Materials Literature
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Composite thermochromic and phase-change materials (CTPCM) containing bromocresolpurple, boric acid, and tetradecyl alcohol were prepared by sol–gel method. The thermochromic behavior and thermal properties of CTPCM were studied. The characterization of the CTPCM including the particle size, size distribution, FTIR sp…
Electrochemical aptasensors can detect different cancer biomarkers to provide point-of-care diagnosis that is low cost, rapid, specific and sensitive. In this work, we described the development of an electrochemical single-use aptasensor for detection and analysis of vascular endothelial growth factor (VEGF). Gold nan…
The new neutron spectrometer time-of-flight enhanced diagnostics (TOFED) for the EAST tokamak is presented and its characteristics are described in terms of simulation results, as well as the interface in the torus hall along with new neutral beam (NB) injectors. The use of TOFED for studies of the slowing down of NB-…
Self-heating in gallium nitride based high frequency, high electron mobility power transistors (GaN HEMTs) is inspected using micro-Raman thermography and 800 picosecond transient thermoreflectance imaging. The two methods provide complementary temperature information inside the semiconductor and on top metal layers o…
Epicocconone is a natural latent fluorophore that is widely used in biotechnology because of its large Stokes shift and lack of fluorescence in its unconjugated state. However, the low photostability and quantum yields of epicocconone have limited its wider use, and in the absence of a total synthesis, this limitation…
We have studied the MnGe chiral magnet below ${T}_{\text{N}}=170$ K, by magnetic measurements, M\"ossbauer spectroscopy, and by neutron diffraction at ambient and under nonhydrostatic pressure. At ambient pressure, we observe the coexistence of two magnetic phases belonging to the same crystal phase in a large tempera…
This paper compares the relative merits of synchronous reluctance machine (SynRM) and permanent magnet assisted SynRM (PMA-SynRM), including ferrite-assisted SynRM, NdFeB-assisted SynRM and interior permanent magnet machine (IPM) for electric vehicle (EV) applications, in terms of electromagnetic performance and mater…
In order to investigate local structures of electrolytes in electrochemical reactions under the same scan rate as a typical value 100 mV/s in cyclic voltammetry (CV), we have developed an in operando observation system for electrochemical reactions by soft X-ray absorption spectroscopy (XAS) with a potential modulatio…
The ability of the rapid-capacitive discharge approach to access optimal viscosity ranges in metallic glasses for thermoplastic processing is explored. Using high-speed thermal imaging, the heating uniformity and stability against crystallization of Zr35Ti30Cu7.5Be27.5 metallic glass heated deeply into the supercooled…
We study grain-scale mechanical and geometrical features of partially crystallized packings of frictional spheres, produced experimentally by a vibrational protocol. By combining x-ray computed tomography, 3D image analysis, and discrete element method simulations, we have access to the 3D structure of internal forces…
Continuous hydrogenation of glucose to sorbitol was studied in an experimental set-up with parallel screening multiphase reactors.
The dielectric function of orthorhombic ${{\mathrm{Cu}}_{2}\mathrm{CdGeS}}_{4}$ and ${{\mathrm{Cu}}_{2}\mathrm{CdSiS}}_{4}$ single crystals (space group $Pmn{2}_{1}$) is measured experimentally in the spectral range of 0.7--5.2 eV, and the results are interpreted via comparison with ab initio calculations. Polarized R…
ABSTRACT This article demonstrates the successful fabrication of thin‐film‐composite (TFC) membranes containing well‐defined soft‐hard‐soft triblock copolymers. Based on “hard” polyimide (PI) and “soft” polydimethylsiloxane (PDMS), these triblock copolymers (PDMS‐b‐PI‐b‐PDMS), were prepared via condensation polymeriza…
Thermal effects in transparent laser crystals and ceramics are generally an unwanted consequence of the pumping process: temperature gradients give rise to an unevenly distributed refractive index variation and a distortion of the optical surfaces crossed by the laser beam (thermal lens); birefringence due to thermome…
Abstract To overcome the well‐known carbon electrodes surface fouling of phenols, we report on a simple and rapid method for the preparation of a disposable porous Cu‐modified graphite pencil electrode (Cu‐GPE) for sensing 4‐nitrophenol (4‐NP). The bare‐ and Cu‐modified graphite pencil electrodes were characterized by…
High speed motors that develop rotational speeds in excess of 5000 rpm are necessary for centrifugal and screw compressors, blowers, grinding machines, mixers, pumps, machine tools, textile machines, drills, handpieces, aerospace, flywheel energy storages, etc. The actual trend in high speed electromechanical drives t…
The plastic anisotropy of AA3103 sheets in the cold-rolled condition (H18 temper) and in the fully annealed condition (O temper) was studied experimentally and numerically in this work. The microstructure and texture of the two materials were characterized and the anisotropic plastic behaviour was measured by in-plane…
Previously unknown ladder-type heteroacenes were synthesized in just two steps from aromatic amines, 2-nitrobenzaldehydes, and biacetyl. A recently discovered multicomponent process affording 1,4-dihydropyrrolo[3,2-b]pyrroles was followed by the Cadogan reaction, which resulted in simultaneous closure of two additiona…
Charge equalization of series connected energy storage elements (batteries and super-capacitors) has significant ramifications on their life and also reduces their operational hazards. This paper reviews the current status and art of power electronics converter topologies employed for charge equalization of Li-ion bat…
Electrical machines have been widely used for many applications, ranging from electric and hybrid electric vehicles, renewable energy including wind power generators, more electric aircrafts, industrial drives, automations, to domestic appliances etc. This paper overviews the recent developments in innovative electric…