Materials Literature
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Here we report on a novel and effective technique for the deposition of carbon nanotubes onto surfaces in vacuum directly from a liquid suspension. The technique, based on in-vacuum electrospray ionization, has the potential to bridge the gap between high resolution techniques requiring ultra-high vacuum conditions, a…
We synthesized a series of compounds belonging to a new class of polycatenar-type organogelators, comprising a cyanochalcone unit and a half disklike phenyl group with two or three long alkoxy chains, and investigated their supramolecular assembly with respect to their molecular structures. They formed very stable org…
Abstract In this work, the mechanisms underlying ultrasonic desorption of 4‐chlorophenol from granular activated carbon have been explored. Desorption experiments are investigated in the absence and presence of 516 kHz ultrasound of different intensities. Using three regenerating solutions and two temperatures, it has…
Abstract Four novel polyurethanes (PUs) containing 2,6‐bis(4‐hydroxybenzylidene) cyclohexanone hard segments with four diisocyanate, namely, 4,4′‐diphenylmethane diisocyanate, toluene 2,4‐diisocyanate, isophorone diisocyanate, and hexamethylene diisocyanate, were prepared. Structural elucidation and thermal characteri…
Microcrystals of a diarylethene {1,2-bis[5'-methyl-2'-(2"-pyridyl)thiazolyl]perfluorocyclo-pentene} undergo jumps upon photoirradiation. These photochromic crystals present molecular structural changes upon irradiation with ultraviolet light because of reversible photocyclization reactions. When the energy absorbed by…
Pyridoxine (pyridoxamine) 5'-phosphate oxidase (PPOX) catalyzes the oxidative conversion of pyridoxamine 5'-phosphate (PMP) or pyridoxine 5'-phosphate (PNP) to pyridoxal 5'-phosphate (PLP). The At5g49970 gene of Arabidopsis thaliana shows homology to PPOX's from a number of organisms including the Saccharomyces cerevi…
We present the results of Monte Carlo simulations and density functional theory treatment of interactions between spherical colloidal brushes both in implicit (good) solvent and in an explicit polymeric solution. Overall, theory is seen to be in good agreement with simulations. We find that interactions between hard-s…
In this study, hydrophilic high-luminescent magnetic nanocomposites (LMNCs) composed of both fluorescent clusters (quantum dots, QDs) and magnetic nanoparticles were synthesized. The nanocomposites exhibited high luminescence and were easily separated in an external magnetic field. The LMNCs were capped with streptavi…
We present a detailed study on the electronic properties of monolayers of ${\mathrm{Mn}}_{12}$ derivatives chemically grafted on clean as well as on functionalized Au(111) surfaces. Scanning tunneling microscopy and x-ray photoelectron spectroscopy were employed to ensure the successful monolayer deposition. Unoccupie…
The growth of ZnO nanorods on Au-coated ITO substrates using a low temperature wet chemical process is presented. Electron microscopy and x-ray diffraction observations reveal that the crystalline ZnO nanorods are preferentially oriented along the c axis. Room temperature photoluminescence (PL) measurements reveal a s…
The Fabry-Perot resonance effect is studied in order to achieve subwavelength imaging at a far distance (e.g., about 10 wavelengths) from the source at optical frequencies. Two different structures (with matched and mismatched impedances) of alternative metal and air layers are considered first at a relatively short d…
Equal-channel angular pressing (ECAP) is an effective fabrication process for obtaining ultrafine-grained materials. This paper examines the development of homogeneity in materials processed by ECAP with emphasis on samples of pure aluminum and an Al-6061 alloy processed by ECAP for up to 8 passes at room temperature.…
The shape control of metal nanoparticles allows one to finely tune their properties with great versatility. A self-seeding coreduction method has recently been developed for the synthesis of silver nanodiscs, triangular nanoplates and nanospheres. The addition of surfactants was found to be one of the most important f…
Ordered mesoporous carbon materials with a semi-graphitized structure have been synthesized by directly employing a tri-block copolymer as a structure directing agent and carbon source to form mesoporous carbon. Poly(ethylene oxide) 20 -poly(propylene oxide) 70 -poly(ethylene oxide) 20 (EO 20 PPO 70 EO 20 ), or “P123”…
The formation of a toroidal bubble towards the end of the bubble collapse stage in the neighbourhood of a solid boundary has been successfully studied using the boundary integral method. The further evolution (rebound) of the toroidal bubble is considered with the loss of system energy taken into account. The energy l…
In the generation of nanoparticles for biological applications, the control over synthetic parameters influencing the particles' physicochemical properties are of great interest due to the strong influence of particle size and surface properties on cellular uptake and biodistribution. We have synthesized dextran sulfa…
Bi2Te3/(Bi0.3Sb0.7)2Te3 superlattice thermoelectric nanowires are synthesized by using a template-directed electrodeposition method. Adjustment of the deposition times and potentials enables precise control over the composition and length of each segment of the nanowires. Characterization of the superlattice nanowires…
Preface. Contributors. 1. Biological Applications of Multifunctional Magnetic Nanowires. 2. Nucleic Acid Delivery and Localizing Delivery with Magnetic Nanoparticles. 3. Magnetic Nanoparticles in Cancer Diagnosis and Hyperthermic Treatment. 4. Brownian Motion In Biological Sensing. 5. Dendrimers And Hyperbranched Poly…
A storage material that is suitable for rewritable volume holographic media with a thickness in the millimeter range is presented (see figure). Writing, reading, and deleting are possible by purely optical means, and inscribed multiplexed gratings exhibit good long-term stability. A two-step method of optical deleting…
A method to prepare hierarchical porous gold monoliths was developed. Cast hollow Au/Ag spheres, templated by polystyrene beads, were dealloyed to prepare hollow nanoporous shells, and robust gold monoliths with 2% relative density were readily achieved.