Materials Literature
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Few layer graphene (FLG) is grown on single crystal Cu(111) by Chemical Vapor Deposition, and the electronic valence band structure is imaged by Angle-Resolved Photo-Emission Spectroscopy. It is found that graphene essentially grows polycrystalline. Three nearly ideal Dirac cones are observed along the Cu Γ¯K¯ directi…
We developed an analytical relationship between nuclear magnetic relaxation and interparticle spacings in polymer nanocomposites filled with paramagnetic-impurity-containing clay nanoparticles. Using (1)H NMR relaxometry, clay nanoparticle dispersion was quantified and agrees with interparticle spacing distributions d…
We report a transfer-matrix parameter retrieval method for extracting the dielectric constant of Ag film obtained by using a shadowing vapor deposition technique. The as-deposited Ag film, being amorphous/porous, exhibits higher losses as compared to a solid film. Using the retrieved dielectric constant for the as-dep…
The effect of strain on the thermal transport across grain boundaries in graphene is investigated using molecular dynamics simulations. The thermal boundary conductance is found to decrease significantly under biaxial tension as expected. In contrast, under biaxial compression, the thermal boundary conductance is stro…
Anisotropic CdS nanorods tipped by Au nanoparticles on one edge (Au‐CdS‐NRs) are perpendicularly oriented at the air/water interface, whereby all the Au tips are located in the subphase, using the Langmuir–Blodgett technique. Since these nano‐objects reveal light‐induced charge separation at the semiconductor/metal in…
In this work, we describe a new method for inking elastomeric stamps with graphene for transfer printing. We demonstrate transfer printing of continuous films using this method with graphene and a composite graphene/alumina film. Electrical transport measurements are presented showing significant improvement in curren…
Two new complexes, [(bpy)2Ru(dpp)Rh(I)(COD)](PF6)3 and [(Me2bpy)2Ru(dpp)Rh(I)(COD)](PF6)2(BF4) (bpy = 2,2'-bipyridine, Me2bpy = 4,4'-dimethyl-2,2'-bipyridine, dpp = 2,3-bis(2-pyridyl)pyrazine, and COD = 1,5-cyclooctadiene), representing a new Ru(II),Rh(I) structural motif, have been prepared and characterized by mass…
We present macroscopic and neutron diffraction data on multiferroic lightly Co-doped Ni${}_{3}$V${}_{2}$O${}_{8}$. Doping Co into the parent compound suppresses the sequence of four magnetic phase transitions, and only two magnetically ordered phases---the paraelectric high-temperature incommensurate (HTI) phase and t…
In natural fibre based-composites, the interfaces within the fibre bundles are not as well described as those between fibres and classical polymer matrices. To compensate for this lack of information, which is however of great importance when trying to model the composite behaviour, morphological and mechanical charac…
We report low-temperature magnetoconductance measurements of a patterned two-dimensional electron system at the surface of strontium titanate, gated by an ionic liquid electrolyte. We observe universal conductance fluctuations, a signature of phase-coherent transport in mesoscopic devices. From the universal conductan…
Tunneling between two parallel, two-dimensional electron gases (2DEGs) in a complex oxide heterostructure containing a large, mobile electron density of ∼3 × 1014 cm−2 is used to probe the subband structure of the 2DEGs. Temperature-dependent current-voltage measurements are performed on SrTiO3/GdTiO3/SrTiO3 junctions…
The heterostructure composed of Pr0.65(Ca0.75Sr0.25)0.35MnO3 and 0.7 wt. % Nb-doped SrTiO3 was fabricated. The heterostructure exhibits an asymmetric current-voltage relation similar to that of p-n junctions and an obvious photovoltaic effect with its maximum value of about 25.1 mV at T = 140 K. It is interesting that…
The average energy density of the macroscopic quasimonochromatic electromagnetic field U ts (t, r) in a linear passive chiral lossy medium described by the constitutive E-H relations is determined using a microscopic model.According to the model, U ts (t, r) is equal to the sum of the average energy densities of the e…
Using room-temperature molecular beam epitaxy on Si(111), we demonstrate Heusler-alloy bilayers consisting of L21-Co2FeSi (CFS) and D03-Fe3Si (FS). By fabricating lateral spin valves with L21-CFS and D03-FS electrodes, we can see ideal spin signals even though we use one L21-CFS as a spin injector and another D03-FS a…
Synchrotron x-ray diffraction and electrical resistivity were used to probe the electronic phase transition in two strained La1/3Sr2/3FeO3 films on (001) SrTiO3 substrates, one nominally stoichiometric and one with a higher concentration of oxygen vacancies. We present evidence that oxygen vacancies inhibit the size o…
Acrodur solution and dispersion have been developed as alternative wood adhesives to phenolic and urea formaldehyde resins. They are non-corrosive and do not emit carcinogenic gases. Contrary to most resins used in natural plant fibre composites, Acrodur has superior tolerance to moisture during composite fabrication…
This paper investigates for the first time, the energy-absorbing characteristics of a range of lightweight bamboo-reinforced foam structures. Initial attention focuses on characterizing the energy-absorbing characteristics of the individual bamboo tubes and assessing the influence of tube geometry on energy absorption…
This paper studies the buckling problem of nanowires (NWs) and carbon nanotubes (CNTs) freely standing on a substrate and subjected to distributed axial loads. NWs and CNTs are modeled as elastic nanocolumns and due to their high Young's modulus, the substrate is reasonably considered as an elastic foundation. The jun…
CeO2/Sm2O3 multilayer films were deposited on p-type Si wafers by e-beam evaporation technology. Four typical photoluminescence peaks of Sm3+ ions located around 572, 615, 656, and 719 nm were observed after the samples were annealed in an oxidizing atmosphere at high temperature. The luminescence properties of CeO2:S…
An investigation was carried out on the noncross-linked low-density polyethylene (LDPE) nanocomposite foams with polyethylene graft maleic anhydride (PE-g-MA) compatibilizer. Nanocomposite foams with similar densities were produced by extrusion method, and the effect of organophilic montmorillonite (OMMT) nanoclay (cl…