Materials Literature
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This work describes an experimental study of thermal conductance across multiwalled carbon nanotube (CNT) array interfaces, one sided (Si-CNT-Ag) and two sided (Si-CNT-CNT-Cu), using a photoacoustic technique (PA). Well-anchored, dense, and vertically oriented multiwalled CNT arrays have been directly synthesized on S…
Two double-hydrophilic block copolymers, each comprising a nonionic block and an anionic block comprising pendent aromatic sulfonate groups, were used as additives to modify the crystallization of CaCO3. Marked morphological changes in the CaCO3 particles were observed depending on the reaction conditions used. A poly…
The objective of this study was to determine the effects of pre-treated flax fibers on the performance of the fiber-reinforced composites. Lack of good interfacial adhesion and poor resistance to moisture absorption make the use of natural fiber-reinforced composites less attractive. In order to improve fiber/matrix i…
Carbon nanotube (CNT) arrays are being considered as thermal interface materials (TIMs). Using a phase sensitive transient thermo-reflectance technique, we measure the thermal conductance of the two interfaces on each side of a vertically aligned CNT array as well as the CNT array itself. We show that the physically b…
Optically switchable dual-color fluorescent nanoparticles that incorporate two classes of dyes into the polymeric chains have been synthesized using an emulsion polymerization method. The nanoparticles consist of an organic photoisomerizable dye, spiropyran, as an optically responsive component and another fluorescent…
Shape memory polymers (SMP) are lightweight, have a high strain/shape recovery ability, are easy to process, and required properties can be tailored for variety of applications. Recently a number of medical applications have been considered and investigated, especially for polyurethane-based SMP. SMP materials were fo…
The analysis of resonant-type antennas based on the fundamental infinite wavelength supported by certain periodic structures is presented. Since the phase shift is zero for a unit-cell that supports an infinite wavelength, the physical size of the antenna can be arbitrary; the antenna's size is independent of the reso…
A simple and economical route based on ethylene glycol mediated process was developed to synthesize three-dimensional (3D) flowerlike ceria micro/nanocomposite structure using cerium chloride as a reactant. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were adopted to investigate the evolution process…
Insects contain significant amounts of fiber as measured by crude fiber, acid detergent fiber (ADF) or neutral detergent fiber (NDF). It has always been assumed that the fiber in insects represents chitin based on the structural similarity between cellulose and chitin and the fact that the ADF fraction from insects co…
Mussels adhere to a variety of surfaces by depositing a highly specific ensemble of 3,4-dihydroxyphenyl-l-alanine (DOPA) containing proteins. The adhesive properties of Mytilus edulis foot proteins mfp-1 and mfp-3 were directly measured at the nano-scale by using a surface forces apparatus (SFA). An adhesion energy of…
This paper describes a simple and versatile method for growing highly anisotropic nanostructures of Pd, single-crystal nanobars bounded by {100} facets and single-crystal nanorods with their side surfaces enclosed by {100} and {110} facets. According to thermodynamic arguments, Pd atoms should nucleate and grow in a s…
Abstract Increased and accelerated global economic activities over the past century have led to interlinked problems that require urgent attention. The current patterns of production and consumption have raised serious concerns. In this context, greater emphasis has been put on the concept of sustainable economic syst…
Abstract Das Fraunhofer‐Institut für Silicatforschung ISC beschäftigt sich bereits seit vielen Jahren mit der Synthese, Charakterisierung und Verarbeitung von Partikeln auf Basis nichtmetallischer Verbindungen. Beispielsweise werden anorganische und hybride Mikro‐ und Nanopartikel für keramische, optische und medizini…
The Kochen-Specker theorem states that a 3-dimensional complex Euclidean space admits a finite configuration of projective lines such that the corresponding quantum observables (the orthogonal projectors) cannot be assigned with 0 and 1 values in a classically consistent way. This paper shows that the irreducible root…
ADVERTISEMENT RETURN TO ISSUEPREVNoteHierarchical Assembly of PEG-b-Polypeptide Hybrid Block Copolymers on GraphiteGuangzheng Gao, Tao Wang, Junpo He, Xueqin Chen, and Yuliang YangView Author Information Department of Macromolecular Science, Fudan University, Shanghai 200433, China, and the Key Laboratory of Molecular…
Through structured questionnaire, two hundred livestock farmers and veterinary attendants were interviewed on various aspects of poisonous plants in Sokoto State. Forty one (41) poisonous plants were reported to exist in the state. They include Ipomea asarifolia (Duman kada), Sorgum bicolar (Bahuri), Erythrophleum afr…
X-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD) have been investigated at the ${L}_{2,3}$ edges of three heavy rare-earth elementary metals. In addition the XAS and XMCD spectra were calculated using a fully relativistic multiple scattering or Korringa-Kohn-Rostoker formalism. This all…
We carried out the first-principle calculation on the basis of density functional theory (DFT) to investigate the effect of introducing C 35 B to the vicinity of a stable C 35 B−H 2 system. The results indicate that C 35 B approaching C 35 B−H 2 is an energy barrierless process, during which the H 2 molecule has a ten…
Orientation distributions in droplets of liquid crystals with homeotropic anchoring are computed with a simulated annealing algorithm that minimizes the free energy of the Oseen-Frank continuum theory. The droplets exhibit multiple orientational steady states that are separated by finite energy barriers over the entir…
Abstract Bio‐inspired gradient materials based on the biodegradable polymer blend are expected to be indispensable to the new approaches for biomedical applications. In this study, multi‐step casting self‐organization on the aluminum surface are used to control the compositional distribution in the blend films of biod…