Materials Literature
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Amphiphilic scorpion-like macromolecules (AScMs), that self-assemble as nanocarriers, were evaluated for intracellular delivery. To qualitatively examine the intracellular fate of AScMs in human umbilical vein endothelial cells (HUVECs), representative polymers (M 12 P 5 ) were labeled with a fluorescent dye, fluoresc…
Irradiation of 2-diazo-3-oxochlorins (200 W, lambda > or = 345 nm, 10 degrees C) in the presence of nucleophilic and biomimetic substrates 1-butanol, tosylhydrazine, or tetrahydrofurfuryl alcohol generates Wolff-rearranged, pyrrole ring-contracted azeteoporphyrinoids in 11-34% yield, with the corresponding hydroxyporp…
The synthesis of highly ordered monolayers of metallic nanoclusters by a buffer-layer assisted growth (BLAG) route is introduced and investigated. The focus is on clusters of Co deposited onto mechanically stable, periodically corrugated boron-nitride layers by repeated BLAG cycles. The approach combines the advantage…
In this paper, the dynamic assembly of toroidal micelle structures of amphiphilic triblock copolymers in dilute solution has been investigated using dissipative particle dynamics simulations. The amphiphilic molecule is represented by a coarse-grained model, which contains hydrophilic and hydrophobic particles. Some m…
OBJECT: The characteristics of polyethylene glycol-coated liposomal doxorubicin (PLD), the only liposomal drug now clinically available for intravenous injection, were investigated after convection-enhanced delivery (CED) into the rat brain parenchyma. METHODS: The distribution, tissue retention, and toxicity profile…
Nanocomposites consisting of one-dimensional CuI crystals inside single-walled carbon nanotubes were obtained using the capillary technique. high-resolution transmission electron microscopy investigations of the atomic structure of the encapsulated 1D CuI crystals revealed two types of 1D CuI crystals with growth dire…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTReduced Photobleaching of Conjugated Polymer Films through Small Molecule AdditivesTrisha L. Andrew and Timothy M. Swager*View Author Information Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenu…
Pure and porous: Several hundreds of square meters of enantiopure surface per gram of material were generated by introducing amino acids into periodically ordered mesoporous organosilica materials. The stereochemical nature of the surfaces was probed by measuring adsorption isotherms with chiral gases.
New rod−coil diblock and coil−rod−coil triblock copolymers containing conjugated poly[2,7-(9,9-dihexylfluorene)] (PF) and coil-like poly(2-vinylpyridine) (P2VP) were synthesized by combining coupling reaction and living anionic polymerization. Scanning force microscopy (SFM), transmission electron microscopy (TEM), cr…
A recently constructed model for low-lying excitations in bilayer graphene exhibits midgap, zero-energy modes in its Dirac-type spectrum when a scalar order parameter takes a vortex profile. We show that these modes persist when the dynamics is extended by a gauge field interaction, which also renders finite the vorte…
The single crystals of the NLO material, L-Alaninium maleate were grown by using the submerged seed solution method. The identity of the crystal was confirmed by single crystal X-ray diffraction. The crystalline perfection was analyzed using high resolution X-ray diffraction and it was found that the crystalline perfe…
The use of crystallization robots for initial screening in macromolecular crystallization is well established. This paper describes how four general optimization techniques, growth-rate modulation, fine screening, seeding and additive screening, have been adapted for automation in a medium-throughput crystallization s…
Potassium ion can critically effect the interaction between collagen microfibrils and mica leading to different ordered structures that vary dramatically with changing ion concentration. AFM images of the structures formed at different ion concentrations appear to be intermediate stages in the progression from disorde…
Polyurethane surfaces were modified by covalent immobilization of different molecular weight heparins (fractionated Mw ~3000 Da, and unfractionated Mw ~17,000—19,000 Da) and examined by ESCA, AFM, and contact angle goniometer. The effect of these different surface-immobilized heparins on blood protein adsorption and o…
Body protective clothing and suits against NBC agents are playing vital role in the NBC defence during war and training scenarios. Hence, reviewing about the past, present and expected future development in this NBC protective clothing area is an important task. This review brings out a sequence related to the NBC pro…
Auf der Grundlage von Rechnungen wurden fluoreszierende Nanokügelchen auf Siliciumbasis mit bestimmten Größen synthetisiert. Die Nanokügelchen sind komplett wasserdispergierbar, hoch photolumineszierend, extrem photobeständig und biokompatibel sowie bemerkenswert effizient für Zellbildgebungsexperimente in Echtzeit un…
The syntheses of a series of bis(thiophosphinic amido) yttrium complexes are reported by the reaction of bis(thiophosphinic amine) ligands with [Y(N(SiMe 3 ) 2 ) 3 ]. The complexation reactions were monitored using NMR spectroscopy and one complex was characterized by single crystal X-ray crystallography. Two substitu…
Since their development, shape memory polymers (SMPs) have been of increasing interest in active materials and structures design. In particular, there has been a growing interest in SMPs for use in adaptive structures because of their ability to switch between low and high stiffness moduli in a relatively short temper…
Approaches to the synthesis of single-, double- and triple-decker complexes of lanthanides with phthalocyanines and their analogues known to date are considered. Examples of preparation of sandwich-type complexes based on other metals of the Periodic system are given.
On the basis of the quantum Sutton-Chen potential, the rapid solidification processes of liquid silver have been studied by molecular dynamics simulation for four cooling rates. By means of several analysis methods, the competitions and transitions between microstructures during the cooling processes have been analyze…