Materials Literature
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Reaction between sodium hydroxide and zinc acetate leads to the formation of zinc hydroxide, Zn(OH) 2 . The as-prepared Zn(OH) 2 was then decomposed by using conventional heating process or with the aid of microwave irradiation. The nanoproducts of both methods were ZnO nanostructures of different size and shape, but…
The versatility of nanographene (NG) as an electron donor is demonstrated when integrated together with an electron accepting porphycene into a novel electron NG hybrid. This feature is further exploited in dye-sensitized solar cells (DSSCs), in which photoanodes (ZnO) reveal a cascade of electron flow as modus operan…
Polyvinyl alcohol–polypyrrole–multiwall carbon nanotube composite polymer films have been synthesized by a chemical oxidative polymerization technique. Dielectric properties have been measured in the frequency range from 20 Hz to 1 MHz and in the temperature range 77 ⩽ T ⩽ 300 K. Electric modulus vector analysis gives…
The corrosion of CoCrMo, an alloy frequently used in orthopedic implants, was studied with an electrochemical quartz crystal microbalance (QCM) in three physiologically relevant solutions. Mass changes were measured during potentiodynamic tests, showing material deposition in protein solutions at potential levels that…
A synthesis route to rock salt zinc oxide ( rs -ZnO), high-pressure phase metastable at ambient conditions, has been developed. High-purity bulk nanocrystalline rs -ZnO has been synthesized from wurtzite ( w ) ZnO nanopowders at 7.7 GPa and 770–820 K and, for the first time, recovered at normal conditions. Structure,…
Nanoislands of ??-FeRh were formed by the deposition of a 10?nm film onto (0?0?1)-MgO and observed by atomic force microscopy. This island-like architecture results in stabilized ferromagnetic (FM) ordering at low temperatures as noted by asymmetry in the x-ray diffraction peaks, a magnetostructural transition with a…
This paper reports high-accuracy Sellmeier and thermo-optic dispersion formulas for GaSe that provide excellent reproduction of the phase-matching conditions for second-, third-, and fourth- harmonic generation of CO2 laser radiation at 10.5910 μm in the 20°C-200°C range as well as the data points of Feng et al. [Opt.…
Plasmonic nanostructures can induce a number of interesting responses in devices. Here we show that hot electrons can be extracted from plasmonic particles and directed into a molecular electronic device, which represents a new mechanism of transfer from light to electronic transport. To isolate this phenomenon from a…
Multi-walled carbon nanotubes (MWCNTs) were grown on carbon fiber (CF) felt by chemical vapor deposition that resulted into strongly anchored carbon nanotubes (CNTs) on the CF surface. These multiscale preforms were used as the reinforcement in epoxy resin to develop multi scale CF felt-MWCNT/epoxy composites. The fle…
High-saturated red phosphors Mn4+-doped SrAl12O19 were prepared by solid-state reaction methods. The luminescent properties of SrAl12O19:Mn4+ were systematically investigated. The excitation spectra indicated that SrAl12O19:Mn4+ could be effectively excited by both NUV light and the blue light of LED chips. The emissi…
Featured by tunable localized surface plasmon resonance peaks in the near-infrared region and hollow interiors, Au nanocages represent a novel class of multifunctional nanomaterials that have gained considerable attention in recent years. This short review summarizes our recent work on the capabilities of Au nanocages…
Block copolymers with their rich phase behavior and ordering transitions have become a paradigm for the study of structured soft materials. A major challenge in the study of the phase behavior of block copolymers is to obtain different stable and metastable phases of the system. A strategy to discover complex ordered…
Shape memory polymers (SMPs) are a class of smart materials that can fix a temporary shape and recover to their permanent (original) shape in response to an environmental stimulus such as heat, electricity, or irradiation, among others. Most SMPs developed in the past can only demonstrate the so-called one-way shape m…
We present measurements of the superconducting critical temperature ${T}_{c}$ and upper critical field ${H}_{c2}$ as a function of pressure in the transition metal dichalcogenide 2$H$-NbS${}_{2}$ up to 20 GPa. We observe that ${T}_{c}$ increases smoothly from 6 K at ambient pressure to about $8.9$ K at 20 GPa. This ra…
Nanoporous materials play an important role in modern batteries as well as fuel cells. The materials microstructure needs to be analyzed as it determines the electrochemical properties. However, the microstructure is too fine to be resolved by microcomputed tomography. The method of choice to analyze the microstructur…
We theoretically discover that unique eigenmodes of skyrmion crystal (SkX) are not only magnetically active to an ac magnetic field (${\mathbit{H}}^{\ensuremath{\omega}}$) but also electrically active to an ac electric field (${\mathbit{E}}^{\ensuremath{\omega}}$) in a multiferroic chiral-lattice magnet Cu${}_{2}$OSeO…
We have studied the photoelectrochemical properties of both undoped and Si-doped GaN nanowire arrays in 1 mol l(-1) solutions of hydrogen bromide and potassium bromide, which were used separately as electrolytes. It is observed that variations of the photocurrent with bias voltage depend strongly on the n-type doping…
This work aimed at the characterisation of a nano-laminate coating produced by the layer-by-layer methodology and its evaluation on the preservation of ‘Coalho’ cheese. Initially, five alternate layers of alginate and lysozyme were assembled in an aminolysed/charged polyethylene terephthalate (A/C PET) and physically…
The tribological properties of Si 3 N 4 ball sliding against diamond‐like carbon (DLC) films were investigated using a ball‐on‐disc tribometer under dry friction and oil lubrications, respectively. The influence of nano boron nitride particle as lubricant additive in poly‐α‐olefin (PAO) oil on the tribological propert…
Single atoms, and in particular the least reactive noble gases, are difficult to immobilize at room temperature. Ion implantation into a crystal lattice has this capability, but the randomness of the involved processes does not permit much control over their distribution within the solid. Here we demonstrate that the…