Materials Literature
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Organic-inorganic donor-acceptor interfaces are gaining growing attention in organic photovoltaic applications as each component of the interface offers unique attributes. Here we use hybrid density functional theory to examine the electronic structure of sexithiophene/ZnO interfaces. We find that interfacial molecula…
A lattice approach is used to describe the mechanical interaction of a corroding reinforcement bar, the surrounding concrete and the interface between steel reinforcement and concrete. The cross-section of the ribbed reinforcement bar is taken to be circular, assuming that the interaction of the ribs of the deformed r…
We investigate the growth of the recently demonstrated composite material composed of vertically aligned carbon nanotubes capped by few graphene layers. We show that the carbon nanotubes grow epitaxially under the few graphene layers. By using a catalyst and gaseous carbon precursor different from those used originall…
Cyclic voltammetry has been used as a tool to study the quantum confinement in oleic acid stabilized CdTe quantum dot dispersions. The band structure parameters, conduction band edge, valence band edge, and quasi-particle gap, have been estimated as a function of quantum dot size, ranging from ca. 2.4 to 4.7 nm and co…
We use a microfluidic device to prepare monodisperse amphiphilic particles in the shape of a crescent-moon and use these particles to stabilize oil droplets in water. The microfluidic device is comprised of a tapered capillary in a theta (θ) shape that injects two oil phases into water in a single receiving capillary.…
The mononuclear high-spin iron(II) complex 1, coordinated by a pentaisopropylcyclopentadienide and an aryl group (see graphic), has been prepared and characterized by X-ray diffraction analysis. AC magnetic studies have revealed that this species exhibits slow magnetic relaxation and has the characteristics of a singl…
Peptide hydrogels show immense promise as therapeutic materials. Here we present a rationally designed multidomain peptide that self-assembles into nanofibers approximately 8 nm wide, 2 nm high, and micrometers in length in the presence of Mg(2+). At a concentration of 1% by weight, the peptide forms an extensive nano…
The nature of exciton-plasmon interactions in Au-tipped CdS nanorods has been investigated using femtosecond transient absorption spectroscopy. The study demonstrates that the key optoelectronic properties of composite heterostructures comprising electrically coupled metal and semiconductor domains are substantially d…
Recent advances in particle-forming chemistries used for developing nanotechnology has not only widened novel applications for nanoscale materials but also has provided significant concern regarding their biological effects. The present study investigates the inflammatory responses of RAW 264.7 mouse macrophages expos…
Functionalized graphene was prepared by reducing functionalized graphene oxide with poly(diallyldimethylammonium chloride) (PDDA), transferring the surface charge of reduced graphene oxide (RGO) from negative to positive. A composite material of functionalized RGO with manganese dioxide (MnO 2 ) nanosheets can be obta…
We report high magnetic field scanning tunneling microscopy and Landau level spectroscopy of twisted graphene layers grown by chemical vapor deposition. For twist angles exceeding ~3° the low energy carriers exhibit Landau level spectra characteristic of massless Dirac fermions. Above 20° the layers effectively decoup…
International audience
Abstract — The illumination of a dimer metallic nanostructure is known to produce an in-tense source of light, with nanometric size. This confinement of light in the gap between the two material structures can induce an increase of the absorption of the electromagnetic energy in the nanaoantenna itself, and therefore…
<TEX>$CO_2$</TEX> adsorption on mineral sorbents has a potential to sequester <TEX>$CO_2$</TEX>. This study used a density functional theory (DFT) study of <TEX>$CO_2$</TEX> adsorption on barium oxide (BaO) in the presence of <TEX>$H_2O$</TEX> to determine the role of <TEX>$H_2O$</TEX> on the <TEX>$CO_2$</TEX> adsorpt…
This study examined In-Zn-Sn-O (IZTO) films deposited on glass substrates by pulsed DC magnetron sputtering with various substrate temperatures. The structural, electrical, optical properties were analyzed. Xray diffraction showed that the IZTO films prepared at temperatures > <TEX>$150^{\circ}C$</TEX> were crystallin…
Scheme 1. Preparation of polycatenar compounds 1 and 2 through a click reaction
In recent times, there has been an increasing interest in superhydrophobic surfaces, as these surfaces have applications in various fields. 1,2Many different methods for the fabrication of superhydrophobic surfaces have been reported; these include a sol-gel method, 3-6 chemical etching, 7,8 the application of a polym…
Conducting polyaniline-poly(<TEX>$\varepsilon$</TEX>-caprolactone) polymer composites were synthesized via in situ deposition techniques. By dissolving different weight percentages of poly(<TEX>$\varepsilon$</TEX>-caprolactone) (PCL) (10%, 20%, 30%, 40%, and 50%), the oxidative polymerization of aniline was achieved u…
We present a combined approach that relies on computational simulations and scanning tunneling microscopy (STM) measurements to reveal morphological properties and stability criteria of carbon nanotube-DNA (CNT-DNA) constructs. Application of STM allows direct observation of very stable CNT-DNA hybrid structures with…
ZnO nanorods were grown by hydrothermal method. Two kinds of seed layers, Au film and island seed layers were prepared to investigate the effect of seed layer on ZnO nanorods. The ZnO nanorod on Au island seed layer has more unifom diameter and higher density compared to that of ZnO nanorod on Au film seed layer. The…