Materials Literature
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A simple chemical precipitation approach has been established for the synthesis of magnetite nanoparticles under atmospheric air conditions. The process involves precipitation of Fe3O4nanoparticles from an aqueous solution containing ferric chloride, hydrochloric acid, sodium sulphite, ammonium ferrous sulphate and am…
Silver doped sodium borate glasses prepared by melt-quenching technique were checked by XRD technique for their amorphous nature. It is observed that the molar volume increases with increasing Ag2O content leading to open struc- ture. Fourier Transform Infrared spectroscopy (FTIR) reveals the formation of BO3 and BO4…
In this study, we demonstrate, for the first time, that SOSIP, self-organizing surface-initiated polymerization, a method introduced for facile access to complex surface architectures, is compatible with perylenediimides (PDIs), i.e., established chromophores with very important properties. Highly ordered face-to-face…
Chromschieffelinite, Pb 10 Te 6 O 20 (OH) 14 (CrO 4 )(H 2 O) 5 , is a new tellurate from Otto Mountain near Baker, California, named as the chromate analog of schieffelinite, Pb 10 Te 6 O 20 (OH) 14 (SO 4 )(H 2 O) 5 . The new mineral occurs in a single 1 mm vug in a quartz vein. Associated mineral species include: cha…
A novel route for anti-deactivation of methanol-to-propylene catalyst has been established through supporting nano-gold on ZSM-5, which efficiently reinforces the catalytic stability due to the effect of gold nanoparticles on the stabilization of dehydrogenation intermediates within the coking process.
Polymeric particles with diverse surface and internal hierarchical nanostructures were prepared by the dynamic self-assembly of a fluorine-containing diblock copolymer, poly(tert-butylacrylate)-b-poly(2-[(perfluorononenyl) oxy] ethyl methacrylate) (PtBA-b-PFNEMA) in THF/water mixtures. The surface patterns and interna…
Numerical modeling of thermal desorption spectra of hydrogen, which is used for identifying the hydrogen state in metals, is reviewed. The previously proposed models are described in the historical perspective by categorizing them according to the rate-determining processes of hydrogen detrapping and diffusion in the…
ZnO nanocrystals were successfully produced by mechanical milling. It is shown that mechanical milling is very effective and simple to produce ZnO nanoparticles with the possibility of obtaining large quantities of materials. Size effects in ZnO nanoparticles were probed by XRD and UV‐vis and photoluminescence (PL) sp…
Open-cell silicon carbide foams were fabricated from a blend of carbon-filled polysiloxane using three different plastic forming methods: compression molding, injection molding, and extrusion. Compression molding process led to more homogeneous microstructure than the other forming methods, resulting in superior compr…
Morphology (conformation) of carbon nanotubes was changed from extended- toward closed-state upon noncovalent interactions with polyglycerol-poly(ethylene glycol)-polyglycerol ABA type hydrophilic linear-dendritic copolymer and liposome-like nanocapsules were formed. Since one of the proposed reasons for the carcinoge…
Quantum dots (QDs) have many intriguing properties suitable for biomedical imaging applications. The poor tissue penetration of optical imaging in general, including those using QDs, has motivated the development of various QD-based dual-modality imaging agents. In this issue of AJNMMI (http://www.ajnmmi.us), Sun et a…
A series of PVA/PVP/clay nanocomposite were prepared by gamma irradiation with different clay contents of (0.15, 0.3, 1, 1.5, 3 and 5 wt%). The gelation content and swelling behavior were investigated. The morphology and structure of PVA/PVP/clay nanocomposite and dispersion of the clay nanoparticles in the polymeric…
CaCO3 crystallization behavior was studied in the presence of a thermo-responsive polypeptide copolymer, poly(N-isopropyl acrylamide)-b-poly(L-glutamic acid) (PNIPAM-b-PLGA). At lower temperatures, the copolymer dissolved well and the unimers mediated the formation of rosette-like calcite crystals through a mesoscale…
A new ligand family based on picoline, bipyridine and terpyridine containing a nitro moiety has been synthesized and its coordination and sensitization ability for lanthanide ions has been studied. Three new complexes were characterized by X-ray single crystal diffraction and all three show uncommon coordination of th…
Ab initio and density functional theory (DFT) calculations on some model systems are presented to assess the extent to which intermolecular hydrogen bonding can affect the planarity of amide groups. Formamide and urea are examined as archetypes of planar and non-planar amides, respectively. DFT optimisations suggest t…
Typical biopolymers, including soybean, casein, γ-poly(glutamic acid) (PGA), agarose and chitosan, were investigated as stabilizers in the synthesis of nanoporous magnetite colloidal nanocrystal clusters (MCNCs) by the hydrolysis and reduction of iron(III) chloride hydrate in ethylene glycol at 200 °C. The cluster siz…
The zero-phonon transition rate for nitrogen-vacancy centers is enhanced by coupling to photonic crystal resonators fabricated in monocrystalline diamond. Autocorrelation measurements on the spectrally filtered zero-phonon line demonstrate coupling of a single emitter.
N-confused porphyrin (NCP) undergoes controlled regioselective phosphorylations at the inner, outer or both carbon atoms of the inverted pyrrole ring. Reactivity centered at the internal carbon atom is enhanced in the Ag(III) NCP's whereas the preference for perimeter substitution is characteristic of free base NCP. T…
Disclination lines in chiral nematic liquid crystals exhibit larger geometrical diversity than their counterparts in ordinary nematics and form rich entangled structures in systems with dispersed colloidal inclusions. Numerous metastable and stable states separated by low energy barriers allow for simple rewiring of t…
A novel one step approach to fabricate superhydrophobic and superoleophilic electrodeposited coatings is reported. By performing additional surface-initiated atom transfer radical polymerization (SI-ATRP) from the coating, a further change in wettability of the substrates to a variety of liquids was observed.