Materials Literature
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A new calix[4]azacrown is synthesized from 1,3-dipropynyloxycalix[4]arene in a good yield of 85% and was modified on a silicon surface via click chemistry to be a switchable wettability sensor for ion pairs ([C(4)mim]Cl). A cooperative mechanism involving supramolecular interactions is proposed.
The dynamics of a simple rigid pseudoglobular molecule (2-adamantanone) has been studied by means of dielectric spectroscopy and examined under the constraints imposed by the space group of the crystal structure determined by x-ray powder diffraction. The low-temperature monoclinic structure of 2-adamantanone, with on…
The effects of salt on emulsions containing sorbitan oleate (Span 80) and Laponite particles were investigated. Surprisingly, a novel double phase inversion was induced by simply changing the salt concentration. At fixed concentration of Laponite particles in the aqueous phase and surfactant in paraffin oil, emulsions…
AIM: This study investigates the capacity of a potent anti-inflammatory nanomedicine, celastrol, incorporated into poly(amidoamine) dendrimers, to inhibit endotoxin-mediated signaling in microglia. MATERIALS & METHODS: Celastrol was incorporated into amino (Cel/G4-NH(2)) and hydroxyl (Cel/G4-OH) terminus poly(amidoami…
In the present study, surface-enhanced Raman spectra of a bifunctional Raman reporter, 2-mercaptobenzimidazole, has been found to be responsive exclusively towards Cu(2+) ions while the reporter remains anchored on the Au nanoparticle surface. Thus a specific Cu(2+)-ion-detection protocol emerges. The simplicity, sens…
Growth conditions of InAs/GaAs QD layers determine such parameters as density, homogeneity and original size of QDs. The aim of the chapter is to elucidate the processes during QD capping by reflectance anisotropy spectroscopy (RAS) in situ measurements and to discuss the influence of the capping layer composition and…
Abstract Poly(ethylene‐co‐octene)/multiwall carbon nanotube (PEOc/MWNT) nanocomposites were prepared by a melt blending process. The MWNT's solubility and the transmission electron microscopy (TEM) observation indicated that the MWNT bonded well with a PEOc matrix. This facilitated the orientation of the MWNT when she…
Abstract In this work, nanocomposites of poly(hydroxybutyrate‐ co ‐hydroxyvalerate) PHBV and multiwalled carbon nanotubes (MWNT) were prepared by melt blending. Mechanical, thermal, morphological, and electrical properties of the prepared PHBV/MWNT nanocomposites were investigated. Differential scanning calorimetry (D…
Major advances in the field of carrier-mediated agents (CMAs) have revolutionized drug delivery capabilities over the past decade. While providing numerous advantages over their small-molecule counterparts (solubility,duration of exposure, and delivery to the site of action are higher), these agents display substantia…
Good-quality single crystals of the nonlinear optical (NLO) crystal l -histidinium-4-nitrophenolate 4-nitrophenol (LHPP) with a large size of 40 × 25 × 10 mm 3 have been grown by the slow cooling method. Its morphology has been indexed to reveal that the crystal is a rhombohedra with major forms of (−100) and (−101).…
Abstract Titanium powder is typically sintered in high vacuum to achieve high density and low oxygen. Sintered materials usually have coarse grain size or coarse lamellar structure if it is the Ti–6Al–4V alloy. A novel process—hydrogen sintering and phase transformation (HSPT)—for sintering Ti in hydrogen is studied i…
In this work, the well-known Frenkel-Mulder phase diagram of hard ellipsoids of revolution [D. Frenkel and B. M. Mulder, Mol. Phys. 55, 1171 (1985)] is revisited by means of replica exchange Monte Carlo simulations. The method provides good sampling of dense systems and so, solid phases can be accessed without the nee…
Hydrophilic alumina (Al 2 O 3 ) nanoparticles (25, 35, and 150 nm) are dispersed in different concentrations in solutions of a commercial hydrophobic poly(alkyl siloxane) (Silres BS‐290), and the suspensions are sprayed on glass surfaces. Static contact angles ( θ S ), measured on surfaces of siloxane‐nanoparticle com…
Abstract Chitosan is a biodegradable polymer composed of randomly distributed β‐(1,4)‐linked D ‐glucosamine (deacetylated unit) and N ‐acetyl‐ D ‐glucosamine (acetylated unit). It is produced commercially by deacetylation of chitin, which is the structural element in the exoskeleton of crustaceans (such as crabs and s…
Peroxo und Peroxid: Die Reaktion von [{WO(O2)2}2(μ-O)]2− mit 0.5 Äquivalenten HNO3 ergibt ein vierkerniges Peroxowolframat (1; siehe Bild), das eine drastisch erhöhte Aktivität in der Epoxidierung von Cyclooctenen mit H2O2 zeigt. Das Katalysesystem wurde auf die selektive Oxidation verschiedener Arten von Substraten m…
The relationship and trade-offs between the performance parameters including color rendering index (CRI), luminous efficacy of radiation (LER) and correlated color temperature (CCT) of white LEDs using quantum dot nanophosphors (QD-WLEDs) are investigated for CRI ≥ 80 and LER ≥ 300 lm/W at 1500 K ≤ CCT ≤ 6500 K. The o…
Acid assists: The reaction of [{WO(O2)2}2(μ-O)]2− with 0.5 equivalents of HNO3 gave a tetranuclear peroxotungstate (1; see picture) that has a dramatically enhanced activity for the epoxidation of cyclooctene with H2O2 compared to various peroxotungstates. The 1-catalyzed system was applicable to the selective oxidati…
The comparison of the structural and magnetic properties of molecular nanomagnets (MNM) and magnetic nanoparticles (MNP) can be instructive to get a deeper understanding of the magnetic behavior on the intermediate scale between molecular and bulk objects. In this respect iron oxo based clusters are particularly inter…
Two unusual entangled motifs of [Ag 0.52 Na 0.48 (β-Mo 8 O 26 )(H 2 O)][Ag 3 (Tipa) 2 ] ( 1 ) and [Ag 6 (Tipa) 4 (β-Mo 8 O 26 )][H 2 (β-Mo 8 O 26 )]·5H 2 O ( 2 ) based on a tri(4-imidazolylphenyl)amine (Tipa) ligand and octamolybdate clusters have been successfully synthesized at different pH values. In compound 1, th…
A DNA-encoding strategy is reported for the programmable regulation of the fluorescence properties of silver nanoclusters (AgNCs). By taking advantage of the DNA-encoding strategy, aqueous AgNCs were used as signal transducers to convert DNA inputs into fluorescence outputs for the construction of various DNA-based lo…