Materials Literature
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In this work, we demonstrate a unique and facile methodology for the homogenous and stable p-type doping of graphene by hybridization with ZnO thin films fabricated by MeV electron beam irradiation (MEBI) under ambient conditions. The formation of the ZnO/graphene hybrid nanostructure was attributed to MEBI-stimulated…
We have studied quantum interference between electrons and holes in a split-ring gold interferometer with graphene arms, one of which contained a $pn$ junction. The carrier type, the $pn$ junction, and the phase of the oscillations in a magnetic field were controlled by a top gate placed over one of the arms. We obser…
Surface doping can be a powerful way to modify the electronic properties of graphene with the unique potential to retain the excellent pristine properties of graphene. Here, we report an atomic surface doping method for graphene via dissociation of adsorbed precursor molecules of tetrafluorotetracyanoquinodimethane (F…
The Tm(3+) chelate of DOTAM [1,4,7,10-tetrakis(carbamoylmethyl)-1,4,7,10-tetraazacyclododecane] possessing sterically demanding t-butyl amide substitution favors TSAP geometry. This chelate displayed a paraCEST signal associated with the highly shifted amide proton signal at approximately -100 ppm that was beyond the…
We report on the ultrafast carrier dynamics in hydrogenated nanocrystalline silicon (nc$\ensuremath{-}$Si:H) using time-resolved terahertz spectroscopy. Photoexcitation at 407 nm primarily produces charge carriers in the $a\ensuremath{-}$Si phase, but they undergo a rapid electron transfer to the $c\ensuremath{-}$Si p…
Abstract Different concentrations of metal chlorides/polyvinyl alcohol nanocomposites have been prepared by the typical solvent cast technique. The prepared samples were investigated by different techniques such as X‐ray diffraction, differential scanning calorimetry, and scanning electron microscope. DC and AC conduc…
With the recent upsurge in experimental efforts toward fabrication of short-channel graphene field-effect transistors (GFETs) for analog and high-frequency RF applications-where the advantages of distinctive intrinsic properties of gapless graphene are expected to be leveraged-a critical understanding of the factors a…
Using UV light to expose a homogeneous cell containing liquid crystal (LC)/monomer mixture through a patterned photomask, we prepared a polymer network liquid crystal (PNLC) microlens array. In each microlens, the formed polymer network presents a central-symmetrical inhomogeneous morphology and LC exhibits a gradient…
We report the Hall effect measured in gold films evaporated onto mica substrates, the samples having an average grain diameter D that ranges between 12 and 174 nm, and a thickness t of approximately 50 nm and 100 nm. The Hall mobility was determined at low temperatures T (4 K ≤ T ≤ 50 K). By tuning the grain size duri…
Tunnel electroresistance properties have been investigated at the nanoscale for prototype magneto-electric tunnel junctions (METJ) consisting of ferroelectric BaTiO3 and ferromagnetic La0.67Sr0.33MnO3 heterostructures. Combining piezoresponse force and conductive atomic force microscopy, we demonstrate robust and repr…
The magnetization measurements at 5 K were carried out for Ni2Mn1 − xCuxGa (0 ≤ x ≤ 0.40) and Ni2MnGa1 − yCuy (0 ≤ y ≤ 0.25) alloys. All of the magnetization curves are characteristic of ferromagnetism or ferrimagnetism. By using Arrott plot analysis the spontaneous magnetization of all samples was determined from the…
The interplay between spin and lattice degrees of freedom in the spinels CoCr${}_{2}$O${}_{4}$ and CdCr${}_{2}$O${}_{4}$ has been investigated by heat capacity and thermal expansion measurements. In CoCr${}_{2}$O${}_{4}$, sharp anomalies are observed at the magnetic phase transition temperatures of 13, 26, and 93 K. A…
COSMO-SAC model and its evolutions have been investigated for solubility prediction of six pharmaceutical ingedients (ibuprofen, paracetamol, benzoic acid, salicylic acid, 4-aminobenzoic acid, and anthracene) in 35 solvents. The aim is to check the relevancy of the last improvements of the COSMO-SAC method for solubil…
Hybrid composites are characterized by a variety of properties that are of interest to automotive applications, including strength, mechanical, and thermal properties. In this work, palm kernel shell-filled maleated polypropylene composites and palm kernel shell/nanosilica-filled maleated polypropylene hybrid composit…
Electrical conductivities of thin films of silicon nanocrystals (4–6 nm) exhibit high sensitivity to water vapor. Specifically, water adsorption on the surface of silicon nanocrystals films increases their electrical conductivity by a factor of 4 at room temperature and an order of magnitude at 175 K. The increase in…
Abstract Various copolyesters of lactide, isosorbide, and terephthalic acid are prepared by a two‐step process performed in a “one‐pot” procedure, beginning with an isosorbide‐initiated oligomerization of L ‐lactide followed by polycondensation with terephthaloyl chloride using SnCl 2 as a catalyst for both steps. The…
We propose and analyze a technique to collectively enhance interactions between solid-state quantum registers composed from random networks of spin qubits. In such systems, disordered dipolar interactions generically result in localization. Here, we demonstrate the emergence of a single collective delocalized eigenmod…
We demonstrate that thermal annealing in cation controlled environments is an effective means to obtain atomically flat and chemically single terminated surfaces of a layer structured substrate. The effectiveness of the cation controlled annealing method is proved with SrLaAlO4, which is a representative layer structu…
It is experimentally found that the Eb(d) = γ · d−ξ law describing the thickness-dependent breakdown electric field for solid dielectrics at ambient conditions can be extended for dielectrics in other thermodynamic states. It follows from the experimental results reported herein that the breakdown field, Eb(d), of Pb(…
A T-type method is developed to comprehensively evaluate the thermoelectric properties of materials. The thermoelectric properties, including thermal conductivity, thermopower, and electrical conductivity of an ultralong double-walled carbon nanotube bundle are studied from 240 K to 340 K by applying the T-type method…