Materials Literature
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Here we present three different types of mechanically stable nanometer-sized hollow capsules. The common point of the currently developed systems in our laboratory is that they are liposome based. Biomolecules can be used to functionalize lipid vesicles to create a new type of intelligent material. For example, insert…
We theoretically study in detail the hydrodynamic coupling of two equal-sized colloidal spheres at low Reynolds numbers assuming the particles to be harmonically trapped with respect to both their positions and orientations. By taking into account the rotational motion, we obtain a rich spectrum of collective eigenmod…
Conversion of electronic excitation energy into vibrational energy was investigated for photochromic spiropyran molecules, using femtosecond UV-mid-IR pump-probe spectroscopy. We observe a weaker energy gap dependence than demanded by the "energy gap law". We demonstrate that large conformational changes accompanying…
The adsorption of NO 2 was investigated and compared on Na− and Ba−Y, FAU zeolites both in the absence and presence of adsorbed water using FTIR and TPD techniques. The same ionic NO x species (NO +, NO + NO 2, NO 3 - ), formed by the disproportionation of NO 2, were observed to form on both materials under dry condit…
The purpose of this experiment was to evaluate the effect of microstructure on sulfide stress cracking (SSC) properties of line pipe steel. Different kinds of microstructures, with chemical compositions identical to one steel heat, were produced by various thermomechanically controlled processes (TMCP). Coarse ferrite…
Abstract A novel mesoporous solid acid catalyst named UDCaT‐4 was designed by loading persulfated alumina and zirconia (PAZ) into highly oredered, hexagonal mesoporous silica (HMS). UDCaT‐4 was characterized by XRD, BET surface area and pore size analysis which revealed that neither pore blocking nor structure collaps…
10.1021/la034610z
Abstract Summary: The compound 4‐hydroxycinnamic acid (4HCA), a natural biomonomer, is polymerized by melt polycondensation to yield a liquid‐crystalline biopolymer (P4HCA) with UV reactivity. L929 cells were successfully incubated on P4HCA films at 37 °C. Structure of poly(4‐hydroxycinnamic acid) (P4HCA) and its cros…
Bone-like biological materials have achieved superior mechanical properties through hierarchical composite structures of mineral and protein. Gecko and many insects have evolved hierarchical surface structures to achieve extraordinary adhesion capabilities. We show that the nanometer scale plays a key role in allowing…
This paper investigates the liquid absorbency potential of the vegetal cell-fibers (CF) of Luffa cylindrica (LC) in relation to their microscopic morphology. Absorption after drainage and centrifugation, involving deionized water and saline solutions, is measured on both the raw fibers of the vegetal net and the cell-…
Abstract Single‐crystals of MnFe 2 O 4 nanorods with an average diameter of 20 nm and length of 250 nm were synthesized by a hydrothermal process at 180 °C after 12 h. High‐resolution transmission electron microscopy (HRTEM) and electron diffraction (ED) analysis revealed that the nanorods grow along the [110] axis, w…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTEnergy Transfer in Fluorescent Silica NanoparticlesMarco Montalti, Luca Prodi, Nelsi Zaccheroni, Andrea Zattoni, Pierluigi Reschiglian, and Giuseppe FaliniView Author Information Dipartimento di Chimica "G.Ciamician", Università di Bologna, Via Selmi 2, 40126 Bologna, Italy Cit…
Under stoichiometric conditions, the segmental tris-tridentate ligand L9 assembles with two different lanthanide metal ions Ln(1) and Ln(2) (Ln(1), Ln(2)=La, Nd, Sm, Eu, Yb, Lu, Y) to give mixtures of the heterotrimetallic triple-stranded helicates [(Ln(1))(x)(Ln(2))(3-x)(L9)(3)](9+) (x=0-3) in acetonitrile. The combi…
The introduction of accurate material modeling such as hysteresis phenomenon in numerical field calculation leads to numerical problems induced by the nonlinear properties of the initial system. We focus on the solution of the magnetic field diffusion equation, which contains such problems. This paper presents a new f…
The structure of the subsurface layer of polymethylmethacrylate (PMMA) formed by bombardment with low-energy ions of Ar is reported. It was found that the subsurface region contains a graphitized, cross-linked, and low-molecular weight layers. We argue that ion etching of PMMA is mostly determined by the properties of…
Abstract Nowadays Celluloseacetate is mainly produced with the acetic acid process. After an activation with acetic acid and sulfuric acid the acetylation of the cellulose starts by adding acetic anhydride. The temperature and the catalyst concentration play an important role for the reaction. Beneath acetylation also…
Abstract The first cellulose acetate fiber, commonly referred to as acetate, was produced in Europe in 1918 and on a large scale in the United States of America in 1924 making acetate the second man‐made fiber to be produced. 1 The usage of acetate worldwide peaked at a consumption of approximately 400 kilotons in the…
Novel anion-exchange anticorrosion pigments consisting of nitrate-, carbonate-, and chromate-exchanged hydrotalcite (HT) are shown to inhibit the propagation of filiform corrosion (FFC) effectively on organic-coated aluminum alloy 2024-T3 (AA2024-T3 [UNS A92024]) alloy. The HT-pigments are dispersed in polyvinyl butyr…
The authors present a novel time-domain homogenization technique for laminated iron cores in three-dimensional (3-D) FE models of electromagnetic devices when using the magnetic vector potential formulation. The method is based on a polynomial orthogonal decomposition of the variation of the induction throughout the t…
Nothing in biology stimulates the imagination like the development of a single fertilized egg into a newborn child. Consequently, a major focus of biomedical research is aimed at understanding cell differentiation, proliferation, and specialization during child health and human development. However, the fact that the…