Materials Literature
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The surface plasmon resonance (SPR) optical absorption of Ag nanoparticles loaded in mesoporous SiO 2 (with fairly low Ag content, about 0.14 wt %) have been investigated after the nanoparticles were heated in or exposed to various atmospheres (i.e., air, H 2, water vapor, Ar, and H 2 S). Unexpectedly, the SPR optical…
The presence of additives has demonstrated strong effects on the crystallization and morphology of calcium carbonate (CaCO3). To understand the mediating function of alginate on the growth of CaCO3, we design a novel method to add alginate molecules and inorganic ions mildly and continuously to the mineralization syst…
Single- and oligo-crystalline magnetic shape memory (MSM) Ni45.2Mn36.7In13Co5.1 particles were prepared by mechanical grinding the melt-spun ribbons. The influence of annealing and grinding on the crystal structure and magnetic properties of the ribbons and particles was systematically investigated. The obtained Ni45.…
High-density polyethylene (PE) foils were modified by an Ar(+) plasma discharge and subsequent grafting with biomolecules, namely glycine (Gly), polyethylene glycol (PEG), bovine serum albumin (BSA), colloidal carbon particles (C) or BSA and C (BSA + C). As revealed by atomic force microscopy (AFM), goniometry and Rut…
The coupling of a quantum emitter to the modes of a silica toroid is presented. A fiber taper is used to manipulate and transfer a preselected diamond nanocrystal onto the toroid. Optical coupling of few nitrogen vacancy (NV) color centers contained inside the nanocrystal to the resonator modes is demonstrated by dete…
We present a theoretical and numerical analysis of liquid surface waves (LSWs) localized at the boundary of a phononic crystal consisting of split-ring resonators (SRRs). We first derive the homogenized parameters of the fluid-filled structure using a three-scale asymptotic expansion in the linearized Navier-Stokes eq…
Gilded rafts: Oligomeric 2D raft clusters {M[m]}n (M=Cu, n=3; M=Ag or Au, n=4; see picture) with the same bridging metalloligand [m]={CpMo(CO)3} were prepared and structurally characterized. The ν2-triangular (M=Cu) or ν2-square (M=Ag, Au) structures of their metal–metal-bonded cores allow comparative evaluation of th…
ZrB 2 —20 vol.% SiC ceramics with additional 20 vol.% short carbon fibers were developed to promote graceful failure using hot-pressing technique. The influence of short carbon fiber on the strength, and modulus of composite was analyzed and estimated using a modified rule of mixtures. The calculation results showed t…
A dielectric subwavelength diffraction grating structure is designed and fabricated in order to enhance fluorescence-based detection of biomolecules. Two separate phenomena, enhancement of the local energy densities of the excitation illumination and direction of the emitted signal toward the detector, are examined th…
In this paper, we present Förster resonance energy transfer (FRET)-enhanced color-conversion using colloidal semiconductor quantum dot nanocrystals (NCs) to make reddish-orange light-emitting diodes for use in ultraefficient solid state lighting. To achieve FRET enhancement at 614 nm, we use an energy gradient hybrid…
The dynamics of photoinduced phase transition in spin-crossover materials is studied using numerical simulations of a microscopic two-variable anharmonic model, in close connection with photocrystallographic experiments on the prototype system $[\text{Fe}{(\text{btr})}_{2}{(\text{NCS})}_{2}].{\text{H}}_{2}\text{O}$. A…
Model-based infrared reflectrometry (MBIR) has been introduced recently for characterization of high-aspect-ratio deep trench structures in microelectronics. The success of this technique relies heavily on accurate modeling of trench structures and fast extraction of trench parameters. In this paper, we propose a mode…
Using home-built dedicated ray-tracing software, we simulate photorealistic images of sceneries in three dimensions including dielectric carpet cloaks--i.e., continuously varying refractive-index distributions that allow for invisibility cloaking of a bump in a metallic carpet. Results for the ideal and for a simplifi…
Mesoporous poly(styrene) (PS) containing various amounts of the cross-linker divinylbenzene was synthesized by a hard-templating routine using pressed pellets of fumed silica as templates. Porous polymers with a surface area of 215 m 2 g −1 and porosities up to ∼35 vol % could be obtained. The impact of the cross-link…
Funktionelle Innenräume: Riesige ringförmige {Mo154}-Polyoxometallat-Clusteranionen werden durch Zusatz von Dimethyldioctadecylammonium(DODA)-Kationen stabilisiert. Die Cluster können in ihrem nanoskaligen Innenraum Gase und Dämpfe adsorbieren, und sie wirken außerdem als wasserunempfindliche feste Säurekatalysatoren…
The effects of surface energy on the wetting transition for impinging water droplets were investigated on the chemically modified WOx nanowire surfaces. We could modify the surface energy of the nanowires through chemisorption of alkyltrichlorosilanes with various carbon chain lengths and also by the ultraviolet-enhan…
Dissipative particle dynamics simulations are applied to study nanoparticle targeting to a cell surface containing a high concentration of receptors. We found that the normalized number of bound ligands follows an exponential growth function 1 - exp(-t/tau), with the lifetime tau increasing as a function of the bindin…
A fine tuning of the electrical conductivity from insulator to conductor behavior has been obtained for a multiwalled carbon nanotubes epoxy composite at a fixed substatistical percolation threshold content by varying the organization of the nanotubes network. A multiscale characterization has been carried out by tran…
The ferromagnetic response from Co-doped CeO2 epilayers is shown to be linked to the formation of Co metallic nanowires (diameters in the 3–7 nm range) within the oxide matrix. These results (i) illustrate the key role of the shape anisotropy of metallic inclusions in diluted magnetic oxides (DMO), (ii) stress the imp…
Magnesium borate hydroxide (MBH) nanowhiskers were synthesized using a one step hydrothermal process with different surfactants. The effect surfactants have on the structure and morphology of the MBH nanowhiskers has been investigated. The X-ray diffraction profile confirms that the as-synthesized material is of singl…