Materials Literature
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High energy-rate metalworking has significant advantages, in that short time scales change the fundamental nature of the forming process and short duration impulses can be used with much lighter and more agile equipment because large static forces do not need to be resisted. Here, we propose the use of thin aluminum f…
We propose a realistic model of the optical properties of silver, in which inter-band transition with a threshold energy of ∼4 eV is described phenomenologically by an ensemble of oscillators with same damping constant and a certain distribution of resonant frequencies from the interband transition threshold to infini…
We studied the metallization behavior of molecularly thin Ru0.95O20.2− nanosheets obtained from complete delamination of a layered ruthenate, K0.2RuO2.1. Heating at 200°C under a mixture of N2 and H2 transformed multilayers of the nanosheets into hcp-Ru metals. These metals have unique morphology reflecting the multil…
Nanoparticle-aggregated Au microcages have been successfully synthesized from sacrificial hollow Cu microstructures, and exhibit remarkable surface-enhanced Raman scattering activity for 4-mercaptobenzoic acid.
We present an efficient computation technique for ab‐initio electron transport calculations based on density functional theory and the nonequilibrium Green’s function formalism for application to heterostructures with two‐dimensional (2D) interfaces. The computational load for constructing the Green’s functions, which…
In this paper we show that dye distributions within polymer core/shell nanoparticles (NPs), grown in multiple steps, are controlled not only by the synthesis route, but are also governed by dye diffusion between core and shell, resulting in dye distributions completely different from the targeted ones. We show that Fö…
Dynamic-mechanical (DMA) tests have not yet been conducted in malva aligned fiber reinforcing polymeric composites. In this work, the temperature dependence of the DMA parameters in polyester matrix composites reinforced with up to 30% in volume of continuous and aligned malva fibers was investigated. These parameters…
Recent studies of graphene have demonstrated its great potential for highly sensitive resonators. In order to capture the intrinsic vibrational characteristics of graphene, we propose an atomistic modeling method called the elastic network model (ENM), in which a graphene sheet is modeled as a mass-spring network of a…
In order to impart full pH-range responsiveness within biocompatible hyperbranched polyethers, new amphiphilic polyethers, <italic>i.e.</italic> HPMHO–Amines and HPMHO–Carboxys, which have a molecular structure similar to hyperbranched PEG, were prepared through ring-opening polymerization and modified by amination or…
The Ho doped BaTiO3 ceramics, with different Ho2O3 content, ranging from 0.01 to 1.0 wt % Ho, were investigated regarding their microstructural and dielectric characteristics. Doped BaTiO3 were prepared using conventional solid state reaction and sintered at 1380?C for four hours. SEM analysis of Ho/BaTiO3 doped ceram…
Intrinsic viscosity [η] of nine pullulan samples with different molecular weights and narrow molecular weight distributions are obtained in 1-butyl-3-methylimidazolium chloride (BmimCl) and 1-ethyl-3-methylimidazolium acetate (EmimAc) from the Newtonian viscosities measured by oscillatory and steady shear flow in conv…
The diffraction efficiency of periodic microstructures composed of photoresponsive liquid crystals and polymer gratings is modulated using visible CW or pulsed radiation. A polymeric template (static grating) enabled by holographic photopatterning was infiltrated by capillary flow with a high performance photosensitiv…
Energy crises are one of the biggest crises of the world today. With ever increasing gadgets and machinery required for a comfortable lifestyle the demand for more and more energy is on its peak. So the present energy consumption scenario demands a much smarter and efficient energy storing technology. Henceforth, we n…
In this paper we demonstrate a novel complex array structure comprising well-aligned Au nanorods (10 nm in diameter) encapsulated inside 15 nm radius multiwalled carbon nanotubes (MWCNTs). A pre-aligned and open-ended nanoporous MWCNT membrane is used as the starting material. Au nanorods are precisely deposited and a…
The perylene derivatives 3-isocyanoperylene (Per-N≡C) (4a) and N-(2,5-di-tert-butylphenyl)-9-isocyano-perylene-3,4-dicarboximide (PMI-N≡C) (4b) were prepared and used to synthesize gold complexes [AuX(CNR)] (X = C6F5 (5a,b), C6F4-O(n)Bu-p (6b)). The reaction of 5b and 6b with HNEt2 led to the carbene complexes [AuX{C(…
A photothermal pH-reporting nanoprobe was developed for intraoperative tumor detection by "turn-on" fluorescence of the probe inside viable tumor cells, photothermal tumor therapy, and in situ monitoring of tumor killing by non-fluorescence of the probe in damaged cells.
In this paper we study the problem of thermal convection in a laterally heated, finite, horizontal cylinder. We consider cylinders of moderate aspect ratio (height/diameter ≈2) containing a small Prandtl number fluid (σ &lt; 0.026) typical of molten metals and molten semiconductors. We use the Navier-Stokes and en…
The purpose of this study is to compare the gelling behavior of two molecules: a chiral compound and its achiral counterpart. The chiral partner is characterized by a rigid, chiral pyrrolidine nucleus, while the achiral one contains a flexible diethanolamine moiety. The chiral compound is an already known good organog…
The rational chemical modification of carbon nanotubes (CNT) is crucial for their successful application in various areas of science and industry. In our approach, Birch reduction of single-walled carbon nanotubes (SWCNT) was followed by epoxidation with dimethyldioxirane (DMDO). Next, ring-opening reactions with thio…
Al doped zinc oxide (ZnO:Al) is a transparent and conductive oxide used as contact and antireflection layer in solar cell based on Si or chalcogenide. Generally it is grown by magnetron sputtering but the resistivity of our films grown with this technique are still in the order of 10 -3 Ωcm for layers grown at the tem…