Materials Literature
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Abstract Highly fluorescent and visible‐light‐responsive mesostructured organosilica films are successfully obtained by acidic sol–gel polycondensation of oligo(phenylenevinylene) (OPV)‐bridged organosilane and tetraethoxysilane precursors in the presence of a template surfactant. The OPV‐bridged organosilane precurso…
Although scanning thermal microscope has shown the highest spatial resolution in local temperature and thermophysical property measurement, its usefulness has been severely limited due to difficulties in quantitative measurement. We propose a double scan technique that measures temperature only from the heat transfer…
The synthesis of iron oxide nanoparticles by coprecipitation of ferrous and ferric ions was optimized in aqueous and organic medium. For both syntheses, the influence of different factors on the nanoparticle size was successfully evaluated by the “design of experiments” method. This methodology allows finding in very…
Multiwalled carbon nanotube/nylon-6 nanocomposites (MWNT/nylon-6) were prepared by in situ polymerization, whereby functionalized MWNTs (F-MWNTs) and pristine MWNTs (P-MWNTs) were used as reinforcing materials. The F-MWNTs were functionalized by Friedel-Crafts acylation, which introduced aromatic amine (COC(6)H(4)-NH(…
A series of self-assembling multidomain peptides have been designed, synthesized, and tested for their ability to individually suspend single-walled carbon nanotubes (SWCNTs) in water while preserving strong near-IR nanotube luminescence. Photometric and spectral measurements on individual SWCNTs revealed that emissio…
A multichromophoric system, TPA-C-PI, possessing a corrole as the central unit linked to perylene bisimide and N -[4-(phenylethynyl)phenyl]- N, N -diphenylamine was efficiently synthesized, as were the component dyads C-PI and C-TPA . The combination of known methodologies with the newest synthetic advances in Pd-coup…
Phenazines are redox-active bacterial secondary metabolites that participate in important biological processes such as the generation of toxic reactive oxygen species and the reduction of environmental iron. Their biosynthesis from chorismic acid depends on enzymes encoded by the phz operon, but many details of the pa…
This work reports the effect of stiffness and conformation of chain-like polymers on wrapping behaviors around single-walled carbon nanotubes (SWNT). As a model of chain-like polymers, three kinds of poly(dialkylsilane) (PSi)s with random-coiled, flexible, and semiflexible main chains were employed. Complexes of PSi a…
Low resistive contacts were formed on heavily phosphorus-doped diamond (n+) films with phosphorus concentration of over ∼1020cm−3 grown on (111) diamond substrates by microwave plasma enhanced chemical vapor deposition with precise control of growth conditions. The specific contact resistance was determined by charact…
BACKGROUND: Gram-positive bacteria of the genus Anoxybacillus have been found in diverse thermophilic habitats, such as geothermal hot springs and manure, and in processed foods such as gelatin and milk powder. Anoxybacillus flavithermus is a facultatively anaerobic bacterium found in super-saturated silica solutions…
Tumor-targeting drug delivery systems are being the ideal carrier for systemic administration of antiproliferative drugs. RGD peptide (arginine-glycine-aspartic acid) modified liposomes containing paclitaxel (RGD-SSL-PTX). The arginine-glycine-aspartic acid tripeptide (RGD) modified sterically stabilized liposomes (SS…
Glycine nanocrystals, grown in aligned nanometer-scale cylindrical pores of nanoporous polystyrene-poly(dimethyl acrylamide) monoliths by evaporation of imbibed aqueous solutions, adopt preferred orientations with their fast-growth axes aligned parallel with the pore direction. X-ray diffraction analysis revealed the…
The valence band offset of ZnO/AlN heterojunctions is determined by high resolution x-ray photoemission spectroscopy. The valence band of ZnO is found to be 0.43±0.17 eV below that of AlN. Together with the resulting conduction band offset of 3.29±0.20 eV, this indicates that a type-II (staggered) band line up exists…
We find the exact solution of graphene carriers dynamics under electromagnetic radiation. To obtain the solution of the corresponding Dirac equation, we combine Floquet theory with a trial solution. Then the energy spectrum is obtained without using any approximation. We also prove that the energy spectrum presents a…
The effect of external electric fields on the orientation of (MnTi″−VO••)× defect dipoles in ferroelectric BaTiO3 single crystals and its interplay with the domain structure were investigated by means of electron paramagnetic resonance (EPR) spectroscopy and optical microscopy. The results show that in specimens aged…
Polycrystalline AgSbTe2 ternary compound materials with high phase purity were fabricated using a combined process of mechanical alloying and spark plasma sintering. It was found that stoichiometric AgSbTe2 is a promising composition for low-and-mediate temperature applications, whose ZT reaches 1.59 at 673K, benefiti…
The synthesis and spectroscopic properties of a series of boron-free meso -aryl-substituted [14]triphyrin(2.1.1) compounds containing either peripheral bicyclo[2.2.2]octadiene (BCOD) ( 2a − c ) or benzene rings ( 3a − c ) (aryl = phenyl a, 4-fluorophenyl b, and 4-methylbenzoatephenyl c ) are reported. These compounds…
Type-II CdTe/CdSe quantum dots are synthesized by an aqueous method of layer-by-layer epitaxial growth. The QDs are 4–5 nm in diameter witha fluorescence quantum yield up to 12% in the near-infrared region (NIR; see image). They match the demands for the probes of NIR in vivo imaging and are applied in fixed Hela cell…
DOI: 10.1002/adfm.200800672 The acknowledgements for this manuscript contain an error. The correct last line is: We thank Prof. Jing Li in Department of Chemistry and Chemical Biology, Rutgers University and Prof. Xiaoying Huang in Fujian Institute of Research on the Structure of Matter for enjoyable collaboration on…
An alternative design strategy for inventing new triggered gelations was tested. Single crystal X-ray diffraction confirmed that an oxidation can convert a nonplanar dihydropyridine ( 1 ) that exhibits weak 1-D intermolecular interactions into a planar pyridine ( 2 ) that exhibits significant 1-D π-stacking interactio…