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Spherical active coated nano-particles comprised of a silica nano-cylinder core covered with a plasmonic nano-shell are investigated with regard to their near- and far-field properties. The source of excitation is taken to be that of a tangential or a radial electric Hertizan dipole while three different plasmonic materials are employed for the nano-shells, namely silver, gold and copper.
A material-specific dual-color common-path interferometric detection system for discriminating between nanoparticles in solution in real time is described. The detection technique is applicable to situations where both particle size and material are of interest.
The nonlinear response of silica-gold-nanoshells (SGNS) in chloroform was studied at 1560nm, and an analytical approach that allowed extraction of the third- and the fifth-nonlinear susceptibility of a SGNS from the data is presented.
We propose a new magnetically tunable color changing material and its operation method which enable both color generation and change within a single material. To achieve this, we fabricated micro-sized magnetic nanocomposite actuators for a single color changing unit and assembled them on the substrate. This method offers very simple fabrication and operation of color changing surface with high resolution.
Raman spectroscopy has been one of the most sensitive techniques widely used in chemical and pharmaceutical research. With the latest development of surface enhanced Raman scattering (SERS) nanoparticles, the application now can be extended to bioimaging and biosensing. In this study, we demonstrate the ability of Raman spectroscopy to separate multiple spectral fingerprints using Raman nanotags after...
Calcium carbonate nanopowder is an important engineering material used for various painting and polymer-based composite additive and filler. The hydrophobic modification on surface of calcium carbonate nanopowder was performed by using three silane coupling agents: i.e. 3-Aminopropyl triethoxysilane (APTES), 3-mercapto-propyl triethoxysilane (MPTES) and 3-ATRP trimethoxysilane (KH570). The Fourier...
In anticipation of a possible future breakthrough in developing metamaterials with at least a factor of 10 lower losses we analyze in this paper different resonant and nonresonant structures and the achievable performance. One example is waveguides made from arrays of near resonantly operated near-field coupled metal nanoparticles in the shape of e.g. spheres, which have attracted some attention....
As a kind of middle-temperature PCM (Phase Change Material), paraffin is perfect except for its poor thermal conductivity. Nano-aluminum, which has high thermal conductivity and good compatibility, was added into paraffin to improve its thermal conductivity. Surface modified technology was adopted and dispersant was used to prepare uniform and stable organic phase-change nano-fluid of paraffin and...
An analytical study of artificial materials created by embedding spherical nano-particles in an infinite homogenous medium is presented in this paper. Propositions by various contributors to this area of the nanomaterials' field have been compared with respect to their approaches in finding the effective constituent parameters, over wide frequency ranges. Their closed form equations were examined...
The importance of the development of high-end computers (HEC) lies in their ability to solve complex problems in many areas of science and engineering. In order to develop the next generation of HEC faster buses are required. However, faster buses cannot be achieved in a cost-effective way by means of further scaling of today's electrical technology. Some of the parameters that prevent this further...
Magnetic metal alloy particles of CoFe2 were grown by chemical method and the crystalline phase was confirmed by X-ray diffraction pattern. The thin film of dimensions 10mm × 10mm × 100nm (length x breadth x thickness) of this material was developed using vacuum vapour deposition technique. The V-I measurements of the thin film was done at different temperatures in the range...
This paper presents the synthesis and characterization of magnetite particles (covered and stabilized with mercaptoetnol) functionalized with invertase, using cyanuric chloride as spacer. The above synthesized materials were structurally characterized using Scanning Electron Microscopy, FT-IR spectroscopy, thermal analysis.
An investigation of the scintillation response of rare earth doped fluoride nanoparticles was carried out taking advantage of core/multi-shell structures. A significant enhancement of the scintillation response was observed and attributed to the increase of the volume of the nanoparticles. Larger nanoparticles contain larger fractions of the irradiation cascade, their dimensions approach the electron-hole...
ZnS:Mn nanoparticles of different size have been synthesized using a co-precipitation method. So-prepared ZnS:Mn nanoparticles with capping agent (oleic acid) then were characterized using X-ray diffraction(XRD) and UV-Vis spectroscopy. The particle size of the nanoparticles calculated from the XRD patterns has been found in the range 1.45-2.65nm. Absorption spectra have been obtained using UV-Vis...
We report an experimental investigation into the controlled fabrication of metallic nanospheres on the tip of nanotubes. The fabrication process, nanobubbling, is based on nanofluidic mass delivery at the attogram scale using metal-filled carbon nanotubes (CNTs). Two methods have been investigated including electron-beam-induced bubbling (EBIB) and electromigration-based bubbling (EMBB). Under the...
Aimed at the problem solving of difficult reclaiming nanometer TiO2, the paper conducts a study on magnetic recovering by a series of experiments. Firstly, taking methylene blue as the object, the test compares the photocatalytic performance between self-manufactured TiO2 and commercial TiO2 after 160 minutes photocatalytic degradation. The results show that their degradation rates are 94% and 99%...
Eu/SiO2 Nanoparticles was prepared through sol-gel method. The gel was synthesized through the hydrolysis of a complex solution of containing tetramethoxy-silicane (TMOS) and EuCl3·6H2O. X ray diffraction analysis showed that that there are crystalline materials appeared in the amorphous SiO2. The fluorescence spectroscopic analysis showed that the Eu/SiO2 fluorescence peaked at 590 nm with excitation...
Reactive oxygen species (ROS) and activation of redoxsensitive transcription factors such as nuclear factor (NF)-κB have been implicated in pro-inflammatory responses induced by nanoparticles. However, there is still only little knowledge about the pro-inflammatory responses induced by multi-walled carbon nanotubes (MWCNTs). The objective of the present study was to compare the ability of MWCNTs and...
Tobermorite is a mineral material with good ion exchange properties. The potassium feldspar ore from Lushi country is muscovite syenite. Potassium feldspar was hydrothermally decomposed with CaO as an additive, and then tobermorite nano-scale powder was synthesized. Based on the research work of our group, the adsorption property of tobermorite to Pb2+ from aqueous solution was studied. The factors...
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