Materials Literature
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Polyelectrolyte multilayer films containing nanocrystalline cellulose (NCC) and poly(allylamine hydrochloride) (PAH) make up a new class of nanostructured composite with applications ranging from coatings to biomedical devices. Moreover, these materials are amenable to surface force studies using colloid-probe atomic…
A CO(2)-responsive dispersant, N,N-dimethyl-N'-(pyren-1-ylmethyl) acetimidamidinium (PyAH(+)), which bears both a pyrene moiety and an amidinium cation, has been successfully synthesized. Through strong π-π interaction between the pyrene moiety and single-walled carbon nanotubes (SWNTs), we have demonstrated that PyAH…
CdTe quantum dot (QD) clusters are synthesized in the presence of RNase A, which acts as a biomolecular templating agent under microwave irradiation. Red shifts of photoluminescence spectra of the denatured RNase A (dRNase A)-capping QD clusters (dRQDs) are detected during a fifty-day storage period at room temperatur…
Simulation methods have been used to investigate the energetics of defect formation, dopant solution, water incorporation, and defect clustering in the high-temperature proton conductor LaNbO 4 . The interatomic potential model successfully reproduces the observed tetragonal scheelite-type structure of LaNbO 4 . Forma…
Cr and Ce-doped Fe 2 O 3 catalysts are investigated for high temperature water gas shift (WGS) reaction. The chosen doping atomic ratios of Fe/metal for this investigation ranged from 10:0.2 to 10:2.5. Precipitation of Fe(III) nitrates with Cr- or Ce-metal nitrate(s) at different concentrations resulted in formation o…
The encapsulation of hydrophilic drug in polymeric nanoparticles with high loading remains a challenge due to the rapid penetration of the drug to the external aqueous phase. In order to improve the encapsulation efficiency of daunorubicin (DNR) in poly(D,L-lactic-co-glycolic acid (PLGA) and poly(D,L-lactic acid) (PDL…
Highly ordered arrays of Cu-rich and -deficient CuInSe(2) nanotubes as well as ZnO/CuInSe(2) core/sheath nanocables have been synthesized on glass substrates by using ZnO nanorod arrays as sacrificial templates via a low-cost solution method. Chemical conversions from hexagonal ZnO to cubic ZnSe, hexagonal CuSe and te…
Using small angle x-ray scattering, we find that the correlation length of bulk liquid water shows a steep increase as temperature decreases at subzero temperatures (supercooling) and that it can, similar to the thermodynamic response functions, be fitted to a power law. This indicates that the anomalous properties of…
A series of cryptands has been prepared and they demonstrate the relationship between oxidative stability of aqueous EuII and ligand properties (see figure). One of these EuII complexes is more stable than FeII in hemoglobin and appears to be the most oxidatively-stable aqueous EuII species known. The high stability o…
Antimony selenide is a promising thermoelectric material with a high Seebeck coefficient, but its figure of merit is limited by its low electrical conductivity. Here, we report a rapid and scalable (gram-a-minute) microwave synthesis of one-dimensional nanocrystals of sulfurized antimony selenide that exhibit 10(4)-10…
Ripe fruits: The fluorescence of a conjugated polymer is quenched by the presence of copper(I) moieties. Upon exposure to ethylene gas the copper complexes bind to ethylene and no longer quench the polymer fluorescence (see picture). This sensory concept can be used in solution and in thin films.
Repeated administration of chemotherapeutics is typically required for the effective treatment of highly aggressive tumors and often results in systemic toxicity. We have created a copper-doxorubicin complex within the core of liposomes and applied the resulting particle in multidose therapy. Copper and doxorubicin co…
Four inorganic−organic hybrids based on Keggin-type polyoxometalate (POM), [Ag 3 (bmte) 2 (PMo 12 O 40 )] ( 1 ), [Cu I 3 (bmte) 3 (PMo 12 O 40 )] ( 2 ), [Cu II (bmte) 3 (HPMo 12 O 40 )] ( 3 ), and [Ni(bmte) 3 (HPMo 12 O 40 )] ( 4 ) (bmte = 1,2-bis(1-methyl-5-mercapto-1,2,3,4-tetrazole)ethane), have been synthesized un…
Reactions of 2,6-(ArN═CH) 2 C 6 H 3 Li with AlEt 2 Cl afford a number of NCN pincer aluminum complexes (2,6-(ArN═CH) 2 C 6 H 3 )AlEt 2 (Ar = Ph ( 1 ), 2,6-Me 2 C 6 H 3 ( 2 ), 2,6-Et 2 C 6 H 3 ( 3 ), 2,6- i Pr 2 C 6 H 3 ( 4 )). Similar reactions of 2,6-(ArN═CH) 2 C 6 H 3 Li with ZnEtCl produce bisligated zinc complexes…
We report the shape-controlled synthesis of anisotropic Au nanostructures through TiO(2)-assisted photochemical reduction of HAuCl(4). By using this method, we have successfully synthesized the platelet-like Au nanorods and six-star Au nanoparticles. Importantly, the platelet Au nanorod exhibits the unique asymmetric…
BaYF 5 nanocrystals with a mean size of about 24 nm have been prepared via a facile hydrothermal method without the assistance of any surfactant for the first time. The structure investigation reveals that the as-synthesized BaYF 5 nanocrystals are cubic structures instead of the reported tetragonal structures found v…
We fabricated highly adherent and electrically conductive micropatterns on SU-8 by supersonic cluster beam deposition (SCBD). This technique is based on the acceleration of neutral metallic nanoparticles produced in the gas phase. The kinetic energy acquired by the nanoparticles allows implantation in a SU-8 layer, th…
Within the framework of time-dependent density functional theory combined with the Korringa-Kohn-Rostoker Green function formalism, we present a real space methodology to investigate dynamical magnetic excitations from first-principles. We set forth a scheme which enables one to deduce the correct effective Coulomb po…
We present measurements of $ab$-plane resistivity $ρ_{ab}(T)$ and superfluid density [$\propto λ^{-2}$, $λ$ = magnetic penetration depth] in $La_{2-x}Sr_{x}CuO_{4}$ films. As Sr concentration $x$ exceeds about 0.22, the superconducting transition sharpens dramatically, becoming as narrow as 200 mK near the super-to-no…
Titanium dioxide and zinc oxide nanomaterials, used as UV protecting agents in sunscreens, were investigated for their potential genotoxicity in in vitro and in vivo test systems. Since standard OECD test methods are designed for soluble materials and genotoxicity testing for nanomaterials is still under revision, a b…