Materials Literature
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The role of interphase adhesion in the organoclay plate surface-polymer matrix system is shown to be crucial for the degree of dispersion of silicate plates. Quantitative methods for assessing the major structural characteristics of organoclay are discussed. The proposed interpretation of an organoclay packet (tactoid…
Trifluoroacetic anhydride (TFAA) and asymmetric telechelic α-hydroxyl-ω-(carboxyl acid) poly(ϵ-caprolactone) (HA-PCL) were used to obtain in situ α-trifluoroacetate-ω-trifluoroacetanhydride poly(ϵ-caprolactone) (TF-PCL). After reaction, the polymer was characterized by 1H and 13C NMR, MALDI-TOF, FT-IR, DSC, and TGA. U…
The pore structure of Cr2O3/Al2O3 catalysts and the surface chemical properties of these pores were characterized by positron lifetime and coincidence Doppler broadening (CDB) measurements. Four lifetime components could be resolved from the positron lifetime spectrum, with two long lifetime components and two short l…
One-component systems with the simplest pair model interparticle interaction potentials are considered. The equations of state are obtained, and the relationship between the critical parameters of each system and the parameters of the interaction potentials is established. The lines of the phase equilibrium are constr…
Complexes with antimony-containing anions, [Ph3MeP] + 2 [SbI5]2− (I), [Ph3MeP] + 2 [Sb3I12]3− (II), [Ph3MeP] + 3 [Sb3I12]3− · Me2C=O (III), and [Ph3MeP] + 3 [Sb2I9]3− (IV), were synthesized by reacting triphenylmethylphosphonium iodide with antimony iodide. The central atom in the cations of the complexes has a distor…
Deuterium permeation during ion bombardment through tungsten membranes coated by amorphous carbon films was investigated and compared with the permeation through bare tungsten. The membrane was bombarded by D3+ ions with energies of 200 and 1200 eV/D at a temperature of 873 K. The thickness of the amorphous carbon fil…
Solubilities for the system of MgCl 2 -MgSO 4 -MgB 4 O 7 -H 2 O at 298.15 K were calculated by using Pitzer and its extended HW model. The values of the parameters were derived from either literature or through fitting with the solubility data of the relative ternary system in literature. A comparison with the experim…
The spontaneous emission (SE) of light sources can be modified externally by surrounding local density of optical states. Here, the SE of single colloidal CdSe/ZnS quantum dots (QDs) coupled to dielectric disks with sub-micrometer sizes was investigated. Using single-QD measurement, the radiative decay rates can be ex…
The controllable annealing of amorphous Ti 2 NiCu ribbons by a pulsed electric current was developed, and samples with different fractions of crystalline phase were obtained. The samples’ structure was studied using high-resolution electron microscopy. Annealing conditions allowing us to obtain an amorphous nanocrysta…
1,3-Propanediol (1,3-PDO) has received increasing attention due to usage as the monomer of biopolymer-polytrimethylene terephthalate (PTT) which can be produced from bioresources. For the economic production of 1,3-PDO, the deveolpment of cost effective removal process of by-products such as carboxylic acids from its…
Graphene-the wonder material has attracted a great deal of attention from varied fields of condensed matter physics, materials science and chemistry in recent times. Its 2D atomic layer structure and unique electronic band structure makes it attractive for many applications. Its high carrier mobility, high electrical…
Understanding the mechanical interactions between implants and the surrounding tissue is known to have an important role for improving the bio-compatibility of such devices. Using a recently developed model, a particular micro-machined neural implant design aiming the reduction of insertion forces dependence on the in…
Achieving high capacitance densities with capacitors integrated in thin film form has been a major challenge for the past few decades. Nanocapacitors utilizing nanostructured electrodes and conformal nanodielectrics provide unique opportunities to enhance capacitance volumetric efficiency by 5-10X compared to the stat…
In this work, the critical twist angles of two types of CNTs, zigzag and armchair of different lengths are determined using molecular and structural mechanics. The results show that the torsional buckling modes predicted by the two methods are the same. It is also shown that critical twist angle decreases as CNTs leng…
Cultures of six benthic diatoms were maintained in the dark to measure their viability and biochemical composition after 8 wk of storage at low temperature (4 C) in darkness by refrigeration. Cell density, growth rate, and viability for each benthic diatom changed significantly after storage. Significant differences w…
A direct-write nanofabrication technique was applied to fabricate high aspect ratio Pt needle electrodes for site specific electrochemistry and electrophysiology. Non-passivated and passivated (with a 10 nm thin insulating film) Pt needles having uniform radii as small as 100 nm and lengths over 30 μm were deposited o…
This review covers recent research on extractive rectification by means of sulfolane to isolate and purify organic components.
Lake Orta, a large Italian subalpine lake, has a long history of industrial pollution by acid, ammonia, and metals. A whole-lake liming treatment in 1989-1990 led to a gradual increase in pH (from 4.4 to 7) and a concomitant decline in ammonia (from 2.5 to 0.05 mg L-1) and metal concentrations (e.g., copper: from 35 t…
Aggregation problem limits the use of silver nanoparticles (nano-Ag). Liquid chemical reduction method was used to fabricate silver/hydroxyapatite nanoparticles (nano-Ag/HA) by depositing nano-Ag on the surface of hydroxyapatite nanoparticles (nano-HA). The XRD result shows nano-Ag/HA is a hybrid composite of hydroxya…
In this research, we aimed to develop a new type of core-shell electrospun fiber, possessing “short” length (core) and “concentrated” polymer brush (shell). We prepared electrospun fibers with initiating moiety for surface-initiated atom transfer radical polymerization (SI-ATRP), one of living radical polymerizations.…