Materials Literature
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Helicobacter pylori AmiF formamidase that hydrolyzes formamide to produce formic acid and ammonia belongs to a member of the nitrilase superfamily. The crystal structure of AmiF was solved to 1.75A resolution using single-wavelength anomalous dispersion methods. The structure consists of a homohexamer related by 3-fol…
To control protein adsorption on surfaces, low-fouling polymer coatings such as poly(ethylene oxide) (PEG or PEO) and polysaccharides are used. Their ability to resist protein adsorption is related to the layer structure, hence the immobilization mode. A polymer array technology was developed to study the structural d…
Microporous titanium oxides synthesized using a hexylamine template were reduced by excess bis(benzene) chromium, bis(cyclopentadienyl) chromium, bis(benzene) vanadium, and bis(cyclopentadienyl) vanadium. These new composite materials were characterized by nitrogen adsorption, powder X-ray diffraction, X-ray photoelec…
Interdisciplinary investigation at the interface of chemistry, engineering, and medicine has enabled the development of self-assembled nanomaterials with novel biochemical and electro-optical properties. We have recently shown that emissive polymersomes, polymer vesicles incorporating porphyrin-based fluorophores, fea…
Uniform core−shell heterostructured ZnWO 4 @MWO 4 (M = Mn, Fe) nanorods with both optical and antiferromagnetic properties have been synthesized by a simple refluxing method under mild conditions in which the crystallization event of MWO 4 happened on the backbone of ZnWO 4 single crystalline nanorods in a ligand-free…
We report surface pressure-area (Pi-A) isotherms of bidisperse mixtures of anionic polystyrene latex particles at a water/n-decane interface as well as optical photographs of the interface for various compressions and mixture ratios. In the case of mixtures of 3 and 5 mum particles, we observe crystalline layers at hi…
Layered double hydroxide (LDH) and dodecyl sulfonate-intercalated layered double hydroxide (SDS-LDH) with an Mg/Al ratio of 3.0 were studied as a support of anionic photosensitizer, palladium phthalocyaninesulfonate (PdPcS). The composite clays were synthesized by two different routes: (i) PdPcS intercalation into the…
High Resolution Image Download MS PowerPoint Slide Textural characterization of porous solids is commonly carried out by N 2 adsorption at 77 K. Additionally, CO 2 adsorption at 273 K and sub-atmospheric pressure was proposed as a complement to N 2 for the more complete characterization of the narrow microporosity. Ho…
Layered double hydroxides (LDHs) Mg:Al 2:1 intercalated with straight-chain hydrocarbon sulfonates have been synthesized by anion exchange and characterized by powder XRD, FTIR, and elemental (C,H and metals) analysis. We find that the interlayer spacing of these LDHs can be explained by an interpenetrating packing mo…
The dynamics of nanoparticle formation in water-in-oil microemulsions via temporal size evolution has been followed from UV-visible absorption spectra of CdS nanoparticles. Existing Monte Carlo (MC) simulations of nanoparticle formation are primarily based on the mechanism of nuclei formation and their growth by coale…
10.1021/ma0613988
A simple and efficient way of dispersing hydrophobic nanofibers in aqueous solution was devised, and its utility in production and application of enzyme-loaded nanofibers was demonstrated. Polystyrene-based nanofibers were produced via an electro-spinning process. A small amount of maleic anhydride group in the polyst…
We report the controlled synthesis of four kinds of cobalt basic salts with different morphologies and colors (pink, blue, green, and lavender) using urea as a hydrolysis agent in the presence of block copolymer P123. Li 2 SO 4 and LiCl were used as salt additives to control the type of cobalt basic salts. It was foun…
Degradable shape-memory polymer networks intended for biomedical applications were synthesized from oligo[(epsilon-hydroxycaproate)-co-glycolate]dimethacrylates with glycolate contents between 0 and 30 mol % using a photopolymerization process. In addition AB copolymer networks were prepared by adding 60 wt % n-butyl…
Soy protein isolates (SPI) and octenyl-succinate (OSA) modified starch were used as paper coating and inclusion matrices of two antimicrobial compounds: cinnamaldehyde and carvacrol. Antimicrobial compound losses from the coated papers were evaluated after the coating and drying process, and the two matrices demonstra…
We report on the observation of ultrafast photo-enhanced ferromagnetism in GaMnAs. It is manifested as a transient magnetization increase on a 100-ps time scale, after an initial sub-ps demagnetization. The dynamic magnetization enhancement exhibits a maximum below the Curie temperature {Tc} and dominates the demagnet…
We report on the magnetic properties of thoroughly characterized Zn1-xCoxO epitaxial thin films, with low Co concentration, x=0.003-0.005. Magnetic and EPR measurements, combined with crystal field theory, reveal that isolated Co2+ ions in ZnO possess a strong single ion anisotropy which leads to an "easy plane" ferro…
Boron nitride nanotubes (BNNTs) have been shown to possess many excellent physical properties, including thermal and mechanical properties. In this work, we report on superior water permeation properties of BNNTs. Specifically, using molecular dynamics simulations, we found that water molecules permeate through the (5…
An alkali-metal-doped effect on the nonlinear optical (NLO) property in new electrides is studied. The electrides are formed by doping alkali atom Li into a fluorocarbon chain H-(CF2-CH2)3-H. Six stable structures of the Lin-H-(CF2-CH2)3-H (n = 1, 2) complexes with all real frequencies are obtained at the MP2/6-31+G (…
One of the most important overall parameters, which can be derived from small-angle X-ray scattering (SAXS) experiments on macromolecular solutions is the molecular mass (MM) of the solute. In particular, for a monodisperse protein solution, MM of the solute is calculated from the extrapolated scattering intensity at…