Materials Literature
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The electrical conductivity of double-walled carbon nanotubes of the “armchair” type with the ABAB packing of layers is investigated theoretically. The temperature dependences of the longitudinal electrical conductivity σ( T ) for a number of double-walled carbon nanotubes, such as the (3, 3)@(8, 8), (5, 5)@(10, 10),…
α - Fe nanorods encapsulated in multiwall carbon nanotubes (CNTs) were characterized by x-ray diffraction (XRD), high resolution electron microscopy (HREM), and electron holography. HREM observations revealed that the α-Fe nanoparticles were single crystals with a preferential growth direction of ⟨200⟩α-Fe oriented al…
The use of holographic structures is promising for the realization of efficient systems in backlight applications for displays. By applying surface relief gratings on top of a side-lit lightguide we realize a backlight that avoids the use of color filters. The grating is used as a light outcoupling and color-separatin…
P-type Bi0.4Sb1.6Te3 thermoelectric materials were prepared by an angular extrusion technique with rapidly solidified and stacked foils in a temperature range from 643 K to 838 K. Textures of the angular-extruded specimens were observed by Orientation Imaging Microscopy (OIM). The average grain size was monotonously e…
We present here experiments dealing with the hydrodynamic characterization of high-porosity metallic foam, performed on copper foam. The experimental setup and the procedure used to obtain the hydrodynamic data are described. Analysis of these measurements is conducted using the parameter estimation method. Brazing fo…
In bulk films of a novel well-defined amphiphilic diblock liquid-crystalline copolymer with aramid moieties, a stable perpendicularly orientated hydrophilic nanocylinder array with hexagonal packing was formed in a large area by supramolecular self-assembly.
This paper is covering new, simplistic method of obtaining the system for controlled delivery of the ascorbic acid. Copolymer poly (D,L-lactide-co-glycolide) (DLPLG) nanoparticles are produced using physical method with solvent/nonsolvent systems where obtained solutions were centrifuged. The encapsulation of the asco…
Convertor transformer is the heart of HVDC power system network. The insulation of the transformer is stressed by AC and DC voltages. At the time of installation, AC and DC voltage tests are routine test to understand the withstand capability of the insulation structure for the rated voltage. The Acoustic Emission (AE…
Abstract As is well established in these reviews, CPN research is a complex subject that is both timely and developing rapidly. While the term “polymer-clay nanocomposite” is more conventional in the literature, the term CPN is employed in this volume in order to stress the importance of the clay science. The number o…
Space charge formation in low-density polyethylene film containing a small amount of MgO nanoparticles (LDPE/MgO nanocomposite film) subjected to a high electric field greater than 100 kV/mm has been studied using an improved pulsed electroacoustic (PEA) system. No marked space charge formation was observed in LDPE/Mg…
beta,meso,beta-Fused porphyrin oligomers have many attractive photophysical features such as strong absorption in the near-IR at wavelengths greater than 1000 nm, and high two-photon cross sections. However their ultrafast S(1)-S(0) deactivation (k(d) > 10(11) s(-1)) limits potential applications. We have synthesised…
The increased consumer demand for food products characterised by high quality and a long shelf-life has initiated the development of mildly preserved products that keep their natural and fresh appearance for the longest possible time. Edible coatings have been long used empirically for food protection and shelf-life p…
Electropolishing of tantalum in concentrated acids has recently been reported to result in highly ordered arrays of nanoscale dimples. In this paper we study in more detail the electrochemical conditions affecting the formation of regularly dimpled surfaces on tantalum. Solution aging and anodization potential were fo…
Recently, sulfated zirconia has received considerable attention as a potential solid acid catalyst to replace problematic homogeneous acid catalysts. In this paper, the preparation and properties of acid catalysts obtained by grafting ziconia with atomic precision on MCM-41 mesoporous silica were studied. TEM and pote…
A new dynamic drape automatic measuring system integrating Cusick’s drapemeter principle with the image analysis technique was devised to automatically measure the static and dynamic drape coefficients of fabrics. The relationship for four natural-fibre woven fabrics between the fabric drape coefficient and sixteen ph…
The plethora of drug therapies and types of drugs demand different formulations, fabrications conditions and release kinetics. No single polymer can satisfy all the requirements. Therefore there have been tremendous advances in area of biodegradable copolymers over the last 30 years. This article reviews current resea…
The authors studied the thermoelectric properties of LaPdBi and GdPdBi half-Heusler compounds. Polycrystalline samples were prepared by a spark plasma sintering (SPS) technique, and their thermoelectric properties were measured above room temperature. The electrical resistivities of both samples show a semiconductor l…
Vietnam is situated in the wet tropical zone; thus, atmospheric conditions are characterized by high temperatures and a long time of wetness (TOW). In addition, the salt air coming in from the sea causes a high chloride concentration in coastal areas. Furthermore, Vietnam is a developing country, which means that air…
The complexes Ln2L3·xH2O (L = 1,2-benzenedisulfonate; Ln = Sc (1), x = 14; Ln = Y (2), x = 16; Ln = La (3), x = 7; Ln = Ce (4), x = 6; Ln = Pr (5), x = 10; Ln = Nd (6), x = 18; Ln = Sm (7), x = 18.25; Ln = Eu (8), Gd (9), Tb (10), Ho (11), Yb (12), Lu (13), all x = 16) were synthesised by treating Ln2O3 with an aqueou…
The surface treatment of glass beads, chosen as model filler, with silane coupling agent with multilayer coverage was carried out. The treated beads were incorporated with poly(vinyl chloride), chosen as a typical ductile polymer. The effects of the organic functional group of silane and silane chain length on the mec…