Materials Literature
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The one-loop polarization function of graphene has been calculated at zero temperature for arbitrary wavevector, frequency, chemical potential (doping), and band gap. The result is expressed in terms of elementary functions and is used to find the dispersion of the plasmon mode and the static screening within the rand…
Concerns about the potential adverse health effects of engineered nanoparticles stems in part from the possibility that some materials display unique chemical and physical properties at nanoscales which could exacerbate their biological activity. However, studies that have assessed the effect of particle size across a…
A novel technique is described to functionalize gold nanorods (GNRs) allowing for in vivo targeting of breast cancer tumors grown in athymic nude mice. GNRs were functionalized by covalent attachment of Herceptin (HER), a monoclonal antibody that enables molecular recognition of breast cancer cells expressing highly s…
This review article is intended to be a comprehensive, and yet critical, collection of the trinuclear metallacycles described to date. The main focus will be on the geometry of the metallacycles: the synthetic pathway leading to these species will not be used as a discriminating factor. In most cases, they were obtain…
Magnetic, dielectric and calorimetric studies on 0.9BiFeO3-0.1BaTiO3 indicate strong magnetoelectric coupling. XRD studies reveal a very remarkable change in the rhombohedral distortion angle and a significant shift in the atomic positions at the magnetic Tc due to an isostructural phase transition. The calculated pol…
This tutorial review serves as an introduction to helical self-assembled systems, illustrated by a specific class of helical aggregates: helical nanofibers. The common ways by which these systems are designed, prepared, and characterized will be presented.
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTOrganic Reactions on Silica in WaterSatoshi Minakata* and Mitsuo KomatsuView Author Information Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan* Author to whom correspondence should be addressed (e…
The new nonlinear optical (NLO) crystal BaGa 4 S 7 for the mid-infrared (IR) has been grown by a Bridgman-Stockbarger technique. Polycrystalline materials with stoichiometric composition were synthesized from BaS, Ga, and S as the initial materials by solid-state reactions. The ultraviolet (UV) and IR transmittance of…
Research has demonstrated that metallic nanoparticles produce toxicity in aquatic organisms that is due largely to effects of particulates as opposed to release of dissolved ions. The present research examined the interplay of nanoparticle composition and dissolution on response of the zebrafish gill following exposur…
Covalently bonded carbon nitride materials (e.g., g-C(3)N(4)) have numerous potential applications ranging from semiconductors to fuel cells. But their solubility is poor, which makes characterization and processing difficult. Moreover, the chemistry of the as-synthesized carbon nitrides has been widely neglected. Her…
A representative series of polymeric hydrated lanthanoid perfluoroadipates [Ln 2 (pfad) 3 (H 2 O) n ]·mH 2 O (Ln = La, Ce, Nd, Gd, Yb) has been prepared from the reaction of perfluoroadipic acid with either the appropriate lanthanoid oxide or Ce 2 (CO 3 ) 3 in water. X-ray crystal structures showed [Ln 2 (pfad) 3 (H 2…
Domain wall motion and phase transformations are driven by stress and electric field, are rate and temperature dependent, and can occur at relatively low stress and electric field levels due to field concentrators such as pores and electrode edges. Analysis of this behavior requires multiaxial material models with hys…
The fiber-filled composites exhibit a great variety of dielectric dispersion behaviors in some papers. To tailor their dielectric dispersion, we must find out more details on fiber-filled composites. For this purpose, the electromagnetic properties of conducting fiber-foam composites are studied in this paper in terms…
Von roten zu schwarzen Porphyrinen: „Schwarze“ Porphyrine absorbieren sichtbares Licht bei allen Wellenlängen sehr effektiv. Sie werden durch Konjugation einer Porphyrin-Einheit mit vier Benzochinon-Einheiten erhalten (siehe Schema) und sind robuste molekulare Komponenten, die dank der vollständigen Absorption des sic…
Studies of the spin transition behavior of the mononuclear compound [Fe(pythiaz)(2)](BF(4))(2) have been carried out under hydrostatic pressures up to 9.13 kbar in the 5-300 K temperature range. Under ambient pressure this compound exhibits an approximately half-step (incomplete) HS [Formula: see text] LS transition w…
Magnetoelectric composites were synthesized from piezoelectric BaTiO3 and ferrimagnetic NiFe2O4. These two phases are mixed, mechanically milled and heat treated. A characterization is made by means of electronic microscopy and x-ray diffraction. The results of the magnetic, electric, ferroelectric and piezoelectrical…
We report the chemical synthesis and structural studies of thiol-capped Au nanoparticles (NPs) using extended X-ray absorption fine structures (EXAFS) and high-resolution transmission electron microscopy (HRTEM). Synthesis of Au NPs was conducted in one case in a toluene/water two-phase system using alkanethiols with…
Thin-film capacitor heterostructures were formed by atomic layer deposition of 54 nm thick polycrystalline barium strontium titanate film on silicon substrates using Pt top and bottom electrodes. The dielectric response of capacitors was experimentally studied as a function of frequency, temperature, and applied field…
The dielectric properties of newly synthesized AgInP2S6 crystals were investigated in broad frequency (20 Hz–1 MHz) and temperature range (110 K–350 K). No anomaly in temperature dependence of complex dielectric permittivity indicating the polar phase transition can be detected down to the lowest temperatures. The die…
Electrochemical behavior and related optoelectronic properties of CdSe nanocrystals (NCs) in aprotic solutions have been investigated. NCs of 2.50 ± 0.50 nm diameter were synthesized using a modified procedure in which the temperatures at the time of Se precursor injection and NC growth were controlled. The electroche…