Materials Literature
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The interaction of urea and several naturally occurring protein-stabilizing osmolytes, glycerol, sorbitol, glycine betaine, trimethylamine oxide (TMAO), and proline, with condensed arrays of a hydrophobically modified polysaccharide, hydroxypropylcellulose (HPC), has been inferred from the effect of these solutes on t…
The solubilities of hesperetin in methanol, ethanol, 1-butanol, acetone, and water were measured over the temperature range of (288.2 to 323.2) K. The solubilities of hesperetin in selected solvents increased with an increase of temperature. The experimental solubilities were fitted with the modified Apelblat equation.
In relation to the recently intensified search for new superconducting systems, it is interesting to study the properties of metal nanoclusters containing ≈102–103 free carriers. It is essential that the spectra of delocalized electrons in many clusters form energy shells similar to those in atoms and nuclei. The supe…
In this paper we show that self-organization of colloidal PbSe and CdSe semiconductor nanocrystals with a size ratio of 0.57 leads to binary structures with a AB2 or a cuboctahedral AB13 lattice. The type of superlattice formed can be regulated by the relative concentration of both nanocrystals in the suspension.
Abstract Pt/TiO2 showed high selectivity toward NH3 formation in the conversion of NO and CO in the presence of H2O, higher than that observed for the reaction of NO with H2.
Photoluminescence (PL) brightening is clearly observed through the direct morphology transition from isolated to thin bundled vertically- and individually freestanding single-walled carbon nanotubes (SWNTs). On the basis of the precise spectra analysis and equation-based estimation of the PL time trace, the origin of…
The results of studies of weak spin–spin exchange interactions in binuclear copper(II) complexes with hydrazones based on saturated dicarbohydrazides in which the coordination polyhedra are connected by polymethylene spacers are generalised and systematically described.
The ability to generate small-scale structures and assemble functional substances in the fields of micro electronics and optoelectronics continues to support advances in information technology. Here we present a novel type of “layer-by-layer” assembled films, whose surface properties can be controlled by UV irradiatio…
Tenacissimoside A (1) and 11alpha-O-benzoyl-12beta- O-acetyltenacigenin B (2), two derivatives of tenacigenin B (3) from the plant Marsdenia tenacissima, reversed multidrug resistance in P-glycoprotein (Pgp)-overexpressing multidrug-resistant cancer cells. The sensitivity of HepG2/Dox cells to the antitumor drugs doxo…
Broad-band isothermal dielectric relaxation measurements of anhydrous sucrose were made at ambient pressure in its liquid and glassy states. We found a new secondary relaxation that is slower than the one commonly observed in sugars. Additionally, we carried out the dielectric measurements of the equimolar mixture of…
Bovine serum albumin (BSA) hollow microcapsules were fabricated through glutaraldehyde (GA) mediated covalent layer-by-layer assembly. The GA cross-linking of the adsorbed BSA on the colloidal particles enabled their surfaces to be covered by reactive aldehyde groups, which reacted with BSA molecules to result in anot…
We present the first time-resolved cryogenic observations of Forster energy transfer in large, monodisperse lead sulfide quantum dots with ground-state transitions near 1.5 microm (0.8 eV), in environments from 160 K to room temperature. The observed temperature-dependent dipole-dipole transfer rate occurs in the rang…
The well-known strong polyelectrolytes poly(diallyldimethylammonium) cation (PDADMA) and poly(4-styrenesulfonate) anion (PSS) form multilayers (PEMs) where formally the small counterions do not participate in any way. Previously, we have shown that by replacing the conventional chloride as the counteranion of PDADMA b…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTModification of Carbon Nanotubes: Water-Soluble Polymers Nanocrystal Wrapping to Periodic Patterning with Assistance of Supercritical CO2Fan Zhang, Hao Zhang, Zhiwei Zhang, Zhimin Chen, and Qun Xu*View Author Information College of Materials Science and Engineering, Zhengzhou U…
Heterodinuclear [(Ni (II)L)Ln (III)(hfac) 2(EtOH)] (H 3L = 1,1,1-tris[(salicylideneamino)methyl]ethane; Ln = Eu, Gd, Tb, and Dy; hfac = hexafluoroacetylacetonate) complexes ( 1.Ln) were prepared by treating [Ni(H 1.5L)]Cl 0.5 ( 1) with [Ln(hfac) 3(H 2O) 2] and triethylamine in ethanol (1:1:1). All 1.Ln complexes ( 1.E…
This work reports the synthesis and full characterization of 5,10,15-tris-pentafluorophenylcorrolato-iridium(III) bis-trimethylamine 1 and its octabromo derivative 2. The corrole is planar in both cases (the mean deviation from the plane is as low as 0.0371 A for 1 and 0.0325 A for 2), the UV-vis spectra display a spl…
An unconventional and straightforward route to fabricate morphology-controlled 2D ordered carbonaceous nanoarrays is presented. This route is based on the electron irradiation of a polystyrene colloidal monolayer followed by thermal decomposition. This strategy has the advantages of low-cost fabrication and easy manip…
The photoresponsive J-aggregation behaviors of a novel azobenzene-substituted zinc phthalocyanine (azo-ZnPc dyad) were studied by UV/vis, fluorescence, and (1)H NMR spectroscopy. Upon illumination with 365 nm UV light, the trans-cis isomerization of azobenzene can efficiently reduce the steric hindrance around the per…
The extracellular cell matrix (ECM) surrounds cells and plays important roles in many aspects of cellular fate, including cell migration, stem cell differentiation, and cancer progression. So far, there is no fluorescent dye to directly visualize the ECM network. Here we present a positively charged fluorescent core-s…
Difluoroboron dibenzoylmethane-polylactide, BF(2)dbmPLA, a biocompatible polymer-luminophore conjugate was fabricated as nanoparticles. Spherical particles <100 nm in size were generated via nanoprecipitation. Intense blue fluorescence, two-photon absorption, and long-lived room temperature phosphorescence (RTP) are r…