Materials Literature
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A conceptually new approach has been developed for the fabrication of MnO2-multiwalled carbon nanotube (MWCNT) composites for electrodes of electrochemical supercapacitors (ES). Benzyldimethylhexadecylammonium chloride (BAC) surfactant and caffeic acid (CA) selectively adsorbed on MWCNT and MnO2, respectively, and all…
Measurements at nanopolycrystal grain sizes of the Hall–Petch plastic flow stress dependence on the reciprocal square root of polycrystal grain diameter occasionally fall short of expectations. The present report reviews experimental and theoretical aspects of such behaviours for a number of metal systems. Comparison…
The inorganic phase-change photoresist Ge2Sb1.5Bi0.5Te5 has a lot of advantages such as the two-sides of the photoresist, a large difference in the etching rate between it and Si, and so on, making it a promising candidate for use in the full-vacuum manufacture of the next generation ultra-large scale integrated circu…
An efficient synthesis route is proposed to obtain single phase powder ceramic of CaFe5O7. This complex structure can be described as an intergrowth between one CaFe2O4 unit and n = 3 slices of FeO Wüstite-type structure. A detailed structural study has been carried out at room temperature combining transmission elect…
We present a theoretical model for electrolytically top-gated graphene, in which we analyze the effects of dielectric saturation of water due to possibly strong electric fields near the surface of a highly charged graphene, as well as the steric effects due to the finite size of salt ions in an aqueous electrolyte. By…
The ferrite content and grain size in a Fe20Cr9Ni (wt-%) cast austenite stainless steel which has been widely used in primary coolant pipes of nuclear power plants were found to vary due to non-uniform solidification of the large pipe with a thickness of 95 mm. The pitting corrosion of Fe20Cr9Ni cast austenite stainle…
Severe plastic deformation (SPD) is a common method to fabricate nano-grained metals. However for Zr, a structural metal for nuclear applications, obtaining a nanoscale grain structure via SPD has been problematic due to deformation twinning and phase transformations. Here, nanostructured hcp Zr is fabricated through…
Multifunctional nanocables were prepared by directly welding superparamagnetic Fe3O4 nanoparticle decorated CNTs and Au nanoparticles together with polydopamine (Pdop) as “glue” in a facile but effective way. Additionally, the size and density of the Au nanoparticles can be easily controlled by different chemical appr…
We take advantage of the site-selective nature of the ^{75}As and ^{63}Cu NMR techniques to probe the Cu substitution effects on the local magnetic properties of the FeAs planes in Ba(Fe_{1-x}Cu_{x})_{2}As_{2}. We show that the suppression of antiferromagnetic Fe spin fluctuations induced by Cu substitution is weaker…
Elastic properties and acoustic dissipation associated with the disorder–order ferroelectric transition in a single crystal metal–organic framework (MOF), [NH 4 ][Zn(HCOO) 3 ], have been investigated using resonant ultrasound spectroscopy (RUS) in the temperature range between 10 K and 300 K.
Reactions of diethylzinc with TEMPO were investigated. Dropwise addition of 1 equiv of TEMPO to Et 2 Zn at −10 °C leads to the nitroxide complex EtZn(TEMPO) in high yield, whereas upon addition of 2 equiv of TEMPO the corresponding homoleptic nitroxide compound Zn(TEMPO) 2 is formed. Diffusion ordered NMR spectroscopy…
Unintentionally formed nanocrystalline graphene (nc-G) can act as a useful seed for the large-area synthesis of a hexagonal boron nitride (h-BN) thin film with an atomically flat surface that is comparable to that of exfoliated single-crystal h-BN. A wafer-scale dielectric h-BN thin film was successfully synthesized o…
Structure and photocatalytic activity of high quality graphene covered SiC powder (GCSP) composites as metal-free photocatalysts with different sizes and graphene layer numbers are investigated. The results indicate that the GCSP covered with 4–9 layers of graphene reveal outstanding photocatalytic activity enhancemen…
On the heels of metamaterial absorbers (MAs) which produce near perfect electromagnetic (EM) absorption and emission, we propose a universal electromagnetic energy conversion adapter (UEECA) based on MA. By choosing the appropriate energy converting sensors, the UEECA is able to achieve near 100% signal transfer ratio…
One of the biggest disadvantages of wood, as a potential reinforcement for thermoplastics, is its hydrophilicity. The aim of this study was to evaluate the effect of chemical modification of wood flour on mechanical, thermal, and fire properties of filled high-density polyethylene composites. For this purpose, aspen f…
For environmental conservation, post-consumer polyethylene terephthalate (PET) bottles are recycled using methods ranging from mechanical recycling to various chemical recycling processes. In this study, the characterization of recycled PETs and PET–nylon6 blend knitted fabrics, and virgin PET knitted fabric, was carr…
We report a meticulous study of the ac-magnetization dynamics (χac(T)), relative dielectric permittivity εr(T), and magneto-dielectric (Δεr/εr(H)) response of various complex magnetic transitions that occur below the ferrimagnetic Néel temperature TN of Mn3O4. Besides the known sequence of transitions at TN ∼ 42.75 K,…
Recently, one interesting wetting phenomenon was found whereby a live frog can stably stand or easily jump on a floating lotus surface. Inspired by the floating leaf, constructing a lotus-like substrate is important to provide powerful aquatic support. In this article, a flexible and light-weight superhydrophobic pape…
PURPOSE: Cationic agents have been reported to possess anti-neoplastic properties against various cancer cell types. However, their complexes with lipids appear to interact differently with different cancer cells. The purpose of this study was to (i) design and generate novel cationic lecithin nanoparticles, (ii) asse…
Abstract Es gibt ein großes Interesse an der Erforschung von Lanthanoid‐dotierten aufkonvertierenden Nanopartikeln aufgrund ihrer optischen Eigenschaften und ihrem breitgefächerten Anwendungspotential von der biologischen Bildgebung bis hin zur photodynamischen Therapie. Trotz der beachtlichen Fortschritte, die im let…