Materials Literature
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Wurtzite ZnS and ZnO porous nanostructures have been obtained by annealing ZnS(en) 0.5 nanosheets in air at different times and temperatures. The evolution of the morphological and structural transformation has been investigated at the nanoscale by transmission and scanning electron microscopy (TEM and SEM) analysis.…
Abstract A series of di‐ and triblock copolymers [poly( L ‐lactide‐ b ‐ε‐caprolactone), poly( D,L ‐lactide‐ b ‐ε‐caprolactone), poly(ε‐caprolactone‐ b ‐ L ‐lactide), and poly(ε‐caprolactone‐ b ‐ L ‐lactide‐ b ‐ε‐caprolactone)] have been synthesized successfully by sequential ring‐opening polymerization of ε‐caprolacto…
The synthesis and characterization of four dendron-containing tetraphenylethylenes (TPEs), 1(1)-1(4), were synthesized, along with a TPE compound that contained four OCH(2) Ph groups (referred to as 1(0)) for comparison. Photophysical studies revealed that the TPE core became emissive after linking dendrons onto its p…
The structural data on compounds which crystallize with the (cubic) pyrochlore structure have been analyzed to obtain a model equation that predicts their lattice constants. The model, which is based on the ionic radii and the electronegativities of the constituting ions, is applied to simple ternary and to more compl…
Modulation of the fluorescence lifetime (FLT) of CdTeSe/ZnS quantum dots (QDs) by near-IR (NIR) organic chromophores represents a new strategy for generating reproducible pH-sensing nanomaterials. The hybrid construct transfers the pH sensitivity of photolabile NIR cyanine dyes to highly emissive and long-lifetime pH-…
Abstract The cumulant expansion gives rise to an useful decomposition of the two‐matrix in which the pair correlated matrix (cumulant) is disconnected from the antisymmetric product of the one‐matrices. The cumulant can be approximated in terms of two matrices, Δ and Π , which are explicit functions of the occupation…
In this work, we present a detailed population balance model for Ostwald ripening. The model is based on a size-dependent growth rate expression incorporating the Gibbs–Thomson relationship between particle size and solubility, and is solved numerically. The effect of parameters such as average initial particle size,…
A range of complementary techniques was used to explore the physical mechanisms of Ag doping in ZnO nanowires obtained by a low-temperature electrochemical process. Cyclic voltammetry analysis was employed to demonstrate the ability of Ag to modify the electrochemistry and in turn the ZnO growth environment generating…
Here we show that floating objects in stratified fluids can be cloaked against broadband incident waves by properly architecting the bottom corrugations. The presented invisibility cloaking of gravity waves is achieved utilizing a nonlinear resonance concept that occurs between surface and internal waves mediated by t…
A gelator that consisted of one benzimidazole moiety and four amide units was used as a chemosensor. We found that its absorption and emission spectra in solution were sensitive to two complementary chemical stimuli: protons and anions. Thus, YES and INH logic gates were obtained when absorbance was defined as an outp…
Abstract Preferred crystallographic orientation (texture) in thin films of technologically important materials frequently has a strong effect on the properties of these films and is important for stable surface properties. The deposition of organized molecular films of a poly‐perfluorodecylacrylate, poly‐(1 H ,1 H ,2…
By modifying a synthetic procedure, two new hyperbranched polytriazoles (HP1 and HP2) containing isolation chromophores were synthesized successfully through click chemistry reactions under copper(I) catalysis. For the first time, these two polymers were derived from an AB(4)-type monomer, although they contain differ…
In this study, multi‐phase borosilicate‐based glass‐ceramics were investigated as an alternative waste form for immobilizing non‐fissionable products from used nuclear fuel. Currently, borosilicate glass is the waste form selected for immobilization of this waste stream, however, the low thermal stability and solubili…
We study the electrical properties of Pt/LaAlO${}_{3}$/SrTiO${}_{3}$ capacitors under the action of an external bias potential, using first-principles simulations performed at constrained electric displacement field. A complete set of band diagrams, together with the relevant electrical characteristics (capacitance an…
Abstract A single carbon nanotube has many similarities with an individual polymer chain including the fact that the end‐to‐end length of both are often about the same and the diameter of the chain is about the same (for single‐walled nanotubes) or only ∼10 to 20 times larger (for multiwalled nanotubes). The combinati…
The compound ${\mathrm{BaMn}}_{2}{\mathrm{As}}_{2}$ with the tetragonal ${\mathrm{ThCr}}_{2}{\mathrm{Si}}_{2}$ structure is a local-moment antiferromagnetic insulator with a N\'eel temperature ${T}_{\mathrm{N}}=625\text{ }\text{ }\mathrm{K}$ and a large ordered moment $\ensuremath{\mu}=3.9{\ensuremath{\mu}}_{\mathrm{B…
A rational approach to investigate the effect of molecular orientation on the intensity of chemical enhancement using graphene-enhanced Raman spectroscopy (GERS) is developed. A planar molecule, copper phthalocyanine (CuPc), is used as probe molecule. Annealing allows the CuPc molecule in a Langmuir-Blodgett film to c…
Impacts of individual slow highly charged ions on alkaline earth halide and alkali halide surfaces create nano-scale surface modifications. For different materials and impact energies a wide variety of topographic alterations have been observed, ranging from regularly shaped pits to nano-hillocks. We present experimen…
The antiferrodistortive (AFD) structural transitions of calcium titanate (CaTiO${}_{3}$) at ambient pressure have been extensively studied during the last few years. It has been found that none of the AFD polymorphs is polar or ferroelectric. However, it was recently shown theoretically and later experimentally confir…
Graphene is a promising candidate for optoelectronic applications such as photodetectors, terahertz imagers, and plasmonic devices. The origin of photoresponse in graphene junctions has been studied extensively and is attributed to either thermoelectric or photovoltaic effects. In addition, hot carrier transport and c…