Materials Literature
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Certain peptide amphiphiles (PAs) in aqueous media are known to form high-aspect-ratio cylindrical nanofibers with hydrophobic cores. Using cholesterol or palmitic acid as the hydrophobe and the biological adhesion epitope RGDS as the hydrophilic segment, we studied the encapsulation of pyrene, a small hydrophobic mol…
Astonishingly uniform polypyrrole nanocoating on morphologically complex cellulosic substances was achieved without disrupting the hierarchical network structures of individual cellulose fibers by means of polymerization-induced adsorption.
A simple mild solution method is developed to synthesize a novel nanoribbon multicomponent precursor. A new 1-D nanostructure, porous structured nanoribbons which are self-assembled by textured ZnO nanoparticles, was found upon removal of ligand molecules from the ribbonlike precursor. The structure combines 1-dimensi…
The past 15 years have seen anincredible surge in research anddevelopment activity aroundsmart materials, the transducersthey enable, and the structuresin which they are embedded.Smart materials are a class ofmaterials that exhibit a strong,repeatable change in physicalproperties in response to chang-ing external cond…
The effects of ECAP temperature and post-ECAP annealing on grain size, texture and mechanical behavior have been examined. The softening of ECAPed Mg alloys despite the considerable grain size refinement has been ascribed to the texture change during ECAP. The strength of the ECAPed AZ31 Mg alloys, however, increased…
Finite-difference-time-domain (FDTD) computer simulations reveal interesting features of the transmission of a linearly polarized plane-wave through a periodic array of sub-wavelength slits in a thick metal film (incident E-field perpendicular to the slits' long axis). The results show that slit transmission has a qua…
Two new octanuclear nickel(II) cage complexes are reported; the second is a new single molecule magnet.
Since the discovery of ordered mesoporous silica, control of the structure of organic layers at the mesoscopic level has become a topic of growing interest for the modification of silica surfaces. In addition, the microstructure of functional groups on the surface also produces new problems specific to mesoporous sili…
Monte Carlo computer simulation studies have been undertaken for virtually all of the ice phases as well as for liquid water for three of the most popular model potentials; namely SPC/E, TIP4P and TIP5P. Densities have been calculated for specific thermodynamic state points and compared to experimental results. The SP…
Antimicrobial enzyme, glucose oxidase (GOX), was covalently immobilized onto amino- and carboxyl-plasma-activated biorientated polypropylene films (BOPP) via glutaraldehyde and carbodiimide chemistries. N2-plasma + NH3 and N2-plasma + CO2 treatments were utilized to create amino (1.1 nmol/cm2) and carboxyl (0.9 nmol/c…
In addition to improvements in lateral resolution in scanning electron microscopy, recent developments of interest here concern extension of the incident beam energy, E(0), over two decades, from approximately 20 keV to approximately 0.1-0.5 keV and the possibility of changing the take-off emission, alpha, of detected…
We have recently highlighted that H-SSZ-13, a highly siliceous zeolite (Si/Al = 11.6) with a chabazitic framework, is the most efficient zeolitic material for hydrogen storage [A. Zecchina, S. Bordiga, J. G. Vitillo, G. Ricchiardi, C. Lamberti, G. Spoto, M. Bjørgen and K. P. Lillerud, J. Am. Chem. Soc., 2005, 127, 636…
The triplet emitting state of an indacene at 774 nm (of 50 ms life-time) was observed for the first time in new ruthenium(II) complexes based on bipartite ligands carrying one or two indacene subunits linked via phenylethynyl connectors to terpyridine fragments.
Electrical Properties and Shrinkage of Carbonized Photoresist Films and the Implications for Carbon Microelectromechanical Systems Devices in Conductive Media, Park, Benjamin Y., Taherabadi, Lili, Wang, Chunlei, Zoval, Jim, Madou, Marc J.
We present a novel method to produce a PMMA-quantum-dot (QD) composite fabricated by pre-polymerization of PMMA and dispersing commercially available colloidal semiconductor QDs. The QDs are stabilized in rapidly formed oligomer matrices, and the complete polymerization of the PMMA-QD composite is achieved by commonly…
Gold nanoparticles with diameters of ca. 13 nm were synthesised by UV irradiation of a supramolecular organogel into which HAuCl4 and tetraoctylammonium bromide had been diffused-the gel network plays an essential role in nanoparticle stabilisation.
Abstract Light‐emitting organic nanofibers made of phenyl molecules like para ‐hexaphenyl ( p ‐6P) and grown on muscovite mica form a model system well‐suited for the study of optics in the sub‐wavelength regime. We demonstrate that p‐ 6P nanofibers can be grown with high control of the morphology of individual nanoag…
In order to establish a method for monitoring whether flashover occurs or not in a string of insulators based on leakage current waveforms and their frequency characteristics, the leakage current waveforms and the frequency characteristics of a string of 120-kN suspension insulators were investigated with artificial c…
New pyridine containing gelators have been used to prepare Pd-functionalised materials with catalytic activity.
For hybrid-electric vehicle applications, supercapacitors show promise for providing low cost per unit power, high-efficiency energy storage, substantially temperature-invariant operation, and high cycle life (potentially equating to one supercapacitor pack per vehicle lifetime). Here we provide a microstructural and…