Materials Literature
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Inelastic neutron scattering is used to probe the collective spin excitations of the near optimally doped superconductor $\text{Ba}{({\text{Fe}}_{1\ensuremath{-}x}{\text{Co}}_{x})}_{2}{\text{As}}_{2}$ $(x=0.065)$. Previous measurements on the antiferromagnetically ordered parents of this material show a strongly aniso…
In this paper, different modeling approaches representing the behavior of supercapacitors are presented. A hybrid modeling approach is developed to improve the characterization of classical supercapacitor models proposed in the literature. This approach uses various representations (frequency and temporal results) of…
Photovoltaic devices based on single-walled carbon nanotubes (SWNTs) and n-silicon heterojunctions have been fabricated by a spray deposition process. We provide direct evidence that nanotubes serve as an active photosensing material involved directly in the photon absorption process as well as contributing to charge…
Abstract Monodispersed, readily‐grafted, and biocompatible surface‐enhanced Raman spectroscopic (SERS) tagging materials are developed; they are composed of bimetallic Au@Ag nanoparticles (NPs) for optical enhancement, a reporter molecule for spectroscopic signature, and a carbon shell for protection and bioconjugatio…
Efficient carrier multiplication in InP nanoparticles is reported; ultrafast transient absorption measurements at the band edge were used to determine the number of excitons per photoexcited nanoparticle for a range of both excitation fluences and photon energies. At photon energies greater than $2.1\ifmmode\pm\else\t…
Interface bond structure, in addition to the well-known size and shape quantum confinement effects, is another factor that affects the properties of nanomaterials that is less known and studied. Inspired by the thiol-bridging "staple" motif (RS-Au-SR, Jadzinsky; et al. Science 2007, 318, 430.) discovered from monothio…
The tensile behavior of CVI SiC/SiC composites with Hi‐Nicalon type‐S (Hi‐NicalonS) or Tyranno‐SA3 (SA3) fibers was investigated using minicomposite test specimens. Minicomposites contain a single tow. The mechanical behavior was correlated with microstructural features including tow failure strength and interface cha…
Interest in the development of new sources of transplantable materials for the treatment of injury or disease has led to the convergence of tissue engineering with stem cell technology. Bone and joint disorders are expected to benefit from this new technology because of the low self-regenerating capacity of bone matri…
We prove that the stress tensor, tau(ab), of a molecular system with arbitrary, short-range interactions can be point-wisely expressed as the functional derivative of the partition function with respect to the local deformation tensor. In this approach, the set of components of tau(ab) has a simple interpretation as t…
A versatile approach for the preparation of micrometer-sized, monodisperse, "mushroom-like" Janus polymer particles in aqueous dispersed systems is proposed. The synthetic methodology of the Janus particles consists of the following two steps. The first step is the preparation of spherical poly(methyl methacrylate) (P…
We study the neutron-scattering spectrum in iron pnictides based on the random-phase approximation in the five-orbital model for fully gapped $s$-wave states with sign reversal $({s}_{\ifmmode\pm\else\textpm\fi{}})$ and without sign reversal $({s}_{++})$. In the ${s}_{++}$-wave state, we find that a prominent hump str…
We report DC driven full color inkjet printed quantum-dots light-emitting devices. The inkjet was used to print monochromatic red, green, and blue, as well as integrate red-green-blue light-emitting quantum dots unto a substrate having QVGA display. The performance of the inkjet printed monochrome devices was on the s…
We investigate the binding surface along the Bain path and phonon dispersion relations for the cubic phase of the ferromagnetic binary alloys ${\text{Fe}}_{3}X(X=\text{Ni},\text{Pd},\text{Pt})$ for $\text{L}{1}_{2}$ and $\text{D}{0}_{22}$ ordered phases from first principles by means of density functional theory. The…
Graphene has shown impressive properties for nanoelectronics applications, including a high mobility and a widthdependent bandgap. Use of graphene in nanoelectronics would most likely be in the form of graphene nanoribbons (GNRs) where the ribbon width is expected to be less than 20 nm. Many theoretical projections ha…
The multicomponent system of [Fe(dpp)(2)][Ni(mnt)(2)](2).MeNO(2) (1; dpp = 2,6-bis(pyrazol-1-yl)pyridine and mnt = maleonitriledithiolate) was prepared by the reaction of [Fe(dpp)(2)](BF(4))(2) with (Bu(4)N)[Ni(mnt)(2)] in MeNO(2). Variable-temperature X-ray structural analyses, magnetic susceptibility, and heat capac…
We present in this review a joint experimental and theoretical overview of the synthesis techniques and properties of boron-nitride (BN) and boron-carbonitride (BCN) nanotubes. While their tubular structure is similar to that of their carbon analogues, we show that their electronic properties are significantly differe…
The charge carrier mobility is a key parameter for the organic bulk heterojunction solar cell efficiency. It was recently shown that the interplay charge carrier transport and recombination, both depending on electron and hole mobilities, leads to a point of maximum power conversion efficiency at a finite mobility. Ch…
We overview the basic concepts, models, and methods related to the multi-field continuum theory of solids with complex structures. The multi-field theory is formulated for structural solids by introducing a macrocell consisting of several primitive cells and, accordingly, by increasing the number of vector fields desc…
We compute the orbital magnetization in real materials by evaluating a recently discovered formula for periodic systems, within density functional theory. We obtain improved values of the orbital magnetization in the ferromagnetic metals Fe, Co, and Ni, by taking into account the contribution of the interstitial regio…
In this study a new numerical approach of the fluid dynamic, the lattice Boltzmann method (LBM), is used to solved the stream in a atmospheric Argon-nitrogen plasma jet. The axial symmetry and the variation of density, viscosity and conductivity with the temperature are taken into account. The reliability of the resul…