Materials Literature
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In this paper, the development of a multiscale model of collagen fibril is described using a hierarchical approach by combining molecular dynamics simulations and FEM. Steered molecular dynamics was used to investigate the mechanical response of collagen under various conditions that mimic the organization of collagen…
The Rare-Earth sesquioxides (RE 2 O 3 ) exhibit interesting physical and chemical properties. Some of these oxides have tremendous technological applications. At ambient conditions, the RE 2 O 3 systems exist in three polymorphic forms, namely: hexagonal A- type, monoclinic B- type, and cubic C- type. The structural s…
A single gold nano-cylinder presenting multipolar plasmon resonances to enhance two-photon fluorescence is investigated employing three dimensional finite-difference time-domain method. Cylinders of large dimension usually display dipolar and quadrupolar plasmonic resonances. We demonstrate that the dipolar resonance…
We investigate a technique for microparticle aggregation via optical fiber-excited localized surface plasmon resonance of gold nanorods, which were deposited on the designated surface of a tapered optical fiber (TOF). Through the enhanced photothermal effect, a microbubble forms on the TOF at an input optical power of…
A fast and accurate extended Jones matrix method for characterizing the transmitted field of polarization gratings at oblique incidence is reported. The far field diffraction properties of the mth order of the grating are determined by vectorial Fourier coefficients of the transmitted field. With this method, polar pl…
Flexible and transparent polymer complexes prepared by blending chitosan (CS) with about 1 M of oligo-mercaptopropilsiloxane were functionalized by incorporating silver or gold nanoparticles in a concentration range of 0.01 to 0.06 M. The heterosupramolecular polymeric materials obtained were characterized by chemical…
Surface acoustic wave (SAW) devices have been used extensively for a variety of applications such as telecommunications, electronic devices, and sensors. The emerging need for high-bit data processing at gigahertz frequencies and the requirement of high-sensitivity sensors demand the development of high-efficiency SAW…
Abstract Using femtosecond transient absorption spectroscopy, we investigated hot carrier distributions in semiconductor cadmium selenide quantum dots. The relaxation processes represent the behavior of an ensemble of QDs. This concept is applied for analysis with the Fermi‐Dirac distribution and relaxation processes…
In this study, we examine eight ABC heterotrimers whose self-assembly is directed through electrostatic interactions. Oppositely charged pairs of amino acids, with varying side chain length, were assessed for their ability to stabilize a triple helix. Aspartate-lysine was found to result in the most thermally stable h…
This paper reports a new type of energy cell based on micromachined carbon nanotube film (CNF)-lead zirconate titanate cantilevers that is fabricated on silicon substrates. Measurements found that this type of micro-energy cell generates both AC voltages due to the self-reciprocation of the microcantilevers and DC vol…
Abstract Flame‐retardant hyperbranched pentaerythritol (FR‐HPER) was prepared by condensation polymerization between pentaerythritol (PER), the monomer, and phosphate acid we prepared. It was then characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance, thermogravimetric analysis, and matr…
Abstract In situ neutron‐diffraction experiments at the spallation neutron source, simultaneously illuminating the diffraction of the matrix and the strengthening nano precipitates, allow the determination of their plastic deformation. An irreversible neutron‐diffraction‐profile evolution of the nano precipitates is o…
Recent experiments have revealed diverse and sometimes conflicting deformation behaviors of vertically aligned carbon nanotube arrays under compression, but a thorough understanding of this phenomenon is still elusive. Here, we employ a mesoscale bead-spring model to demonstrate that the seemingly complex deformation…
Using first-principles, density functional theory based calculations, we explore the microscopic origin of the switching from antiferromagnetic to ferromagnetic behavior, in replacing Sr by Ca in Sr${}_{2}$CrSbO${}_{6}$ double perovskite. Our study reveals that the difference in the strength of covalency between Sr an…
A methodology for improving antistatic property of polyetherimide (PEI) composite using polyaniline (PANI) grafted multi‐walled carbon nanotubes (MWNTs) as conductive medium was proposed. First, the MWNTs grafted with PANI (PANI‐g‐MWNTs) were prepared by in‐situ polymerization in an emulsion system. Subsequently, PANI…
Mesoporous hypercrosslinked styrene and maleic anhydride microspheres were prepared by suspension polymerization using a free radical initiator. Degree of crosslinking was increased by increasing the divinylbenzene content. Scanning electron micrographs revealed the introduction of definite compactness in the microsph…
Four novel types of laterally di-fluoro substituted 4-(2′-(or 3′-) fluoro phenylazo)-2- (or 3-) fluoro phenyl-4″-alkoxybenzoates were prepared and investigated for their mesophase behavior. In order to deduce the most probable conformation for each of the positional isomers investigated, the dipole moments for each of…
Minimum electrospinning voltage (MEV), in a needle–ground plate configuration, is defined as the needle voltage at which the maximum conversion of the polymer dope into nanofibers is achieved in electrospinning. MEV is unique for a set of electrospinning parameters for a given polymer dope and the square of the MEV is…
Synthetic diamond/AlN composite materials have been fabricated by a combination of microwave plasma-assisted chemical vapor deposition and molecular beam epitaxy. These wide band gap semiconductor heterojunctions show promises for many applications, including thermal management, deep ultraviolet light emitting devices…
Using a synthetic method, the solubility data of pyridazin-3-amine were obtained in methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-propanone, ethyl acetate, and aniline at temperatures ranging from (288.05 to 333.35) K at atmospheric pressure. The fusion enthalpy and melting point were measured by differentia…