Gold contact to individual metallic carbon nanotubes: A sensitive nanosensor for high-pressure
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Polarized Raman spectroscopic study of relaxed high density amorphous ices under pressure
We have made high density amorphous ice (HDA) by the pressure-induced amorphization of hexagonal ice at 77 K and measured the volume change on isobaric heating in a pressure range between 0.1 and 1.5 GPa. The volume of HDA on heating below ∼0.35 GPa increases, while the volume of HDA on heating above ∼0.35 GPa decreas…
Effect of epoxidized natural rubber on the processing behavior, tensile properties, morphology, and thermal properties of linear‐low‐density polyethylene/soya powder blends
Abstract The effect of epoxidized natural rubber (ENR) with 50 mol% epoxidation (ENR 50) on the processing behaviors, tensile properties, morphology, and thermal properties of linear‐low‐density polyethylene (LLDPE)/soya powder blends was investigated. The LLDPE was blended with various soya powder contents in a Haake…
Coexistence of localized and itinerant electronic states in the multiband iron-based superconductorFeSe0.42Te0.58
We report X-band electron paramagnetic resonance (EPR) and $^{125}\text{T}\text{e}$ and $^{77}\text{S}\text{e}$ NMR measurements on single-crystalline superconducting ${\text{FeSe}}_{0.42}{\text{Te}}_{0.58}$ $[{T}_{c}=11.5(1)\text{ }\text{K}]$. The data provide indications for the coexistence of intrinsic localized an…
Haldane Phases and Ferrimagnetic Phases with Spontaneous Translational Symmetry Breakdown in Distorted Mixed Diamond Chains with Spins 1 and 1/2
The ground states of two types of distorted mixed diamond chains with spins 1 and 1/2 are investigated using exact diagonalization, DMRG, and mapping onto low-energy effective models. In the undistorted case, the ground state consists of an array of independent spin-1 clusters separated by singlet dimers. The lattice…
Structural phase transition in the spin-crossover complex[Fe(ptz)6](BF4)2studied by x-ray diffraction
The spin-crossover system $[\text{Fe}{(\text{ptz})}_{6}]{({\text{BF}}_{4})}_{2}$ has been studied for more than 25 years and is used as a model system to the understanding of the eponymous phenomenon in solid-state materials. However, the structural properties of the low-spin phase formed at low temperature after a sl…
Modeling and Performance Analysis of the Rolls-Royce Fuel Cell Systems Limited: 1 MW Plant
This paper is focused on the performance of the 1 MW plant designed and developed by Rolls-Royce Fuel Cell Systems Limited. The system consists of a two stage turbogenerator coupled with pressure vessels containing the fuel cell stack, internal reformer, cathode ejector, anode ejector, and off-gas burner. While the ov…
CO2 Gas Transport Properties of Nanocomposites Based on Polyhedral Oligomeric Phenethyl-Silsesquioxanes and Poly(bisphenol A carbonate)
Polymer-based nanocomposites were prepared by solution blending of polyhedral oligomeric silsesquioxane with phenethyl substituents (PhenethylPOSS) into poly(bisphenol A carbonate) (PBAC). First investigations focused on structure, morphology and dynamics, addressed mainly by dielectric relaxation spectroscopy are sub…
Correlation between second-order optical response and structure in thermally poled sodium niobium-germanate glass
We have carried out Raman and second harmonic generation (SHG) measurements to probe thermal poling-induced phenomena in glass 20Na2O-80[0.35Nb2O5-0.65GeO2]. A SHG response of 0.6 pm/V was measured after poling in a ∼3 μm thick layer under the anode and found to deviate from the widely used electric field-induced SHG…
Self-biased planar millimeter wave notch filters based on magnetostatic wave excitation in barium hexagonal ferrite thin films
The use of M-type barium hexagonal ferrite (BaM) thin films for self-biased planar millimeter wave notch filters was demonstrated for the first time. The BaM film was grown by pulsed laser deposition and showed a remanent to saturation magnetization ratio of 0.99 and a 60 GHz ferromagnetic resonance linewidth of about…
Fabrication of Two Kinds of Polymer Microspheres Stabilized by Modified Titania during Pickering Emulsion Polymerization
Abstract Two kinds of PS microspheres with different structures are prepared in one reaction system via Pickering emulsion polymerization. As the stabilizer, titania nanoparticles are modified by oleic acid or sodium oleate and then investigated using aqueous electrophoresis measurements, DLS and oil/water partitionin…
Nucleation Effect of Layered Metal Phosphonate on Crystallization of Bacterial Poly[(3‐hydroxybutyrate)‐co‐(3‐hydroxyhexanoate)]
Abstract The nucleating effect of zinc phenylphosphonate (PPZn) was investigated on the as‐bacterially synthesized poly(3‐hydroxybutyrate) [P(3HB)] and poly[(3‐hydroxybutyrate)‐ co ‐(3‐hydroxyhexanoate)]s [P(3HB ‐co‐ 3HHx)s] in order to improve their crystallization rate. PPZn is found an efficient nucleating agent on…
Surface Modification of Titanium with Heparin-Chitosan Multilayers via Layer-by-Layer Self-Assembly Technique
Extracellular matrix (ECM), like biomimetic surface modification of titanium implants, is a promising method for improving its biocompatibility. In this paper chitosan (Chi) and heparin (Hep) multilayer was coated on pure titanium using a layer-by-layer (LbL) self-assembly technique. The Hep-Chi multilayer growth was…
Coherent optical phonon spectroscopy studies of femtosecond-laser modified Sb2Te3 films
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Yuwei Li, Vladimir A. Stoica, Lynn Endicott, Guoyu Wang, Ctirad Uher, Roy Clarke; Coherent optica…
Site-Selective Lanthanide Doping in a Nonanuclear Yttrium(III) Cluster Revealed by Crystal Structures and Luminescence Spectra
A series of lanthanide-doped nonanuclear yttrium(III) clusters with general formulas (Y(9-x)Ln(x))(acac)(16)(μ(3)-OH)(8)(μ(4)-O)(μ(4)-OH) (Ln = Pr, Eu, Tb, Dy, and Yb) were synthesized. Characterization by single-crystal X-ray diffraction allowed for analysis of relative populations of yttrium (Z = 39) and dopant triv…
Tilted-Cone Induced Cusps and Nonmonotonic Structures in Dynamical Polarization Function of Massless Dirac Fermions
The polarization function of electrons with the tilted Dirac cone found in organic conductors is studied using the tilted Weyl equation. The dynamical property is explored based on the analytical treatment of the particle-hole excitation. It is shown that the polarization function as the function of both the frequency…
Spontaneous crystal growth of co-crystals: the contribution of particle size reduction and convection mixing of the co-formers
Previously reported methods for co-crystal synthesis have employed a variety of strategies and these include co-grinding, co-precipitation, growth from the solution, melt and slurry (M. Zaworotko, Polymorphism in Co-crystals and Pharmaceutical Co-crystals, XX Congress of the International Union of Crystallography, Flo…
Coherence Effect of Sign-Reversing s±-Wave Cooper Pair State in Heavily Overdoped LaFeAsO-based Superconductor: 75As-Nuclear Quadrupole Resonance
We report an 75As-nuclear quadrupole resonance (NQR) study on heavily electron-doped LaFeAsO_1-xF_x(La1111) with Tc=5 K. Nuclear spin relaxation rate (1/T1) measurement has revealed that a Hebel-Slichter (HS) peak partially recovers in heavily electron-overdoped regimes where the nesting condition of hole and electron…
Investigation of high frequency performance limit of graphene field effect transistors
Extremely high field effect mobility together with the high surface coverage makes graphene a promising material for high frequency electronics application. We investigate the intrinsic high frequency performance limit of graphene field effect transistors limited by the charge impurity scattering. The output and trans…
Synthetic, Structural, Photophysical and Computational Studies on π‐Conjugated 1,3,2‐Benzodiazaboroles with Carbazole Building Blocks
Abstract The reaction of the N ‐lithiated 3,6‐di‐ tert ‐butyl‐carbazole ( 2 ) with 2‐bromo‐1,3‐diethyl‐1,3,2‐benzodiazaborole ( 1a ) and 2‐bromo‐1,3‐diphenyl‐1,3,2‐benzodiazaborole ( 1b ) afforded the 2‐ N ‐carbazolyl‐functionalized benzodiazaboroles 3a and 3b as colourless solids in 77 and 73 % yield, respectively.Sy…