Materials Literature
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Starting from essentially flat nanometer-thick Fe films, epitaxially grown at room temperature on W(110) surfaces, we used carefully tuned annealing schedules to produce periodic arrays of nanoscale ferromagnetic wires. The structural transition from continuous films to nanowire arrays is accompanied with an in-plane…
Ultrafast dissociation of excitons in CdS quantum dots via electron transfer to adsorbed rhodamine B (RhB) molecules was demonstrated. The rate of electron transfer can be controlled by the number of adsorbates attached on the nanoparticle and transfer time as fast as 12 picoseconds was observed. The rapid and control…
CoSb 3 - x Te x ( x = 0.05 − 0.3 ) skutterudite polycrystals with an average grain size of 160 nm were fabricated by mechanical alloying combined with spark plasma sintering. The variation of lattice parameter with Te content indicates that the solution limit of Te was x=0.15, above which the impurity phases of Te, Co…
Self-assembly of various metallo-supramolecular coordination polyelectrolytes (MEPEs) based on pyridine ring functionalized ditopic bis-terpyridines, as well as the electrochromic property is presented. MEPEs derived from electron-donating OMe functionalized ligands exhibit rapid switching rates, good reversibility, h…
Monodisperse manganese oxide honeycomb and hollow nanospheres have been prepared facilely at room temperature by varying the molar ratio of KMnO 4 and oleic acid. These new nanomaterials were characterized by XRD, SEM, EDS, TEM, and BET measurements. They had robust nanostructures and were stable even after ultrasonic…
Multifunctional nanoparticles are multivalent, remotely-actuated, and imaged non-invasively. Superparamagnetic nanoparticles transduce external electromagnetic energy to heat, thereby melting oligonucleotide duplexes that act as tunable, heat-labile tethers to release model drugs in vivo (see figure).
We have fabricated ballistic n-type carbon nanotube (CNT)-based field-effect transistors (FETs) by contacting semiconducting single wall CNTs using Sc. Together with the demonstrated ballistic p-type CNT FETs using Pd contacts, our work closes the gap for doping-free fabrication of CNT-based ballistic complementary me…
Abstract Solid‐state lighting is a rapidly evolving, emerging technology whose efficiency of conversion of electricity to visible white light is likely to approach 50% within the next several years. This efficiency is significantly higher than that of traditional lighting technologies, giving solid‐state lighting the…
A memory cell consisting of a Pt/VO2/Pt switch element and a Pt/NiO/Pt memory element connected in series. By applying a voltage higher than Vth of 0.6 V, the switch element reaches the on state and the cell can be accessed. Since reset and set voltages are higher than Vth, information can be written by simply applyin…
Inductively coupled plasma mass spectrometry (ICP-MS) was combined with UV–vis−NIR spectrophotometry and transmission electron microscopy to determine the nanocrystal composition and molar extinction coefficient ϵ of colloidal PbSe quantum dot (Q-PbSe) suspensions. The ICP-MS results show a nonstoichiometric Pb/Se rat…
Electrochromic materials, both organic and inorganic, have widespread applications in light-attenuation, displays and analysis. Written in an accessible manner, this book provides a comprehensive treatment of all types of electrochromic systems and their many applications. Coverage develops from electrochromic scope a…
A nanoporous semiconducting template was fabricated by conformal deposition of over anodic aluminum oxide (AAO). Electroless plating was conducted in repeated steps of sensitization, activation, and deposition using as a reducing agent. Variables including pH, temperature, time, and additive were studied for conformal…
The crystal structure of syndiotactic 1,2-poly( E -3-methyl-1,3-pentadiene) has been determined by the combination of X-ray diffraction and molecular mechanics. Energy minimizations performed by various potential functions yielded models of crystal structure with calculated X-ray powder profiles similar to the experim…
Using proteomic technologies, we identified 62 proteins that are oxidized to carbonyl derivatives during growth of Escherichia coli under nitrogen starvation (NS), carbon starvation (CS), and phosphate starvation (PS) conditions. The carbonylated proteins were converted to 2,4-dinitrophenylhydrazone derivatives and th…
We present the collective excitations spectrum (magnetoplasmon spectrum) of Dirac electrons in a weakly modulated single graphene layer in the presence of a uniform magnetic field. We consider electric modulation in one dimension and the magnetic field applied perpendicular to graphene. We derive analytical results fo…
Bent-core liquid crystals derived from boron coordination compounds have been obtained using a novel approach that incorporates a roof-shaped pyrazabole ring at the core, and lateral wings of different lengths in their aromatic and aliphatic parts. The materials were characterized in solution and in the pure state. Me…
Hyperbranched polyethoxysiloxane (HPEOS) is suggested as an adsorption-active medium in the crazing of commercial polypropylene film and as a precursor of silica. As a result of delocalized crazing of polypropylene, the nanoporous materials characterized by the effective volume porosity to 60 vol % are received. The r…
ADVERTISEMENT RETURN TO ISSUECommunicationNEXTHeme-Enabled Electrical Detection of Carbon Monoxide at Room Temperature Using Networked Carbon Nanotube Field-Effect TransistorsXiaochen Dong†, Dongliang Fu†, Moawia O. Ahmed†, Yumeng Shi†, S. G. Mhaisalkar†, Sam Zhang‡, Shabbir Moochhala§, Xinning Ho∥, John A. Rogers∥, a…
We report the full molecular dynamics simulations for fusing the encapsulated fullerene linear chain into a single-walled carbon nanotube when the boron nitride nanopeapods undergo thermal annealing at high temperature. Such supramolecular coalescence inside a one-dimensional confining environment, involving fullerene…
A phenylethynyl Fischer carbene complex was used as a traceless directing group for the regioselective cycloaddition of dithiolethiones to arylacetylene, which constitutes the first synthesis of E-dithiafulvene thione or dithioesters.