Materials Literature
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Crosslinked chitosan beads reported in the literature have the disadvantage of high water content and thus low mechanical strength. In this paper, a chitosan/poly(vinyl alcohol) (PVA) blend aqueous solution was first suspended in toluene–chlorobenzene to form droplets. Some of the water was then distilled out as an az…
Nematic cyanobiphenyl dimers have been found to exhibit a strong flexoelectric coupling, whose molecular origin is not obvious; we can explain such behaviour and clearly identify the role of different molecular features using a computational approach which combines a molecular level model and the elastic continuum the…
The requirements for a broadband antireflective structure in the THz spectral region are derived. Optimized structural parameters for a surface-relief grating adapted to the spectrum of an intended THz pulse are deduced. The effect of a structure fabricated into Topas((R)) by a single-point diamond-turning process is…
Here we designed and synthesized a new ligand, di(2-pyrazyl)amine (Hdpza) (1) and studied its coordination modes and the corresponding complexes with Cu(II), Co(II), Ni(II) and Cr(II). Hdpza is an analogue of the well-studied di(2-pyridyl)amine (Hdpa) ligand, which was used to generate the first extended metal atom ch…
Environment-friendly composites reinforced with bagasse fiber (BF), a kind of natural fiber as the remains from squeezed sugarcane, were fabricated by injection molding and press molding. As appropriate matrices for injection molding and press molding, polypropylene (PP) and polycaprolactone-cornstarch (PCL-C) were se…
A ferritic alloy interconnect was studied through solid oxide fuel cell (SOFC) stack operation at intermediate temperatures. Certain pretreatment of the alloy surface proved to be effective for controlling initial degradation of the stack performance, presumably by the formation of stable and conductive oxide scale. E…
A series of closely related tetrasubstituted derivatives of benzo[c]cinnoline (1), tetraazapyrene (2), phenanthrene (3), and pyrene (4) were investigated for their mesogenic properties using thermal, optical, spectroscopic, and powder XRD analyses. Only three 3,4-dioctyloxyphenyl derivatives exhibited mesogenic proper…
Previous studies have suggested that single-walled carbon nanotubes (SWCNTs) may pose a pulmonary hazard. We investigated the pulmonary toxicity of single-walled carbon nanohorns (SWCNHs), a relatively new carbon-based nanomaterial that is structurally similar to SWCNTs. Mice were exposed to 30 µg of surfactant-suspen…
Photoluminescence Optimization of Luminescent Nanocomposites Fabricated by Spray Pyrolysis of a Colloid-Solution Precursor, Wang, Wei-Ning, Widiyastuti, W., Wuled Lenggoro, I., Oh Kim, Tae, Okuyama, Kikuo
Using an alloy, the formation of porosity in anodic alumina films is examined in phosphoric acid and borax electrolytes. During growth of major pores in phosphoric acid electrolyte, the film develops two main layers with respect to the cation species: an outer layer of tungsten-free alumina, located next to the electr…
Homogeneous or periodical surface coating of multiwalled carbon nanotubes (MWNTs) can be achieved by in situ polymerization of ethylene as catalyzed directly from the nanotube surface- treated by a highly active metallocene-based complex, e.g., Cp*2ZrCl2/methylaluminoxane. This polyethylene (PE) coating allows for the…
The creation, understanding and control of mesoscopic chemical objects are at the core of many areas of chemistry and physics. Their preparation depends on a variety of nucleation and aggregation processes and they are exploitable for practical purposes, including fabrication techniques. At the opposite end, are cavit…
CdS/PMMA core/shell nanoparticles were synthesized using dispersion-mediated interfacial polymerization, and the transparent PMMA shell not only maintained the optical properties of CdS core but effectively protected the CdS core from environmental perturbation.
A novel and simple method for the determination of the contact angle of nano- and microparticles at the liquid/air interface is proposed. The principle is based on the consideration of differences between the pressure/area isotherms of a 2D single-component system of a surfactant and those of binary systems comprised…
MagSaki(A) software was developed for the magnetic analysis of dinuclear high-spin cobalt(II) complexes. This software performs magnetic analysis to determine magnetic parameters using five types of theoretical susceptibility equations. A characteristic feature of the software is that the exchange interaction can be t…
A combination of layer-by-layer (LBL) self-assembly and magnetic separation has been used to encode magnetic microspheres with multiple colours of photoluminescent semiconductor quantum dots (QDs). Magnetic separation increased the speed of the LBL process and led to high yields of encoded microspheres. This is import…
Surface-enhanced Raman scattering (SERS) is a powerful technique for the analysis of a variety of molecules and molecular structures. Due to its great complexity, the acquisition of detailed molecular information from biological organizations such as bacteria is still a challenging task. SERS can provide valuable info…
Single crystal CaS:Eu and SrS:Eu luminescent particles were synthesized via a solvothermal route at relatively low temperature . The as-obtained suspensions were strongly photoluminescent (PL), pointing at good Eu incorporation. The phosphors showed a broad PL emission band with an emission peak at 663 and for CaS:Eu…
The effects of La and/or Ti doping on crystallization, surface morphology, and electric properties of bismuth ferrite (BFO) films were investigated. All films consisted of single perovskite phase without a second phase. Ti-doping (BFT) does not have significant effects on leakage and polarization-electric field ( P-E…
This paper aims at developing a technique to calculate the reflection, absorption, and transmission of electromagnetic waves by a bounded plasma region.The model chosen for this study is a magnetized, steady-state, two-dimensional, nonuniform plasma slab, which is presented by a number of parallel flat layers.It is as…