Materials Literature
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We study the process of graphene growth on Cu and Ni substrates subjected to rapid heating (approximately 8 °C/s) and cooling cycles (approximately 10 °C/s) in a modified atmospheric pressure chemical vapor deposition furnace. Electron microscopy followed by Raman spectroscopy demonstrated successful synthesis of larg…
The influence of annealing above the glass transition temperature (T(g)) on chain entanglement and molecular dynamics of solution-cast poly(methyl methacrylate)/poly(styrene-co-maleic anhydride) (PMMA/SMA) blends was investigated via a combination of dynamic rheological measurement and broadband dielectric spectroscop…
We present heat capacity, $c$-axis thermal expansion and pressure-dependent, low-field, temperature-dependent magnetization for pressures up to $\ensuremath{\sim}12$ kbar, data for KFe${}_{2}$As${}_{2}$ single crystals. ${T}_{c}$ decreases under pressure with $d{T}_{c}/dP\ensuremath{\approx}\ensuremath{-}0.10$ K/kbar.…
Abstract High glass transition temperature poly(N‐cyclohexyl‐5‐norbornene‐2,3‐dicarboximide)s (NDI)s prepared by ring opening metathesis polymerization yielded polymers with a narrow polydispersity and well‐controlled molecular weight materials when using the Grubbs first generation initiator. Polymers produced using…
A millimeter-sized ThCr${}_{2}$Si${}_{2}$-type CeNi${}_{2}$As${}_{2}$ single crystal was synthesized by the NaAs flux method and its physical properties were investigated by magnetization, transport, and specific-heat measurements. In contrast to the previously reported CaBe${}_{2}$Ge${}_{2}$-type CeNi${}_{2}$As${}_{2…
We develop the method proposed by Chernyshuk and Lev [Phys. Rev. E 81, 041701 (2010)] for theoretical investigation of elastic interactions between colloidal particles of arbitrary shape and chirality (polar as well as azimuthal anchoring) in the confined nematic liquid crystal (NLC). General expressions for six diffe…
In the present study, synthesis and decomposition of zinc hydroxynitrates, i.e., Zn(NO 3 )(OH)·H 2 O, Zn 5 (NO 3 ) 2 (OH) 8 ·2H 2 O, and Zn 3 (OH) 4 (NO 3 ) 2 into ZnO nanoparticles were investigated at supercritical conditions by combination of Taguchi experiment design method, analysis of variance (ANOVA), and compl…
We demonstrate that longitudinal plasmons in doped monolayer graphene can mediate highly efficient long-range energy transfer between nearby fluorophores, e.g., semiconductor quantum dots. We derive a simple analytical expression for the energy transfer efficiency that incorporates all the essential processes involved…
We investigate the kinetics of block copolymer/nanoparticle composite alignment in an electric field using in situ transmission small-angle X-ray scattering. As a model system, we employ a lamellae forming polystyrene- block -poly(2-vinyl pyridine) block copolymer with different contents of gold nanoparticles in thick…
The coordination environments of Se atoms in binary Ge(x)Se(100-x) glasses with 5 ≤ x ≤ 30 are investigated using a novel, two-dimensional (77)Se nuclear magnetic resonance (NMR) spectroscopic technique. The high-resolution isotropic (77)Se NMR spectra allow for the identification of up to four distinct Se sites in th…
The electronic structure and band dispersion of graphene on SiO${}_{2}$ have been studied by x-ray-absorption spectroscopy (XAS), x-ray-emission spectroscopy (XES), and resonant inelastic x-ray scattering (RIXS). Using first-principles calculations, it is found that the core-hole effect is dramatic in XAS while it has…
A set of π-conjugated oligomer dimers templated in molecular scaffolds is presented as a model system for studying the interactions between chromophores in conjugated polymers (CPs). Single-molecule spectroscopy was used to reveal energy transfer dynamics between two oligomers in either a parallel or oblique-angle geo…
A multifunctional porous Si biosensor that can both monitor the enzymatic activity of minute samples and allow subsequent retrieval of the entrapped proteolytic products for mass spectrometry analysis is described. The biosensor is constructed by DNA-directed/reversible immobilization of enzymes onto a Fabry-Pérot thi…
An atmospheric pressure helium and oxygen plasma has been used for the surface preparation of 410 stainless steel and carbon-fiber epoxy laminates prior to bonding to themselves or to each other. Lap shear results for stainless steel coupons and carbon-fiber epoxy laminates demonstrated an 80% and a 150% increase in b…
The theory describing energy losses of charged non-relativistic projectiles crossing a planar interface is derived on the basis of the Maxwell equations, outlining the physical assumptions of the model in great detail. The employed approach is very general in that various common models for surface excitations (such as…
Ab initio computations are performed to investigate properties of bulk material and epitaxial films made of EuTiO3 (ETO). A whole family of nanoscale twinned phases, that present complex oxygen octahedra tilting (OOT) and unusual antiferroelectricity, is found to be degenerate in energy with simpler phases (all posses…
Using an ab initio atomistic thermodynamics framework, we identify the stable surface structures during the early stages of Cu(100) oxidation at finite temperature and pressure conditions. We predict the clean surface, the 0.25 monolayer oxygen-covered surface, and the missing-row reconstruction as thermodynamically s…
Jute, the pride of Bangladesh, has gained interest in the composite field due to its superior specific properties compared to artificial manmade fibers like glass, kevlar, etc. In this study, jute composites made with the vacuum assisted resin infiltration (VARI) techniques were investigated. Jute fiber preform stacki…
The amyloid is a natural self-assembled peptide material comparable in specific stiffness to spider silk and steel. Throughout the literature there are many studies of the nanometer-sized amyloid fibril; however, peptide mixtures are capable of self-assembling beyond the nanometer scale into micrometer-sized fibers. H…
Weak localization in graphene is studied as a function of carrier density in the range from $1\ifmmode\times\else\texttimes\fi{}{10}^{11}$ cm${}^{\ensuremath{-}2}$ to $1.43\ifmmode\times\else\texttimes\fi{}{10}^{13}$ cm${}^{\ensuremath{-}2}$ using devices produced by epitaxial growth onto SiC and CVD growth on thin me…