materials Literature
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The monolayers of group VI transition metal dichalcogenides feature a valence band spin splitting with opposite sign in the two valleys located at corners of 1st Brillouin zone. This spin-valley coupling, particularly pronounced in tungsten dichalcogenides, can benefit potential spintronics and valleytronics with the…
Semiconductor quantum dots (QD) have received considerable interest as a novel material in solar energy conversion devices. The attractive property of these dots is known as “quantum size effect”, where the band gap energy becomes larger by reducing QD size. By employing this concept, the light absorption wavelength r…
Dimensionally Stable Anodes (DSA) were invented by Henri Beer in 1965 under the brand name DSA. These electrodes are characterized by their shape and structural integrity and included a catalytic coating with corrosion resistance properties [1-2]. These materials are very appealing for many applications because of the…
Determination of the material properties of powders is critical in very many industries yet crucial transformations such as the transition from a free-flowing powder to a caked powder defy quantitative measurement. In particular, distinguishing between the onset of caking (so that it may be prevented, for example) and…
It has been known that LiBH4 has a hexagonal crystal structure with a high ionic conductivity (~ 10-3 S/cm) above ~ 110 ℃, although it undergoes a reversible phase transformation to an orthorhombic crystal structure with a low ionic conductivity (~ 10-8 S/cm) below the phase transition temperature. So, many researcher…
A framework is developed to simulate the acoustic streaming and the formation of conical bubble structures (CBS) in ultrasonic horn reactors. In these reactors, acoustic pressure waves propagate from the vibrating solid horn to the liquid. On its movements away from the horn, sound is attenuated producing acoustic str…
In this paper, effective design method of linear induction motor(LIM) for Maglev is proposed in order to maximize system efficiency of Maglev. For the high system efficiency of Maglev, it is important to minimize weight of traction motor. Light weight design by changing materials of core and winding is conducted witho…
Contrast imaging relies on pulsing schemes like pulse inversion (PI), power-modulated pulse inversion (PMPI), and power modulation (PM) to isolate certain harmonic components. These multi-pulse schemes normally employ single frequency pulses (SFP). In this work, we propose dual frequency pulses (DFP) coupled with puls…
In this study, we synthesized Ag₂Se nanoparticles (NPs) in an aqueous solution and investigated the thermoelectric characteristics of Ag₂Se NPs thin films on plastic substrates. Regardless of thermal annealing treatment, all the Ag2Se NPs thin films show the negative Seebeck coefficients, indicating the n-type charact…
The paper provides the results of experimental research into the influence of aluminum oxy-hydroxide nano-structured powders on the microstructure of modified layers. It has been demonstrated aluminum oxy-hydroxide nano-structured powders AlO(OH) applied as modifiers bring about the decrease in dendrite dimensions, su…
The development of efficient, abundant, and inexpensive oxygen reaction catalysts is essential for renewable energy research. The oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) play critical roles in the development of important energy conversion and storage devices - fuel cells and metal-air batt…
The cavitation bubble distribution (cavitation structure) is spatially inhomogeneous in ultrasonic field. A quasi-emulsion phenomenon of cavitation structure is reported in this paper. The inception process of cavitation bubble cloud in a thin liquid layer (the thin liquid layer is trapped between a radiating surface…
Since the discovery of Sc3N@C80 in 1999, much literature has focused on isolating metallic nitride clusters (M3N) entrapped within the smaller C80 cage. Over time, scientists (e.g., Echegoyen) have explored the same M3N clusters, but with bigger cage sizes, to expand the family of M3N@C2n. While HPLC has been the domi…
In this work we present our results of an approach to assess material property changes with time due to high temperature ageing in an isotropic conductive adhesive. A molecular model of an epoxy with similar primary chemistry is investigated by molecular dynamics simulations. By variation of crosslink density, one sup…
Time-varying loads negatively affect the properties and structure of materials. Structural failures typically occur at loads below the yield point. In this work, fatigue tests of welded joints of low-alloy steels were carried out in an asymmetric cycle at loads of 60 and 80% of the yield strength. The stress ratio was…
Recent clinical successes of transcranial focused ultrasound have occurred in the treatments of essential tremor, neuropathic pain, and Parkinson's disease, among others. We will present results of an investigation into the synthesis of multiple foci using iterative steering through multiple points and phased array co…
Flexible zinc-air batteries were fabricated using an inexpensive screen-printing technique. The anode and cathode current collectors were printed using commercial nanosilver conductive ink on a polyethylene terephthalate (PET) substrate and a polypropylene (PP) membrane, respectively. Air cathodes made of blended acti…
We evaluated the feasibility of thermal ablation in using a 230 kHz transcranial MRI-guided Focused Ultrasound (TcMRgFUS) system in three rhesus macaques. Thalamic targets were sonicated at 40–50s at 90–560 acoustic Watts. Focal heating sufficient to create an MRI-evident lesion was achieved in 4/6 targets where therm…
Proton Exchange Membrane Fuel Cells (PEMFC) are high-efficiency energy converters that can be deployed for mobile, transport and stationary applications in an eco-friendly manner. Nevertheless, their large-scale development requires further improvements, specifically regarding their lifetime in operation1. In abnormal…
Focused ultrasound (FUS) holds great promise for the development of effective and safe anticancer treatment protocols. FUS does not only allow to modulate the permeability of tumor vessels and enhance the extravasation of large molecules but to also locally trigger the release of their highly penetrating cargo. To uti…