Materials Literature
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A hybrid solar cell model composed of a heterojunction cell and a photoelectrochemical (PEC) cell has been proposed and characterized. In the hybrid cell, a thin film of double-walled carbon nanotubes forms a heterojunction with the silicon nanowire (SiNW) array and also functions as the transparent counter electrode…
Selektiv exponierte und durch eine einfache Hydrothermalsynthese erzeugte energiereiche {221}-Facetten mit vielen nichtabgesättigten Oberflächenbindungen, (111)-Terrassen und (110)-Stufen (unteres Bild) auf oktaedrischen SnO2-Nanopartikeln (oben) machen diese zu besseren Gassensoren als Partikel mit anderen Formen. Di…
We study the emergence of a yield stress in dense suspensions of non-Brownian particles by combining local velocity and concentration measurements using magnetic resonance imaging with macroscopic rheometric experiments. We show that the competition between gravity and viscous stresses is at the origin of the developm…
The magnetization curves of monodisperse $\text{Fe}/{\text{Fe}}_{3}{\text{O}}_{4}$ core-shell and ${\text{Fe}}_{3}{\text{O}}_{4}$ hollow-shell nanoparticles reveal an unusual exchange-bias effect. Hysteresis measurements of core-shell particles at 5 K after field cooling exhibit a large loop shift associated with unid…
Heightened concern for human health and environmental protection has stimulated active research on the potential impact of transition-metal ions and their toxic effects, thus it is very demanding to design transition-metal ion detection methods that are cost-effective, rapid, facile, and applicable to the environmenta…
Silica aerogels are sol-gel-derived materials consisting of interconnected nanoparticle building blocks that form an open and highly porous three-dimensional silica network. Flexible aerogel films could have wide applications in various thermal insulation systems. However, aerogel thin films produced with a pure sol-g…
Mixing with the guests: Exposure of the porous spin-crossover framework {Fe(pz)[PtII(CN)4]} to X2 (pz=pyrazine; X2=Cl2, Br2, and I2) leads to incorporation of the halides in the coordinatively unsaturated [PtII(CN)4]2− moieties through oxidative addition, thus affording the mixed-valence series {Fe(pz)[PtII/IV(CN)4(X)…
Surface segregation of the non-noble component of a Pt bimetallic core-shell catalyst can occur even at room temperature under typical fuel cell cathode application conditions. While in an alkaline environment the nanoparticles remain stable, and the alteration in the surface composition can be tracked in situ; in an…
Selective exposure of high-energy {221} facets with many surface dangling bonds, (111) terraces, and (110) steps (bottom picture) at the surface of octahedral SnO2 nanoparticles (top) through a simple hydrothermal synthesis route gives them enhanced gas-sensing performance over particles with other shapes, whereby the…
Neutral or cationic arene ruthenium complexes providing both hydrophilic as well as hydrophobic properties due to the robustness of the ruthenium-arene unit hold a high potential for the development of metal-based anticancer drugs. Mononuclear arene ruthenium complexes containing P- or N-donor ligands or N,N-, N,O- or…
A new polymorph of nonacopper(II) bis(orthoborate) bis(hexaoxodiborate), Cu(9)(BO(3))(2)(B(2)O(6))(2), or Cu(3)B(2)O(6) with Z' = 3, has a pseudo-layered monoclinic structure containing BO(3) triangles and B(2)O(6) units consisting of corner-sharing BO(3) triangles and BO(4) tetrahedra. The compound was obtained durin…
The liquid crystal alignment properties of a spincoated mixture of two commercial homeotropic and planar aligning polyamic acids are investigated. Baking the coated substrates induces cleaving of the long alkyl side chains of the first polyamic acid which weakens the tendency for homeotropic alignment while the imidis…
Vertically aligned polycrystalline CaCu 3 Ti 4 O 12 nanorods were obtained by rf sputtering at low substrate temperatures. The rods grow by electrostatic attraction and aggregation of charged clusters, independently of the substrate used. These nanostructures exhibit a strong nonlinear current × voltage behavior and h…
The structure of a mutant variant of Escherichia coli N-acetyl-d-neuraminic acid lyase (NAL), E192N, in complex with pyruvate has been determined in a new crystal form. It crystallized in space group P2(1)2(1)2(1), with unit-cell parameters a = 78.3, b = 108.5, c = 148.3 angstrom. Pyruvate has been trapped in the acti…
Experiments are described where two oil/water interfaces laden with charged particles move at close proximity relative to one another. The particles on one of the interfaces were observed to be attracted toward the point of closest approach, forming a denser particle monolayer, while the particles on the opposite inte…
The present study aims at exploring the surface and catalytic behavior of Rh/gamma-Al(2)O(3) catalysts during the selective reduction of NO by C(3)H(8) in the presence of excess oxygen, H(2)O, and SO(2) with particular emphasis on identifying the elementary steps that describe the reaction mechanism. To this end, deta…
A model for the elastic coefficients of fiber-reinforced materials is applied toward the analysis of the tensile and shear moduli of nanocomposites reinforced by rod-like cellulose nanoparticles. Our formalism integrates results from percolation theory with micromechanical and effective medium approaches. Polydispersi…
Experimental solubilities of 5-(2-chlorophenyl)-7-nitro-1,3-dihydro-1,4-benzodiazepin-2-one (clonazepam), 7-chloro-1-methyl-5-phenyl-3 H -1,4-benzodiazepin-2-one (diazepam), and 6-(2,3-dichlorophenyl)-1,2,4-triazine-3,5-diamine (lamotrigine) in poly(ethylene glycol) (PEG) 600 (1) + ethanol (2), PEG 600 (1) + water (3)…
New freestanding multilayers consisting of Zr, Mo and silicides have been fabricated and studied as spectral purity filters for the future generation of projection EUV lithography tools with a wavelength of operation 13 nm. The optical properties of multilayers were measured in EUV, visible and IR spectral ranges. Dev…
The energetic changes accompanying domain closure of 3-phosphoglycerate kinase, a typical hinge-bending enzyme, were assessed. Calorimetric titrations of the enzyme with each substrate, both in the absence and presence of the other one, provide information not only about the energetics of substrate binding, but of the…