Materials Literature
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Abstract Challenges in the thermal dissipation of an electronic package arise from the continuous increase in power density of higher-power devices. Carbon nanotubes (CNTs) are known as the highest thermal conductivity material (2000 W mK −1 ). This excellent thermal property suggests an approach in applying the CNTs…
PURPOSE: To determine whether MRI in combination with an intravascular contrast agent is sensitive to pharmacologically induced vasodilation and vasoconstriction in the rat kidney. MATERIALS AND METHODS: R(2) imaging was performed in 25 Sprague Dawley rats at 3 Tesla in the presence of ferumoxytol, an ultrasmall super…
Abstract The synthesis, characterization and ε‐caprolactone polymerization behavior of lanthanide amido complexes stabilized by ferrocene‐containing N ‐aryloxo functionalized β‐ketoiminate ligand FcCOCH 2 C(Me)N(2‐HO‐5‐Bu t ‐C 6 H 3 ) (LH 2 , Fc = ferrocenyl) are described. The lanthanide amido complexes [LLnN(SiMe 3…
Abstract The corrosion inhibition of ammonium heltamolybdate (AH) and calcium gluconate (CG) for AA6061 alloy in 3% NaCl solution was investigated by the electrochemical measurements. It indicates that AH inhibits the corrosion of AA6061 alloy and acts as an anodic inhibitor. Maximum inhibition efficiency reaches 74.3…
Tip-enhanced Raman spectroscopy (TERS), an emerging technique combining scanning probe microscopy (SPM) and Raman spectroscopy, provides the sensitivity and selectivity necessary for chemical imaging with nanoscale resolution. We demonstrate that coating the fragile plasmonic structures used to enhance the electric fi…
Abstract A key advantage of protein‐based materials is the potential to directly incorporate novel functions via gene fusion to produce a single chimeric polypeptide capable of both self‐assembly and the desired activity. However, facile production of functionalized protein materials is frequently hampered by the need…
We discuss the Brownian dynamics of colloids in confinement with special emphasis on the influence of the solvent dynamics. We review the derivation of a dynamic density functional theory (DDFT) including some aspects of hydrodynamic interactions and its application to the micro-rheology of suspensions. In particular…
We develop an electromagnetic theory of surface enhanced Raman scattering (SERS) from coated nanoparticles with spherical anisotropy in the quasistatic limit. The multipolar polarizability of the spherically coated nanoparticle is derived on the basis of the first-principles approach, and then we employ the Gersten–Ni…
Abstract In this manuscript we report the crosslinking of pre‐existing macromolecules in solution through the use of photoactive benzophenone chromophores. We show that a bifunctional crosslinker composed of two benzophenone chromophores as well as a single benzophenone chromophore crosslink poly (butadiene) and poly…
Poly(N-isopropyl acrylamide) or pNIPAM is a thermoresponsive polymer that is widely studied for use in bioengineering applications. The interest in this polymer lies in the polymer's unique capability to undergo a sharp property change near physiological temperature, which aids in the spontaneous release of biological…
This study aims to investigate how aluminum content in magnesium alloys AZ61 and AZ80 impacts the hot cracking susceptibility of magnesium alloys. Differences in aluminum content are known to influence the total crack length of hot cracking. Magnesium alloy AZ61's total crack length was the longest in one thermal cycl…
Electrospinning is a new and simple method of producing nanofibres by introducing electric field into polymer solutions. We perform an experimental investigation on the influence of processing parameters and solution properties on the structural morphology and average fibre diameter of electrospun polyethylene oxide (…
The equilibrium and flow of polymer films and drops past a surface are characterized by the interface and surface tensions, viscosity, slip length and hydrodynamic boundary position. These parameters of the continuum description are extracted from molecular simulations of coarse-grained models. Hard, corrugated substr…
The fibrous PX-phase of lead titanate (PT), which can be synthesized by a hydrothermal method, has been studied to clarify its structural aspects on the atomic level. By combining synchrotron X-ray diffraction and electron microscope analysis with a first-principles calculation, a unique open-channel structure with a…
Abstract In this article, syntheses of chitin acetate/butyrate copolymers with different contents of acetyl residue in polymer chain have been described. Chitin copolymers as well as pure diacetylchitin (DAC) and dibutyrylchitin (DBC) have been obtained in the reaction of shrimp chitin with mixture of acetic and butyr…
High and large capacitance base–metal–electrode multilayer ceramic capacitors (BME MLCCs) for future application require much thinner dielectric layers (<l μm) than ever before, which means that grain size uniformity of BME MLCC powder should be effectively controlled. In this paper, high‐performance nanosized BME…
In this paper, highly pure Na 0.5 K 0.5 NbO 3 nanopowder was prepared from an economical sol–gel method. Using the nanopowder, dense Na 0.5 K 0.5 NbO 3 ceramics with ultrafine grain sizes in the range of 200–600 nm were fabricated successfully by low‐temperature solid‐state sintering at 1085°C for 4 h. The ultrafine‐g…
Herein we report the synthesis of propanoic acid functionalized ionic liquids (ILs) with various lengths of alkyl chain on the imidazole ring. The synthesized propanoic acid functionalized ILs were used to dissolve Eu(2)O(3) (or Tb(4)O(7)) due to the formation of europium(III) (or terbium(III)) carboxylate, aimed to g…
Größer ist nicht immer besser: Rhodiumpartikel unter 2.5 nm werden auf reduzierbaren Trägern wie Cerdioxid unter CO-Oxidationsbedingungen oxidiert und stabilisiert, während Metallpartikel über 4 nm metallisch bleiben. Die sehr kleinen Rhodiumoxidpartikel sind in der CO-Oxidation zwei Größenordnungen aktiver als die me…
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