Materials Literature
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We recently demonstrated a phase compensated metalens that cannot only achieve super-resolution, but also possesses the Fourier transform capability. The metalens consists of a metamaterial slab and a plasmonic waveguide coupler (PWC). We have now ascertained the requirements for the metamaterial and the detailed desi…
Single-component silver and copper nanorods were synthesized by employing the electrochemical deposition of Ag and Cu materials into the pores of anodized aluminium oxide templates. Ni blocks that were predeposited into AAO nanochannels served as a sacrificial layer for detaching the synthesized Ag and Cu nanorods fro…
We have investigated the multi color density photochromism in reduced tridymite BaMgSiO4 (BMS-H) semiconductors, which can utilize green light, blue light, sunlight and ultraviolet light. It is found that BMS-H is one of visible light photochromic material with high response. BMS-H changes color from white to pink by…
Polymer adsorption by nanoparticles improves the stability of these types of suspensions against aggregation. In this work, the surface adsorption of polyethylene glycol (PEG) and polyvinyl alcohol (PVA) with different molecular weights onto the Zinc oxide (ZnO) nanoparticles is studied. The effects of solution pH val…
Three kinds of novel macrocylic calix[4]arene derivatives functionalized SBA-15 type of mesoporous hybrids (Calix-S15, Calix-NO(2)-S15 and Calix-NH(2)-S15) are synthesized by co-condensation of tetraethoxysilane (TEOS) and modified organic ligand (Calix-Si, Calix-NO(2)-Si and Calix-NH(2)-Si) in the presence of Pluroni…
An approach for the transverse oxidation of Au nanorods has been demonstrated by selectively capping the ends of the nanorods with Ag2O through a hydrothermal reaction. The tight Ag2O capping protects the ends of the nanorods and restricts oxidation to occurring only at the side surfaces. Such transverse oxidation lea…
Vertically aligned ZnO nanorod arrays were directly grown on flexible and transparent oxidized bi-layer graphene electrodes by seedless electrochemical deposition. Oxidized defects on the graphene surface induce epitaxial growth of highly dense single crystal ZnO nanorods. The diameter, length as well as morphology of…
A dual-stimuli-responsive surface with tunable wettability, switching between hydrophilicity and hydrophobicity, and responsivity to both temperature (T) and concentration of β-cyclodextrin (β-CD), is reported. Such surfaces are obtained by simply fabricating a poly(N-isopropyl acrylamide-co-adamantanyl acrylamide) P(…
Recently, machining has been exploited as a means for producing ultra-fine grained (UFG) and nanocrystalline microstructures for various metal materials, such as aluminum alloys, copper, stainless steel, titanium and nickel-based super alloys, etc. However, no predictive, analytical or numerical work has ever been pre…
Herein, we demonstrate that both qualitative molecular and quantitative elemental data obtained from size exclusion chromatography coupled online for the first time to both molecular fluorescence and elemental mass spectrometry, respectively, turned out to be critical to evaluate the quality of coatings of quantum dot…
Diamond-like Carbon (DLC) film has the ability to change the refractive index (n) value achieved high transmittance for potential applications of antireflection coating. The DLC films were coated onto D263T glass substrates at room temperature by radio frequency (RF) magnetron sputtering method. From the results of UV…
The 1H-Benzimidazolium Hydrogen L-Tartrate Dihydrate (BT) was synthesized using benzimidazole and L-tartaric acid and grown as single crystal by slow evaporation solution growth technique at room temperature (RT) using double-distilled water as a solvent. The crystal system has been confirmed from the single crystal X…
High-speed steel (HSS) tools are the most commonly used tools in small and medium-scale industry. So far, a few studies have been carried out pertaining to the life of HSS single point cutting tool. Studies on cryogenically treated (CT) cutting tools show microstructural changes in the material that can influence the…
We report on the synthesis and evaluation of a new class of low molar mass chiral metallomesogens containing cholesterol based N-(n-alkyl)salicylideneamines coordinated in a bidentate fashion that exhibit monotropic chiral nematic (N*) and smectic A* (SmA*) phases. Copper complex with a wide range of N* phase metallom…
The wetting behavior of spherical nanoparticles at a vapor-liquid interface is investigated by using density functional theory, and the line tension calculation method is modified by analyzing the total energy of the vapor-liquid-particle equilibrium. Compared with the direct measurement data from simulation, the resu…
Chelating amphiphiles with N, N′-ethylene diamine tetraacetic acid (EDTA) conjugated via an ester bond to one or two oleyl chain/s (EDTA-MO and EDTA-BO) have been found to be capable of chelating a variety of metal ions including paramagnetic metal ions such as Manganese (Mn) and Gadolinium (Gd). Thermal behavior and…
Supramolecular complexes consisting of anionic polyoxometalate (POM) and chiral, cationic lipids are newly developed. They give nanofibers, helical ribbons, and nanotapes in organic media depending on the chemical structure of lipid molecules. Lipid ammonium groups exert significant influence on their photoreduction c…
The use of natural fibers as reinforcement for thermoplastics has generated much interest due to the low cost, low density, high specific properties characteristics. In this work the mechanical properties of high density polyethylene/ textile fibers residues composites were studied. Effect of pretreatment with sulfuri…
A microscopic theory of the Raman scattering based on the local bond-polarizability model is presented and applied to the analysis of phonon confinement in porous silicon and porous germanium, as well as nanowire structures. Within the linear response approximation, the Raman shift intensity is calculated by means of…
The factors limiting the relaxivity (r) of MRI contrast agents based on small (∼2.0 nm) gold nanoparticles functionalised with paramagnetic chelates were explored using EPR spectroscopy. The EPR analysis suggested that nanoparticle-attached chelates exhibit relatively high tumbling rates which restrict their relaxivit…