Materials Literature
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Over the last decade techniques such as confocal light microscopy, in combination with fluorescent labelling, have helped biologists and life scientists to study biological architectures at tissue and cell level in great detail. Meanwhile, obtaining information at very small length scales is possible with the combinat…
The $2644.5\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$ vibrational line observed in ZnO grown by the hydrothermal method and doped with D impurities is split into two components with intensities consistent with the natural abundances of $^{6}\mathrm{Li}$ and $^{7}\mathrm{Li}$, unambiguously establishin…
Abstract Currently, intense research is underway to develop polymer nanocomposites because of their numerous potential applications. However, the uniform dispersion of inorganic nanoparticles in polymer nanocomposites without an additional chemical phase has proved to be a difficult challenge. In this paper, we presen…
In this article, we describe a method to create rough features on silicon surfaces by reactive etching of a photoresist layer. The roughness and, consequently, the wettability of the surfaces can be modified by modifying the duration of plasma etching. Hydrophobic materials deposited on the rough silicon surface can b…
A series of M-type hexaferrite samples with composition Sr1−xLaxFe12O19 (x = 0.00, 0.05, 0.15 and 0.25) were prepared by standard ceramic technique. AC electrical conductivity measurements were carried out at different frequencies (20 Hz–1 MHz) and at different temperatures. The dielectric constant and dielectric loss…
Zinc oxide is an important group II-VI semiconductor material with optical properties that permit stable emission at room temperature. We report on the synthesis of highly uniform nanocrystalline ZnO tetrapod (ZnO-T) nanostructures through a modified chemical vapour transport process. These self assembled nanocrystals…
Structural proteomics has promoted the rapid development of automated protein structure determination using X-ray crystallography. Robotics are now routinely used along the pipeline from genes to protein structures. However, a bottleneck still remains. At synchrotron beamlines, the success rate of automated sample ali…
Abstract The high melt viscosity of polypropylene was studied by grafting bifunctional monomers, 1,6‐hexanediol diacrylate (HDDA) and tripropylene glycol diacrylate (TPGDA), onto homopolypropylene (HPP) and random ter‐polypropylene (RTPP) under electron‐beam irradiation. Creation of the high‐melt‐viscosity polypropyle…
A new type of very compact Pacman bis-porphyrin scaffold has been obtained in which a calix[4]arene spacer provides both cofacial preorganization and flexibility. Changes in the distance between the two tetrapyrrolic macrocycles can be triggered by electrochemistry, where closed and open conformers can be interconvert…
Use of mixtures of blowing agents in thermoplastic foam extrusion has been an industrial practice for a long time. However, it has gained renewed interest in the past few years due to the introduction of difficult-to-process alternative gases, targeted as potential replacement for the banned ozone-depleting blowing ag…
METHODS/PRINCIPLES OF DEPOSITION AND ETCHING OF THIN FILMS Geraldine Cogin Schwartz Introduction Evaporation Chemical Vapor Deposition Photoenhanced CVD Plasma Processing Electrochemical Deposition Spin Coating Conclusion References CHARACTERIZATION Geraldine Cogin Schwartz Introduction Optical Characterization of Die…
Covalent labeling of macromolecules with trace levels (<1%) of a fluorescent dye is proposed as a means to facilitate finding or detecting crystals in crystallization drops. To test the effects of labeled protein concentration on the resulting X-ray diffraction data, experiments were carried out with the model protein…
This study examines the possibility of replacing partially or totally the di(2-ethylhexyl) phthalate (DEHP - low molecular plasticizer) from the poly(vinyl chloride) (PVC) compositions intended for medical devices, with poly("-caprolactone) (PCL - biodegradable, biocompatible, and macromolecular plasticizer). Nine dif…
An L-proline-derived amphiphilic squaraine dye displays unique self- assembly behavior in solution, forming new aggregates with large and symmetrical exciton splitting, while forming layered structures by an unprecedented “self-templating” effect on graphite surfaces. This unusual aggregation behavior is most likely t…
Silica nano-particles were synthesised by chemical methods from tetraethylorthosilicate (TEOS), ethanol (C 2 H 5 OH) and deionized water in the presence of ammonia as catalyst at room temperature. The morphology and structure of colloidal silica particles formed depend on the molar ratio of reagents. The formation of…
Carbon nanofibers (CNFs) are used as both the nucleants and the reinforcements for polystyrene (PS) foams in both batch and continuous extrusion processes with CO 2 as the blowing agent. The inclusion of CNFs exhibits substantial impact on the morphology and properties of PS foams. The presence of CNFs results in a de…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSwelling and Shrinkage of Lamellar Domain of Conformationally Restricted Block Copolymers by Metal ChlorideDong Hyun Lee, Hwang Yong Kim, Jin Kon Kim, June Huh, and Du Yeol RyuView Author Information National Creative Research Cente…
Abstract Rheology of HDPE/maple formulations with two common lubricating systems was studied with the capillary rheometry and the small‐amplitude oscillatory shear experiments. Shear and extensional flow data in the capillary dies revealed different lubricating roles of the additives. Small‐amplitude oscillatory tests…
A systematic study of the surface forces between a cellulose sphere and cellulose thin films of varying crystallinity has been conducted as a function of ionic strength and pH. Semicrystalline cellulose II surfaces and amorphous cellulose films were prepared by spin-coating of the precursor cellulose solutions onto ox…
We describe an electrochemical method of directly growing conducting polymer nanostructures between metal electrodes with the geometry controlled by hydrophilic/hydrophobic patterns. The surface patterning can be achieved by a large number of lithographic methods such as AFM, electron-beam, elastomeric microprinting,…