Materials Literature
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Ferrocence and its derivatives have long been known to be a class of stable organometallic compounds, and their dissociation usually occurs under harsh conditions. Here we report a new type of ferrocene derivatives, 4,4-difluoro-8-ferrocenyl-1,3,5,7-tetramethyl-4-bora-3a,4a-diaza-s-indacene and 4,4-difluoro-2,6-diethy…
The crystallographic lattice constants and superconducting critical temperatures of FeSe 0.5 Te 0.5 thin films grown on oxide substrates have been found to have no dependence on the in-plane lattice constants of the substrates. However, a correlation between various structural and transport properties of the films and…
A Mach-Zehnder type electro-optic (EO) modulator based on novel organic-inorganic hybrid nonlinear optical materials attached with Disperse Red 19 has been successfully designed and fabricated. The new material system presents a smartly controlled process to overcome the EO effect stability tradeoff of conventional EO…
Tympanic membrane (TM) perforation is still one of the most common otology complications. New designs of biomaterials, and lately tissue-engineered composites and grafts, have thoroughly revolutionized the management of TM perforation. In this study, we examined a biologically modified collagen-immobilized polydimethy…
Dissipative particle dynamics (DPD) simulation is employed to examine the self-assembly of π-shaped copolymers possessing rigid backbones (rod blocks A) and two flexible (coiled) side chains B in a selective solvent. The dependence of the morphologies of the nanostructures generated on the positions of the junction po…
Stereographic projection is one of the most powerful research tools for crystallography in materials science. A new program for full operation of stereographic projections and in-depth exploration of crystallographic orientation relationships is described. It is specifically designed for materials researchers who are…
We report direct measurements of poly(ethylene oxide) (PEO) mediated depletion attraction between colloids and surfaces using total internal reflection microscopy (TIRM) and in quasi-2D colloidal phase behavior using video microscopy (VM). PEO concentration dependent particle-wall depletion attraction is accurately qu…
Photoreactive surfaces derived from a new photocleavable surface modification agent and with photosensitivity in the Vis and IR region are described. A ruthenium(II) caged aminosilane, [Ru(bpy)(2)(PMe(3))(APTS)](PF(6))(2), was synthesized and attached to silica surfaces. Light irradiation removed the cage and generate…
The grain size dependence of the superconducting transition, the normal state resistivity, and the insulating behavior at high magnetic fields are studied on a series of boron-doped nanocrystalline diamond (B:NCD) thin films with different grain sizes. The systematic change of the grain size is achieved by varying the…
Theoretical and computational studies of polymer nanocomposites have largely focused on spherical inclusions in a polymer matrix. In order to address the influence of particle shape on nanocomposite behavior, extensive Monte Carlo and molecular dynamics simulations are used to examine the structure and deformation beh…
Ceria (CeO 2 ) nanocrystals have unique and highly attractive properties that depend on the morphology and structure. In this paper, we demonstrate that by controlling the addition of copper to growing ceria nanocrystals it is possible to modulate the resulting structure properties. We show also by means of X-ray diff…
Dynamic high-fidelity magnetic equivalent circuits (HFMEC) are viable tool for accurate, physics-based modeling of magnetic components. However, such model formulation typically requires hundreds or thousands of state variables to accurately represent the eddy current dynamics. A reduced-order HFMEC modeling approach…
A miniscule amount of f-SWNTs remarkably improved (~17-fold) the gelation efficiency of amphiphilic molecules by triggering the formation of interconnecting self-assembled fibrillar networks (SAFIN) in supramolecular gelation.
Carrier retention and recombination in Si quantum dots (Si-QDs) embedded SiNx light emitting diode with dark-yellow emission of 93 nW and linear P-I slope of 1.2 mW/A at 80 μA bias are compared. The capacitance-voltage hysteresis of <0.5 V reveals low carrier density per Si-QD, and the 1 ms charge retention concludes…
Here, we present the catalytic conversion of graphene layers into carbon nanotubes (CNTs), in the presence of Au nanoparticles (AuNPs) without the need for an additional carbon source. We have demonstrated that this catalytic process takes place at temperatures as low as 500 °C. No other oxide supports decorated with…
The substituted metal ions in the hexaaluminate structure are regarded as active centers, but their very limited substituted content prevents the obtainment of higher activity. Fe-substituted hexaaluminates exceptionally overcome such a limit. In this paper, we have studied the Fe crystallographic sites in BaFe x Al 1…
In this work, we report on the synthesis and the electrical properties of ZnO nanoparticles, which differ in their organic shell. The introduction of a 2-ethylhexanoate shell instead of a common acetate shell has an impact on the accessible size of the ZnO nanoparticles and changes the electrical properties of thin fi…
Optical absorption (OA), magnetic force microscopy (MFM), and photoluminescence (PL) measurements were employed to study Cd(1-x)Mn(x)S nanoparticles (NPs), grown in a glass matrix, at different x-concentrations. The formation of two well defined groups of NPs with different sizes was detected by OA spectra at room tem…
Wurtzite–zinc blende (WZ–ZB) polytypic ZnxCd1−xSe layers were deposited on a ZnO nanowire array with full composition tuning by the chemical vapor transport method. As the composition tuned, three distinctive WZ–ZB polytypic structures appear. (1) At x = 0.2–0.3, the WZ and ZB domains exist separately in the inner and…
This work examines the electronic energy-transfer (EET) processes inherent to a molecular dyad in which aryl polycycles attached to a boron dipyrromethene (Bodipy) dye act as ancillary light harvesters for near-UV photons. The solvent, being methyltetrahydrofuran, is compressed under applied pressure to such an extent…