Materials Literature
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The assembly of molecular architectures on the basis of molecular dipoles is proposed here to be a promising tool for construction of nanomaterials and nanodevices. Three kinds of building blocks having dipoles are discussed; helical peptides, cyclic beta-peptides, and oligo(phenylene ethynylene)s having donor and acc…
A place exchange reaction between 11-mercaptoundecanoic acids (MUA) and cetyltrimethylammonium bromide (CTAB)-protected gold nanorods (GNRs) was conducted inside an ionic exchange resin; this modification resulted in functional gold nanorods soluble in both polar and nonpolar organic solvents.
Self-assembling biomaterials are promising as cell-interactive matrices because they can be constructed in a modular fashion, which enables the independent and simultaneous tuning of several of their physicochemical and biological properties. Such modularity facilitates the optimization of multi-component matrices for…
This article summarizes the usage of high-temperature dilatometry in ceramic processing and powder technology with special attention on the description of the sintering process. A practical method for transformation of dilatometric shrinkage data into densification curves (the dependence of the sample density on sinte…
Pyrene-tetrathiafulvalenes reveal strong interactive forces with different types of carbon nanotube (CNT) samples—ranging from single-walled carbon nanotubes (SWNTs) to multi-walled carbon nanotubes (MWNTs). Notable, although subtle, are the differences that emerged while preparing, handling, and characterizing these…
This paper reports the formation of an organogel of an asymmetric bisphenazine through the growth of one-dimensional nanofibers via a coopertive interplay of pi-pi interaction, hydrogen bonding, and van der Waals interaction and the colorimetric acid sensing property of the nanofibers.
The straightforward synthesis of biodegradable star polymers via both in situ polymerization from a trifunctional RAFT agent and post-polymerization conjugation of pyridyldisulfide-ended linear polymers to a trithiol precursor is described.
A series of 1,3,5-benzenetrisamide derivatives with three hexaalkoxytriphenylene pendant groups were prepared, in which the triphenylene groups are connected to the central 1,3,5-benzenetrisamide core through a flexible spacer. The length of this spacer, as well as the size of the ortho-substituent at the triphenylene…
Effects of the differences in the curing agent and filler dispersion method on the dielectric properties were examined for epoxy/clay nanocomposites. Irrespective of the clay dispersion method, relative permittivity and electrical conductivity are higher in the samples cured with the amine. Moreover, negative heteroch…
Ordered mesoporous carbons have been applied, for the first time, as catalysts for hydrogen production via methane decomposition, showing higher and more stable activity than commercial carbonaceous catalysts.
The presence of the heterogeneous mesoporous Al-MCM-41 catalyst remarkably accelerated the cyanosilylation of various aldehydes and ketones with trialkylsilyl cyanide, giving the corresponding cyanohydrin silyl ethers in quantitative yields under mild reaction conditions.
We study the lasing dynamics of individual ZnO nanorods by time-resolved mu-photoluminescence. The distinct laser modes show gain competition and pronounced shifts as a function of excitation density. This behavior can be understood in terms of many-particle effects within an inverted electron-hole plasma and of the c…
The Ln-AV-20 structure is able to incorporate several different Ln3+ ions, which emit in different spectral regions, enabling the possibility of multi-colour capability. Using a study of the energy transfer dynamics in Gd1−(a+b)TbaEub-AV-20 materials, we show that the emission chromaticity of these systems may be fine…
In this paper we describe the results of a parameter survey of a 16 segmented Halbach cylinder in three dimensions in which the parameters internal radius, $r_{\mathrm{\scriptsize{in}}}$, external radius, $r_{\mathrm{\scriptsize{ex}}}$, and length, $L$, have been varied. Optimal values of $r_{\mathrm{\scriptsize{ex}}}…
Zinc oxide (ZnO) and Titanium oxide (TiO₂) are two chemical compound with very wide industrial and commercial applications, particularly as pigments. Due to their physical properties, both compounds are also used as sunscreen ingredients for protect from UV radiation. At the nano-scale, ZnO and TiO₂ have proven to hav…
The influence of a montmorillonite (MMT) nanoclay, functionalized with dimethyl-di(hydrogenated tallow) quaternary amine, on structural evolution and electrical characteristics of a designed polyethylene system has been studied. Samples were prepared by mixing a polyethylene/MMT masterbatch into a matrix system contai…
A general thermodynamic analysis of hydrogen production based on thermal water splitting processes is presented. Results of the analysis show that the overall efficiency of any thermal water splitting process operating between two temperature limits is proportional to the Carnot efficiency. Implications of thermodynam…
Controlling the growth of semiconducting nanowires with desired properties on a reproducible basis is of particular importance in realizing the next‐generation electronic and optoelectronic devices. Here, we investigate the growth of cupric oxide (CuO) nanowires by direct oxidation of copper‐containing substrates at 5…
We report current–voltage-luminance measurements on a series of organic light-emitting diodes (OLEDs) based on a Lumation Green 1300 Series (LG1300) light-emitting polymer (LEP) provided by the Sumitomo Chemical Company, Ltd. The devices used either indium tin oxide (ITO) or vapour-phase polymerised poly(3,4-ethylened…
IR spectroscopy is widely used to elucidate reaction mechanisms in NO(x) storage and reduction (NSR). Observed band positions and assignments of vibrational modes, however, differ remarkably among the various investigations. We report an IR study of barium species relevant in NSR, aiming to clarify the source of the r…