Materials Literature
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In this work, we have identified key parameters for controlling the surface density of ferritin on metal oxides and observed a conformational change of the protein shell of ferritin occurring exclusively at pH 4. The quartz crystal microbalance with dissipation (QCM-D) monitoring technique was used to examine protein…
Novel photochromic 5-(3'-coumarinyl)-4-(3''-thienyl)thiazoles have been synthesized. These compounds display intensive fluorescence emission in the open form A, which is modulated by light. Fluorescence intensity decreases significantly upon irradiation of A with UV-light (lambda<400 nm) due to formation of the cyclic…
The structure evolution of poly(butylene adipate) (PBA) during isothermal melt crystallization and phase transition processes is investigated by Fourier transform infrared spectroscopy (FTIR). Detailed IR spectra analysis and band assignment are performed to disclose the bands sensitive to the alpha-form crystalline o…
High Resolution Image Download MS PowerPoint Slide Synthesis of thin (5−8 nm) CdS−Mn/ZnS core−shell nanowires (CSNWs) with high aspect ratio (up to ∼150) is reported for the first time. The modified solvothermal synthesis of CSNW involved two steps: the formation of Mn-doped CdS core followed by the ZnS shell. The CSN…
The pressure dependence of the prototypical glass-former propylene carbonate has been investigated over a broad range of temperature and pressure that were inaccessible in previous investigations using dielectric spectroscopy. We find that the viscosity measurements validate the scaling relation, eta(T,V)=J(TV gamma),…
We have used first-principles density functional theory to relax the experimentally reported crystal structures for the low- and high-temperature phases of Mg(BH 4 ) 2, which contain 330 and 704 atoms per unit cell, respectively. The relaxed low-temperature structure was found to belong to the P 6 1 22 space group, wh…
Photochromic fluorophore Sn(TTP)(DTE)2 , in which two phenolic derivatives of 1,2-dithienylethene are axially coordinated to (5,10,15,20-tetratolylporphyrinato)tin(IV) in trans position, has been synthesized and fully characterized by various spectroscopic methods. We have also investigated the photoregulated fluoresc…
Single crystal samples of quenched Fe81.3Ga18.7 and of slow cooled Fe81.3Ga18.6C0.08 exhibit magnetostriction of ∼400ppm. However, they also exhibit a sufficiently high permeability that eddy currents, which form in proportion to sample thickness, limit their operation at high frequencies. During attempts to roll thin…
Because of twisting correlation of crystallites along the radial direction, polyethylene spherulites are known to develop concentric band pattern. The mechanism of branching and reorientation of lamellar crystallites in the banded spherulites has been examined experimentally by optical and atomic force microscopies as…
The phase behavior of a natural nontronite clay was studied for size-selected particles by combining osmotic pressure measurements, visual observations under polarized light, and rheological experiments. In parallel, the positional and orientational correlations of the particles were analyzed by small-angle X-ray scat…
Abstract The phase‐separation behavior and morphology of polycarbonate‐based polyurethanes were investigated as a function of the soft‐segment molecular weight and chemical structure and the 4,4′‐diphenylmethane diisocyanate/1,4‐butanediol based hard‐segment contents. Polarized optical microscopy and atomic force micr…
Monodispersed single crystalline α-GaOOH spindles have been prepared via a simple wet-chemical route at 60 °C, in which GaCl 3 was used as the gallium source and ammonia as the alkali. The α-GaOOH spindles obtained at pH values of 10.0 and 11.0 have a hierarchical layered nanostructure and are comprised of many nanopl…
Depositing materials on a substrate at a glancing angle can create new and unusual structures.
The right bright light: Silver-exchanged zeolite 3A crystals show remarkable luminescent properties. Upon irradiation with high-power UV light, a strong photoactivation process takes place which results in an emission increase of up to two orders of magnitude (see picture). The crystals of interest—or even small domai…
Devices used to carry out mechanochemical transformations are described. General information on the threshold mechanism of ultrafast mechanochemical synthesis in oxide systems (oxide melting points up to 3000 K) in high-energy mills are presented. Results of structural studies of complex oxides prepared by mechanochem…
The electrochemical behavior of stainless steels (SS) in natural waters is characterized by the ennoblement of their free corrosion potential (E(corr)). This phenomenon depends strongly on the settlement of biofilms on SS surfaces. Many hypotheses have been proposed to explain the biofilm action, in particular the enz…
The results of phase-field simulation of domain structures (DSs) in ferroelectric nanorods of different shapes and sizes are presented. It is shown that equilibrium DSs consist of an electrostatically compatible circuit of 180 degrees and 90 degrees domains. A DS in a thin rod contains 90 degrees cubic elastic domains…
Calcium carbonate biomineralization uses complex assemblies of macromolecules that control the nucleation, growth, and positioning of the mineral with great detail. To investigate the mechanisms involved in these processes, for many years Langmuir monolayers have been used as model systems. Here, we descibe the use of…
We demonstrate herein that single-crystalline beta-cobalt hydroxide (beta-Co(OH)(2)) nanosheets can be successfully synthesized in large quantities by a facile hydrothermal synthetic method with aqueous cobalt nitrate as the cobalt source and triethylamine as both an alkaline and a complexing reagent. This synthetic m…
Hierarchical cantaloupe-like and hollow microspherical AlOOH superstructures were successfully synthesized on a large scale via a one-step hydrothermal route. The as-obtained superstructures were characterized by several techniques, such as X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning elec…