Materials Literature
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Good solvent, poor solvent: A simple precipitation method enabled the spontaneous formation of homogeneous C70 cube crystals by self-crystallization in cavities of a good solvent (mesitylene) surrounded by a poor solvent (isopropyl alcohol, IPA; see picture). The enormously increased photoluminescence (PL) intensity o…
Carbon-coated SnO 2 nanoparticles were synthesized by a simple one-pot hydrothermal treatment. During the hydrothermal process, SnO 2 was formed by the hydrolysis of tin(II) dichloride dihydrate (SnCl 2 ·2H 2 O) in alkali solution, while sucrose was used as the carbon source to form the coated polysaccharide shell on…
A platinum 2,2′-bipyridine complex ( 1 ) bearing 2-(benzothiazol-2′-yl)-9,9-diethyl-7-ethynylfluorene ligands was synthesized and characterized. Its photophysical properties and nonlinear absorption characteristics were systematically investigated by UV−vis absorption, emission, and transient difference absorption spe…
Abstract We present a combined numerical charge transport and morphology model to describe the current density–voltage ( j – V ) characteristics of three different, benchmark polymer:fullerene bulk heterojunction organic solar cells in which the device performance critically depends on the processing conditions or com…
The pigmentation of insects has served as an excellent model for the study of morphological trait evolution and developmental biology. The melanism (mln) mutant of the silkworm Bombyx mori is notable for its strong black coloration, phenotypic differences between larval and adult stages, and its widespread use in stra…
Getting bigger: Oriented attachment takes place among large hematite nanocrystals with a size over 100 nm to form 2D assemblies that further assemble into 3D superstructures through dipole–dipole interactions. Based on shape selectivity, 1D nanorods can be assembled into 3D quasi nanocubes by oriented attachment.
Titanium dioxide (TiO2) is a promising photocatalyst for degradation of organic compounds ideally under environmentally benign conditions. This paper reviews recent developments in designing TiO2-sorbent hybrid photocatalysts, especially those supported on ordered nano-porous silica materials including zeolites and me…
One, two, three, whee! After transfer into the gas phase, the three-helix bundle protein KIX is sufficiently stabilized by electrostatic interactions to compensate for the loss of hydrophobic bonding. It thus retains its global fold on a timescale of more than 4 s.
Abstract Electrochemical methods were developed for the deposition of nanosilicon onto a 3D virus‐structured nickel current collector. This nickel current collector is composed of self‐assembled nanowire‐like rods of genetically modified tobacco mosaic virus (TMV1cys), chemically coated in nickel to create a complex h…
Abstract Studies on a resistive switching memory based on a silver‐ion‐conductive solid polymer electrolyte (SPE) are reported. Simple Ag/SPE/Pt structures containing polyethylene oxide–silver perchlorate complexes exhibit bipolar resistive switching under bias voltage sweeping. The switching behavior depends strongly…
Metal-dioxygen adducts are key intermediates detected in the catalytic cycles of dioxygen activation by metalloenzymes and biomimetic compounds. In this study, mononuclear cobalt(III)-peroxo complexes bearing tetraazamacrocyclic ligands, [Co(12-TMC)(O(2))](+) and [Co(13-TMC)(O(2))](+), were synthesized by reacting [Co…
Abstract Photocatalysts for efficient solar hydrogen production are highly sought after. Here a new type of nitrogen‐doped tantalum tungstenate (CsTaWO 6 ) material, which demonstrates excellent visible light absorption and improved photocatalytic activity, is demonstrated. X‐ray diffraction (XRD) patterns reveal that…
Three classes of amine-functionalized mesocellular foam (MCF) materials are prepared and evaluated as CO(2) adsorbents. The stability of the adsorbents under steam/air and steam/nitrogen conditions is investigated using a Parr autoclave reactor to simulate, in an accelerated manner, the exposure that such adsorbents w…
Seeing the light: Two highly porous metal–organic frameworks (MOFs) were transformed using UV light to produce MOFs with hydroxy and catechol groups through an unusual postsynthetic deprotection reaction (see scheme).
Inkjet printing of functional materials is a key technology toward ultra-low-cost, large-area electronics. We demonstrate low-temperature 3D micro metal structure fabrication by direct inkjet printing of metal nanoparticles (NPs) as a versatile, direct 3D metal structuring approach representing an alternative to conve…
This paper reviews many design issues and analysis techniques for the brushless permanent-magnet machine. It reviews the basic requirements for the use of both ac and dc machines and issues concerning the selection of pole number, winding layout, rotor topology, drive strategy, field weakening, and cooling. These are…
PURPOSE: To explore the optical and physiologic properties of normal and lesion-bearing breasts by using a combined optical and digital breast tomosynthesis (DBT) imaging system. MATERIALS AND METHODS: Institutional review board approval and patient informed consent were obtained for this HIPAA-compliant study. Combin…
Metal−organic framework (MOF) crystals of Cu 3 (BTC) 2 with a high surface area (1396 m 2 ·g −1 ) were synthesized and mixed with polyimide (PI) to prepare mixed-matrix membranes (MMMs) for gas separations. The PI−Cu 3 (BTC) 2 blend was successfully spun into MMM hollow fiber by the dry/wet-spinning method. SEM images…
Abstract In this study, we report high performance organic solar cells with spray coated hole‐transport and active layers. With optimized ink formulations we are able to deposit films with controlled thickness and very low surface roughness (<10 nm). Specifically we deposit smooth and uniform 40 nm thick films of poly…
Abstract Monodisperse and homogeneous Pt x Ni 1‐ x alloy nanoparticles of various compositions are synthesized via an organic solution approach in order to reveal the correlation between surface chemistry and their electrocatalytic properties. Atomic‐level microscopic analysis of the compositional profile and modeling…