Materials Literature
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Abstract Small‐angle X‐ray scattering (SAXS) studies of electrically conductive blends based on polyaniline–dodecylbenzenesulfonic acid (PANI–DBSA)/styrene–butadiene–styrene (SBS) triblock copolymer were performed to investigate the influence of the blend preparation procedure on the nanoscopic structure of the blends…
We demonstrate light-induced formation of semiconductor quantum dots in TOPAS® polymer matrix with very high control of their size and their spatial localization. Irradiation with UV laser pulses of polymer films embedding Cd thiolate precursors results in the formation of cadmium sulfide nanocrystals well confined in…
Ultrathin TaSiC amorphous films prepared by magnetron cosputtering using TaSi2 and C targets on Si(100), in a sandwiched scheme Si(100)∕TaSiC(5nm)∕Cu, were evaluated for barrier performance in copper metallization. Optimizing carbon content maximizes thermal stability of the films as depicted by sheet-resistance, x-ra…
In this paper, we demonstrate reversible resistance switching in a capacitorlike cell using a Ge–Sb–Te film that does not rely on amorphous-crystalline phase change. The polarity of the applied electric field switches the cell resistance between lower- and higher-resistance states, as was observed in current-voltage c…
A very efficient energy transfer from Ce3+ to Er3+ in yttrium aluminum garnet (YAG) matrix is observed. The transfer gives about 1000 times enhancement to the Er3+ 1540nm emission. This is due to efficient absorption by the allowed 4f-5d transition of Ce3+ ions then transfer to Er3+ ions via a matched energy level F9∕…
A physically based one-dimensional shape memory alloy (SMA) model is implemented into the finite element software ABAQUS via a user interface. Linearization of the SMA constitutive law together with complete transformation kinetics is performed and tabulated for implementation. Robust rules for transformation zones of…
Facile synthetic routes have been developed that provide access to cationic and anionic water-soluble polyferrocenylsilane (PFS) polyelectrolytes with controlled molecular weight and narrow polydispersity. Living photolytic ring-opening polymerization of amino-functionalized [1]ferrocenophane (fc) monomers [fcSiMe{C[t…
A one-dimensional coupled thermomechanical model is presented for shape memory alloys (SMAs) under non quasi-static loading by defining a Helmholtz free-energy function consisting of strain energy, thermal energy, and the energy of phase transformation. The first law of thermodynamics is used to address the thermomech…
The stable culture of myogenic cells and their differentiation into myotubes in vitro is often hindered by the mechanical destabilisation of the spontaneously contractile neotissue formed, resulting in the complete loss of differentiating myotubes. Electrospun, parallel aligned nylon 6/6 microfibre arrays were use suc…
A first-principles-based scheme is used to investigate the thickness dependency of domain width of 180° stripe domains in Pb(Zr,Ti)O3 ultrathin films. Our study shows that (1) more metastable states with energy closer to the 180° stripe domain ground state occur in thicker films, (2) the Kittel law is valid for 180° s…
Changes in pressure and magnetic field in the orbital and magnetic ordering temperatures of RVO3 perovskites are reported; they reveal a competition between two magnetic orbitally ordered phases that have opposite preferences for the e-orbital component in the localized {3}T{1g} ground state of the V(3+) ion. This com…
Triple junctions constitute a significant volume fraction of bulk nanocrystalline metals, in which disclinations are typical junction defects. In this study, a disclinated tricrystalline nickel nanowire with three [001] tilt grain boundaries intersecting at 120\ifmmode^\circ\else\textdegree\fi{} angles is simulated at…
Nanofibres, core–shell nanofibres, as well as hollow nanofibres and nanotubes based on polymers, serve as a platform for a broad range of applications as filters, textiles, in photonics, sensors, catalysis, or in medicine and pharmacy. Such nanoobjects become available by techniques such as the well-known electrospinn…
This letter presents direct electron diffraction evidence that structurally frustrated one-dimensional polar nanoregions arising from anticorrelated displacements of Ti and nearest neighboring O ions are responsible for the relaxation behavior observed in doped BaTiO3 relaxor ferroelectrics, rather than chemical short…
A macroscopic block (∼9mm3) of aligned carbon nanotubes (CNTs) was grown by chemical vapor deposition and its simultaneous electrical conductivity and compressive strain responses were measured parallel and perpendicular to the CNT alignment. The block exhibits elastic moduli of 0.9 and 1.6MPa for compressive strain o…
Magnetoelectric (ME) coupling characteristics of LuFe2O4 were examined by monitoring the electrical voltage induced by an oscillating magnetic field under a static bias field (H0). Interestingly, the room-temperature dynamic ME output exhibited a constant plateau behavior up to a certain static-field strength but show…
Off-resonance imaging (ORI) techniques are being increasingly used to image iron oxide imaging agents such as monocrystalline iron oxide nanoparticles (MION). However, the diagnostic accuracy, linearity, and field dependence of ORI have not been fully characterized. In this study, the sensitivity, specificity, and lin…
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Abstract A modular synthesis for chiral and non‐symmetrical salalen ligands (i.e., mono‐reduced salens), carrying an imine and an amine functionality has been developed. The ligands can be assembled in situ by Schiff base formation of an N ‐(2‐hydroxybenzyl)diamine with a salicylic aldehyde, thus allowing rapid and ea…
The plasmonic interaction and optical properties of a metallic nanoshell near a metallic film are investigated theoretically and experimentally. The plasmon hybridization method is extended to include the screening effects mediated by dielectric backgrounds and a realistic description of the dielectric properties of t…