Materials Literature
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Abstract Organo‐Montmorillonite (Org‐MMT)/maleic anhydride grafted polypropylene (PP‐ g ‐MAH)/polypropylene nanocomposites have been prepared by melt blending with twin‐screw extruder. The mechanical properties of the nanocomposites and the dispersion of Org‐MMT intercalated by the macromolecular chain were investigat…
Abstract The formation of pentanuclear copper( II ) complexes with the mandelohydroxamic ligand was studied in solution by electrospray ionization mass spectrometry (ESI‐MS), absorption spectrophotometry, circular dichroism and 1 H NMR spectroscopy. The presence of lanthanide( III ) or uranyl ions is essential for the…
Abstract The effect of styrene–butadiene block copolymers (SB) with varying number of blocks and length of styrene blocks on the morphology, rheology, and impact strength of 4/1 polystyrene/low‐density polyethylene (PS/LDPE) blends was studied. The scanning and transmission electron microscopy and X‐ray scattering wer…
An uncooled infrared focal plane array (IR FPA) is a MEMS device that integrates an array of tiny thermal infrared detector pixels. An SOI diode uncooled IR FPA is a type that uses freestanding single-crystal diodes as temperature sensors and has various advantages over the other MEMS-based uncooled IR FPAs. Since the…
Two different algorithms to accelerate ray tracing in surface-to-surface radiation Monte Carlo calculations are investigated. The first algorithm is the well-known binary spatial partitioning (BSP) algorithm, which recursively bisects the computational domain into a set of hierarchically linked boxes that are then mad…
We have developed a new ternary polymeric system, poly(ethylene-alt-propylene) (PEP)/poly(butylene oxide) (PBO)/PEP-PBO, to study the complex phase behavior near the bicontinuous microemulsion phase channel. The molecular weights of the PEP and PBO homopolymers are 2600 and 3050 g/mol, respectively, and the copolymer…
A biohybrid system composed of neuronal cells and silicon-supported nanoporous membranes has been designed to facilitate control of the biochemical environment of neuronal networks with cellular resolution. The membranes may exhibit variable pore sizes and interpore distances and are interfaced to a microfluidic devic…
Abstract Besides hydrolysis, the physical properties of poly( L ‐lactic acid), PLLA, may change, at a shorter time‐scale, at physiological temperature, because of structural relaxation. This process may be relevant as it may contribute for the time‐dependent modifications of the mechanical performance of PLLA‐based im…
Mesenchymal stem cells (MSCs) are capable of differentiating into multiple cell lineages and are useful for therapeutic applications. Labeling the MSCs with fluorescent probes is beneficial in tracing the fate of MSCs after implantation. We have introduced the CdSe/ZnS quantum dots (QDs) into the human bone marrow MSC…
Heptanuclear metal-centered, six-membered, mixed-valent, heterometallic wheels 1-3 of iron, manganese, and indium were prepared in a one-pot reaction from N-benzyldiethanolamine (H2L(1)), cesium carbonate, [PPh4]2[MnCl4], and FeCl3 or InCl3. All three complexes were characterized by the combination of elemental analys…
Thin films of $\mathrm{V}(\mathrm{TCNE}{)}_{x}$ were deposited in ultrahigh vacuum using a film growth technique based on in situ chemical vapor deposition of tetracyanoethylene, TCNE, and bis-benzene vanadium, $\mathrm{V}({\mathrm{C}}_{6}{\mathrm{H}}_{6}{)}_{2}$. The in situ preparation method enabled, for the first…
Ten trans-A2B and A3-type corrole photosensitizers carrying functional groups were synthesized and screened for PDT activities. Photocytotoxicity was measured by the MTT cell reduction assay on a cultured human nasopharyngeal carcinoma (NPC) cell line (HONE-1). Experimental results indicated that corroles containing a…
This study extends the understanding of the effects of morphology and chain architecture on mechanical properties of block copolymers by isolating the effect of morphology from other factors, such as composition and molecular weight. Using a single poly(isoprene−styrene−isoprene) triblock copolymer (ISI), we have used…
Fe3O4 particles embedded in bamboo-shaped carbon microtubes (defined as "BCIOs") with ferromagnetic properties were in situ produced by redox reactions between ferrocene and glycerol in a stainless steel autoclave of 20-mL capacity at 600 degrees C; these BCIOs have wide and periodic variable outer diameter distributi…
Scission precision: The combination of Lewis acidic and Lewis basic building blocks in copper(I) thiolate clusters enables control of the thermal decomposition pathway in the design of new molecular precursors for Cu2S formation. After CS bond scission, large clusters with cuprous sulfide cores are isolated as interm…
Photochemisches Schalten der Dielektrizitätskonstante trifft man erstmalig in dem Spin-Crossover-Komplex [Fe(L)(CN)2]⋅H2O an (siehe Bild; L=2,13-Dimethyl-6,9-dioxa-3,12,18-triazabicyclo[12.3.1]octadeca-1(18),2,12,14,16-pentaen). Die elektrische Detektion des photoinduzierten Wechsels des Spinzustands lässt derartige K…
Single and double layered composite microspheres were prepared by encapsulating gentamicin-loaded silica xerogels with biodegradable PLGA polymers (poly(DL-lactide-co-glycolide)). The in vitro drug release properties of both the composite microspheres were investigated. The single layered composite microspheres showed…
The use of salicylaldehyde oxime (H2salox) in iron(III) carboxylate chemistry has yielded two new hexanuclear compounds [Fe6(mu3-O)2(O2CPh)10(salox)2(L)2].xMeCN.yH2O [L = MeCONH2, x = 6, y = 0 (1); L = H2O, x = 2, y = 3 (2)]. Compound 1 crystallizes in the triclinic space group P with (at 25 degrees C) a = 13.210(8) A…
Abstract The corrosion inhibition of aluminum in H 2 SO 4 in the presence of polyvinyl alcohol (PVA) and polyethylene glycol (PEG) and the effect of addition of halides (KCl, KBr, KI) was studied using the hydrogen evolution technique at 30 and 40°C. Inhibition efficiency (% I ) increases with concentration of PVA and…
This paper aims to clarify the calculation of effective phase volume fractions in polymer−clay nanocomposites so that conventional composite theory for the volume fraction dependencies of properties can be applied. In this way, such nanocomposites, which are treated as a separate class of composites, can be brought un…