Materials Literature
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In [R. Planet, S. Santucci and J. Ortin, Phys. Rev. Lett. 102, 094502 (2009)], we reported that both the size and duration of the global avalanches observed during a forced imbibition process follow power law distributions with cut-offs. Following a comment by G. Pruessner, we discuss here the right procedure to perfo…
The elastic, piezoelectric, electronic, and optical properties of a single ZnO monolayer (SZOML) with graphene-like structure are investigated from the first-principles calculations. The phonon dispersion curves contain three acoustic and three optical branches. At $Γ$ point, the out-of-plane acoustic mode has an asym…
Some 25 years ago it was found that semiconductor nanocrystals emitted light. Since then tremendous progress has been made with respect to increasing the emission quantum yields, extending the spectral range that may be addressed, from the UV across to the near infrared, and improving the color purity. Here some major…
Noble metal films deposited over two-dimensional arrays of polystyrene nanospheres constitute a confirmed class of efficient and cost-effective substrates for surface enhanced Raman scattering (SERS). In this paper, we perform scanning confocal SERS microscopy to investigate the spatial (lateral) variations of the SER…
Flexible, transparent, and conductive electrodes are prepared by reduction of the graphene oxide (GO) films which were spin-coated on the polyethylene terephthalate (PET) substrates. On the reduced graphene oxide (rGO) films, ZnO nanorods, as well as p-type and n-type Cu 2 O films with good crystallinity have been ele…
A new approach to loading multiple drugs onto the same drug-delivery nanocarrier in a precisely controllable manner, by covalently preconjugating multiple therapeutic agents through hydrolyzable linkers to form drug conjugates, is reported. In contrast to loading individual types of drugs separately, this drug-conjuga…
Evaluation of the potential hazard of man-made nanomaterials has been hampered by a limited ability to observe and measure nanoparticles in cells. In this study, different concentrations of TiO(2) nanoparticles were suspended in cell culture medium. The suspension was then sonicated and characterized by dynamic light…
We report a seed-mediated synthesis method for the preparation of gold nanocrystals with systematic shape evolution from truncated cubic to cubic, trisoctahedral, and rhombic dodecahedral structures in aqueous solution for the first time. Nanocrystals with transitional morphologies were also synthesized. The combinati…
We present a scalable and facile technique for noncovalent functionalization of graphene with 1-pyrenecarboxylic acid that exfoliates single-, few-, and multilayered graphene flakes into stable aqueous dispersions. The exfoliation mechanism is established using stringent control experiments and detailed characterizati…
In typical semiconductor solar cells, photons with energies above the semiconductor bandgap generate hot charge carriers that quickly cool before all of their energy can be captured, a process that limits device efficiency. Although fabricating the semiconductor in a nanocrystalline morphology can slow this cooling, t…
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTElectrochemistry of Conducting Polymers—Persistent Models and New Concepts†Jürgen Heinze*‡§, Bernardo A. Frontana-Uribe∥#, and Sabine Ludwigs§⊥View Author Information Institute for Physical Chemistry, University of Freiburg, 79104 Freiburg, Germany, Freiburg Materials Researc…
The mechanism of ISA23 · HCl interaction with model membrane vesicles (80-100 nm in diameter) was investigated using EPR in conjunction with SANS. For EPR, 16-DSE was dissolved in the vesicle membrane to measure its dynamics and polarity, whereas a spin-labeled (Tempo)-ISA 23 analogue was used to give a measure of the…
By using interference lithography and electron-beam evaporation and lift-off, we fabricate a series of pairs of elliptical metal-dielectric-metal plates with varying lengths of major and minor axis. Transmission measurements reveal that the magnetic response of the structures show linear shift with both the axis lengt…
Abstract This paper details an improvement in the properties of poly(ethylene terephthalate) (PET) with respect to its use in petroleum engineering by incorporating uniform (monodisperse; 35 to 380 nm) silica (SiO 2 ) particles and polystyreneSiO 2 core–shell particles by melt mixing. The resulting high‐performance n…
Molecular mechanics simulations have been performed to predict the response of boron−nitride nanotubes encapsulated with different numbers of C 60 fullerenes (C 60 @BNNT) during the torsional course. A small number of fullerenes induce a local force to the tube wall and result in an earlier collapse of the tube. But w…
We show by molecular dynamics simulations that configuration-sensitive molecular spectroscopy can be realized on optimally doped graphene sheets vibrated by an oscillatory electric field. High selectivity of the spectroscopy is achieved by maximizing Coulombic binding between the detected molecule and a specific nest,…
Like the rings of a tree: A novel strategy is presented that yields insights on crystal growth processes from retrospective analysis of crystals recovered at the end of the process. The strategy is based on systems in which the composition of the growing crystal surfaces varies during crystal growth, while the crystal…
Abstract Lanthanide helicates are of interest due to their ability to emit either in the visible or in the NIR region. In this context it is important to prepare heterodinuclear helicates and to use them for the investigation of intramolecular communication processes between different complex units. In here we describ…
Abstract We have developed a capillary electrophoresis method to characterize the QD surface ligand interactions with various surfactant systems. The method was demonstrated with 2–5 nm CdSe nanoparticles surface-passivated with trioctylphosphine oxide (TOPO). Water solubility was accomplished by surfactant-assisted p…
We show that gated bilayer graphene zigzag ribbons possess a fast and a slow edge, characterized by edge-state velocities that differ due to non-negligible next-nearest-neighbor hopping elements. By applying bosonization and renormalization group methods, we find that the slow edge can acquire a sizable interaction-in…