Materials Literature
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In this study, four kinds of coupling agents (i.e., silane KH550, silane KH560, titanate NXT-102, titanate NXT-201), were used to modify the surfaces of aluminum (Al) particles. The effects of these coupling agents on the microstructures and dielectric properties of the Al/epoxy composites were investigated by the sca…
The decomposition of PET during thermal treatment of municipal waste results in the formation of sublimating substances such as terephthalic acid (TPA) and benzoic acid, causing blockage and corrosion of pipes in the treatment facilities. To prevent these effects, TPA can be decarboxylated in the presence of calcium o…
Abstract Two‐photon polymerization (2‐PP) is a promising new photolithographic technique to fabricate three‐dimensional (3D), micro‐ and nano‐structured tissue engineering scaffolds from photopolymerizable monomers. Although various photo resins are known for the use in 2‐PP, there is currently a need for photo‐curabl…
Infrared detectors require cryogenic operation to suppress dark current, which is typically limited by Auger processes in narrow-band-gap semiconductor materials. Device structures designed to reduce carrier density under nonequilibrium reverse-bias operation provide a means to suppress Auger generation and to reduce…
Isolated β-hairpins in water have a temperature dependence of their conformational stability qualitatively resembling that of globular proteins, showing both cold and hot unfolding transitions. It is shown that a molecular-level rationalization of this cold unfolding can be provided extending the approach devised for…
The present investigation deals with the synthesis of novel prodrugs of dexibuprofen with amino acids with an aim to achieve potent anti-inflammatory activity and less gastrointestinal toxicity. Structures of synthesized compounds were confirmed by spectral and elemental analyses. In vitro hydrolytic studies in simula…
BACKGROUND: Magnetic nanostructures and nanoparticles often show novel magnetic phenomena not known from the respective bulk materials. In the past, several methods to prepare such structures have been developed - ranging from wet chemistry-based to physical-based methods such as self-organization or cluster growth. T…
The mild and highly efficient thiol-ene click reaction has been used to construct a rotaxane incorporating dibenzo-24-crown-8 (DB24C8) and a dibenzylammonium-derived thread in high yield under the irradiation of UV light. A rotaxane containing a disulfide linkage in the macrocycle was also synthesized by the thiol-ene…
Hydrothermal synthesis has afforded a pair of dual-ligand divalent cadmium 4-methylphthalate (mph) two-dimensional (2-D) coordination polymers, wherein the length of the dipyridyl co-ligand plays a predominant role in the overall structural topology. [Cd 2 (mph) 2 (dpe) 4 ] n ( 1, dpe = 1,2-di(4-pyridyl)ethane) posses…
An efficient and metal-catalyst free method of glycopolymer synthesis via thiol/para-fluorine "click" reaction was used to graft acetylated 1-thio-β-D-glucopyranose and 1-thio-β-D-galactopyranose onto a homopolymer of pentafluorostyrene (PFS) as well as onto a block copolymer of styrene and PFS. Subsequent deprotectio…
The microstructure of a contact line formed by a liquid and its pure vapor on a perfectly wetted superheated smooth substrate, with the disjoining pressure most often in the form of a positive inverse cubic law (nonpolar case), is routinely considered to end up in a microfilm extended over adjacent "dry" parts of the…
INTRODUCTION: Reversible Addition Fragmentation Chain Transfer (RAFT) polymerisation is now an established tool for polymer chemists to create various polymer architectures with precise control over the molecular weight, and to install a variety of different moieties onto the polymer chain ends. Recently, there seems…
We compare high field magnetic circular dichroism, absorption, and photoluminescence spectra for Ir(ptz)${}_{3}$ with time-dependent density functional theory. By gradually turning on the relativistic effects we identify several distinct relativistic effects in the spectra of this complex. We show that relativistic ef…
Asymmetric perylene bisimide (PBI) dyes are prepared and are shown to be suitable for the preparation of fluorescence chemosensors for pH. They carry one amino-functional substituent which introduces pH sensitivity via photoinduced electron transfer (PET) while the other one increases solubility. The luminescence quan…
The catalytic conversion of adenosine triphosphate (ATP) and adenosine monophosphate (AMP) to adenosine diphosphate (ADP) by adenylate kinase (ADK) involves large amplitude, ligand induced domain motions, involving the opening and the closing of ATP binding domain (LID) and AMP binding domain (NMP) domains, during the…
Highly efficient down-conversion phosphors are demonstrated in a microcavity down-conversion white OLED. Using a down-conversion phosphors film, part of the blue light emitted from the microcavity blue OLED is converted to yellow and red light, resulting in white light emission. The photograph shows the image of a wor…
The effects of alkyl/alkoxy pendant chains on the electronic structure and properties of a typical poly(aryl-ethynylene) (PAE) system formed by phenylethynylene units and 1,3,4-thiadiazole rings are analyzed. Optical band gaps and electronic properties (electron affinity, LUMO energy and intramolecular reorganization…
In this study, aluminum (Al-6070)/alumina (Al 2 O 3 ) and Al-6070/graphite (Gr)-reinforced metal—matrix composites (MMCs) are fabricated by melt-stirring technique. The MMC bars and plates are prepared with varying the reinforced particles volume fraction ranging from 5% to 15%. The average reinforced particle sizes o…
A new incremental approach to the computation of vertical excitation energies is presented. The method works based on the definition of a dominant occupied orbital where the excitation takes place (natural transition orbital) and by localizing the remaining occupied space. The use of a reduced two-body expansion leads…
There have been many recent developments in compound semiconductor nanowire photovoltaic devices. Of these, advances in nanowire synthesis and performance enable nanowires to be implemented for efficient and low-cost solar-energy-harvesting devices. On the other hand, many challenges in device fabrication must be reso…