Materials Literature
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The variations with pressure in the structural, electronic and magnetic properties of a series of Prussian blue analogues (PBAs) K I M II [Cr III (CN) 6 ] (M = V II , Mn II and Ni II ) and associated isomorphous chlorides K I M II Cr III Cl 6 are investigated within a series of solid-state hybrid density functional ca…
Solubilization of single-walled carbon nanotubes (SWNTs) by physical adsorption of cyclodextrins (CDs), guest molecules, and host−guest complexes was investigated. As guest compounds, sodium adamantanecarboxylate (AdCNa), sodium dodecylbenzenesulfonate (SDBS), sodium ursodeoxycholate (UdCNa), sodium ferrocenecarboxyla…
A series of achiral cationic and anionic amphiphiles employed as templates for mesoporous silica, all showed an excellent ability to form highly ordered helical mesoporous silica (HMS) crystals. It was supposed that the helical mesostructure may originate from the helical propeller-like micelle formed by the achiral a…
We report on detailed spectroscopic ellipsometry investigations on the thermally induced first-order phase transition of rubidium manganese hexacyano-ferrate $(\text{RbMn}[\text{Fe}{(\text{CN})}_{6}])$ pellet sample. This switchable solid shows a cooperative Jahn-Teller distortion coupled with a local charge transfer…
The objective of this research was to study the efficiency of calcium tripolyphosphate and zinc tripolyphosphate as anticorrosive pigments for paints in aggressive environments. Alkyd and epoxy paints, of the solvent-borne type, containing 30% by volume (v/v) of the pigment, were formulated. The pigment volume concent…
Hin und her: Im ausgedehnten Metalloxidnetzwerk eines Polyoxometallats kann eine konzertierte reversible Redoxreaktion stattfinden, wenn die Hohlräume mit einem geeigneten Redoxreagens gefüllt sind (siehe Bild). Auf diese Weise lässt sich reversibel zwischen einer expandierten und einer kontrahierten Netzwerkstruktur…
We studied the polyamorphism of the liquid triphenyl phosphite by means of broadband dielectric spectroscopy at ambient and elevated (p=500 MPa) pressures. The effect of pressure on fragility, liquid-liquid phase transition, and its kinetics is discussed in relation to the two-order-parameter model proposed by Tanaka.…
Abstract Ethylene‐tetrafluoroethylene‐copolymer (ETFE) films with the surface modified layer, which shows the high hydrophilicity and strong adhesion, have been obtained by two‐step treatment using the plasma discharge of hydrocarbon and oxygen‐mixed gas. The relation between the adhesion and the modified state near t…
The spectroscopic properties of the aromatic polyketimine containing 3,8-diamino-6-phenylphenanthridine and ethylene linkage in the main chain (PK1) before and after doping are dominated by an interplay of electron-donating and electron-withdrawing effects mediated by its nitrogen atom and active groups in the dopants…
Kelvin probe force microscopy measurements on micrometer small magnetic spots produced by proton bombardment on bulk graphite reveal a charge transfer from the center of the spot to an external ring with potential variation on the order of 50 mV. The total charge in the spot is neutral. The results can be well underst…
This article presents a critical review and evaluation of several mechanics models which are commonly used for elastic stiffness predictions of polymer/clay nanocomposites (PCNs). In particular, the assumptions and limitations of these models and formulas were examined. Stiffness predictions were compared to published…
Solution-based synthesis of BaAl2S4 was developed for the first time. This blue emission phosphor was synthesized by sulfurization-reduction of the fine oxide precursor prepared by the polymerizable complex method. The proposed technique does not require handling of samples in the glovebox or annealing in evacuated am…
Organic modification of clays with surfactants is required for the preparation of polymer-clay nanocomposites for a variety of applications. We have studied the structure and dynamics of interfaces in synthetic clays modified with phosphonium surfactants. The chemical shifts, line widths, and relaxation times measured…
Quasiperfect ZnO nanoclusters (∼6 nm in diameter) are synthesized in non steady state by an original process (the low energy cluster beam deposition, LECBD). The drastic cooling rate (10 10 K/s) of this cluster source induces an improvement of nanometric ZnO cluster quality as compared to more standard conditions of g…
Plasmas are increasingly being used to functionalize the surface of polymers having complex shapes for biomedical applications such as tissue scaffolds and drug delivering micro-beads. The functionalization often requires affixation of amine (NH 2 ) or O-containing groups. In this paper, results are discussed from a t…
Films of conducting polymers when used as electrodes in an electrolytic solution oxidize and reduce under the flow of anodic and cathodic currents, respectively. The electrochemical reactions induce conformational movements of the chains, generation or destruction of free volume and interchange of ions and solvent wit…
Artificial muscles based on an electrochemomechanical strain (ECMS) in conducting polymers, namely polypyrrole (PPy) film, have been studied from viewpoints of training, fatigue and aging by repeat cycles under tensile loads. ECMS was approximately 2% in a saline solution, resulting from both insertion and exclusion o…
The structural growth sequences and electronic properties of MnGe n ( n = 2–15) clusters have been investigated using density functional theory (DFT) within the generalized gradient approximation (GGA). An extensive search of the lowest-energy structures was conducted by considering a number of structural isomers for…
This paper describes the synthesis of an aqueous colloidal solution of Eu(OH) 3 nanoparticles stabilized by polyvinylalcohol or polyvinylpyrolidone prepared in a sonication bath. These nanoparticles were used as nanolabeling agents for living sperm cells. The nanoparticles retain their desirable optical properties, wh…
A series of manganese(III) corroles were investigated as to their electrochemistry and spectroelectrochemistry in nonaqueous solvents. Up to three oxidations and one reduction were obtained for each complex depending on the solvents. The main compound discussed in this paper is the meso-substituted manganese corrole,…