Materials Literature
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In this paper, a new design of multiband metamaterial (MTM) to be employed in novel electromagnetic components and devices is presented both numerically and experimentally. The structure is designed based on the concentric multiple open-ring architecture in which each ring provides a magnetic resonance at different fr…
Quantum dots have the potential to be used in solid state white lighting applications as an additional down-converting component to better represent wavelengths in the red spectral region, leading to higher quality white light with improved color rendering. In this contribution, we report on color characteristics of p…
Systematic series of binary zinc tellurite glasses in the form (ZnO)x(TeO2) (where x=0 to 0.4 with an interval of 0.05 mole fraction) have been successfully prepared via conventional melt cast-quenching technique. Their density was determined by Archimedes method with acetone as buoyant liquid. The thermal expansion c…
Surface enhanced Raman scattering (SERS) is rapidly emerging as a sensitive transduction platform for the trace detection of chemical and biological analytes. A critical challenge that needs to be addressed to propel this technique into real world applications is the poor chemical selectivity of the existing SERS subs…
Nanoporous carbons with ordered mesopores were synthesized by the hydrothermal treatment of environmentally friendly carbohydrate precursor and Pluronic F127 as the soft template. The pore texture, pore size distribution and specific surface area of the nanoporous carbons were found to be very sensitive to the hydroth…
Self-organized TiO2nanotubes (TNTs) with average inner diameter of 109 nm, wall thickness of 15 nm, and tube length of 7–10 μm were loaded with nickel oxide (NiO) nanoparticles via incipient wet impregnation method. The molar concentration of Ni(NO3)2·6H2O aqueous solution varied in a range of 0.5 M–2.5 M. The samples…
Synthesis, properties, and applications of ultrasmall particles (USPs, size/diameter <10 nm), so-called “ultrasmall nanoparticles”, are reviewed. USPs mainly consist of nanoparticles (with or without functionalization) of metallic gold, as well as iron and gadolinium oxides, all of which have important biomedical appl…
In the present work, we show the synthesis and full characterization of 12 new 1,3,4-oxadiazole non-symmetrical star-shaped molecules containing amide or imine connecting groups, variable number and positions of linear or branched alkoxy chains and different sizes of the aromatic core. Thermal and liquid crystalline p…
A resorufin–dinitrophenyl ether conjugate (1) shows emission enhancement for aromatic thiols in aqueous media with a neutral–basic pH, while being nonemissive for aliphatic thiols. This is achieved by two electrophilic sites with different local softness on compound 1; the respective sites selectively react with aroma…
In this work, a fast, sensitive and convenient method for the on-site separation, identification and determination of organophosphate pesticide methidathion in tea leaves was reported, by the use of thin layer chromatography (TLC) in combination with surface-enhanced Raman spectroscopy (SERS). Five different organopho…
Mass pure sandwich-like (hcp- and fcc-) Co/GE (graphene)/Co nanocomposites have been synthesized by direct ball-milling of Co and GE powders by adjusting the reaction conditions, and the maximum hydrogen storage capacity achieved was 899.5 mA h g−1 (3.29 wt% hydrogen).
We use a front-tracking method to simulate solidification with volume change of a droplet on a fixed cooling plate. The problem includes temporal evolution of three interfaces, i.e., solid–liquid, solid–air, and liquid–air, that are explicitly tracked under the assumption of axisymmetry. The solid–liquid interface is…
The structure and bonding of the gold-subhalide compounds Au144Cl60([z]) are related to those of the ubiquitous thiolated gold clusters, or Faradaurates, by iso-electronic substitution of thiolate by chloride. Exact I-symmetry holds for the [z] = [2+,4+] charge-states, in accordance with new electrospray mass spectrom…
Hybrid nanosystems composed of glycogen biopolymers and gold nanoparticles were prepared by an in situ non-toxic synthetic procedure. Transmission electron microscopy (TEM) and various spectroscopic methods (optical absorption, X-ray photoelectron and photoluminescence spectroscopy) were used for the characterization…
ZnO nanostructures with Ga doping prepared by metal–organic chemical vapor deposition developed an interesting nanopagoda shape with exposed {111}, {112}, {201}, and {101} lateral planes instead of {100} and {110} in the usually observed ZnO nanorods or nanowires. The types of exposed planes strongly affect those prop…
In this study, amorphous hydrogenated carbon (a-C:H) and Si-doped diamond-like carbon (Si-DLC) films were prepared using microwave sheath voltage combination plasma (MVP) deposition. The thermal stability of the a-C:H and Si-DLC films were investigated by performing an annealing test (100-700°C) in ambient air. Furthe…
Surface‐enhanced Raman scattering (SERS) has attracted great attention due to its remarkable enhancement and excellent selectivity in the detection of various molecules. Noble metal nanomaterials have usually been employed for producing substrates that can be used in SERS because of their unique local plasma resonance…
pure ZnO and Cu - doped ZnO nanopowders (1, 2, 3, 4 and 5 wt% Cu) were synthesized by co- precipitation method without further post-heat treatment. The as-synthesized powders were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and Raman spectroscopy. The XRD results represented as-synthes…
A series of 5,5′′′-diphenyl tetrathiophenes with polar glycerol groups at each end and two lateral flexible chains self-assemble into a series of liquid-crystalline honeycombs, formed by the π-conjugated rods which enclose polygonal prismatic cells filled by the lateral chains. With increasing chain length a discontin…
Highly substituted (degree of substitution, DS about 0.9) carboxymethyl starch (CMS) was prepared in isopropanol/water suspension. The influence of etherification reaction parameters on DS, reaction efficiency, number average molar mass as well as the viscosity of 2 wt. % aqueous solution was determined. Using laser s…