Materials Literature
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We report the fabrication and properties of a polymeric memristor, i.e. an electronic element with memory of its previous history. We show how this element can be viewed as a functional analog of a synaptic junction and how it can be used as a critical node in adaptive networks capable of bioinspired intelligent signa…
Since the pioneering work of S.Y. Chou et al.[1] Nano Imprint Lithography (NIL) has emerged as a promising technique for surface patterning, opening for numerous applications ranging from nanophotonics[2] to microfluidics[3]. NIL basically consists in the stamping of deformable surfaces or films. Preferred materials a…
The segmental and local chain dynamics as well as the transport of Na + and Li + cations in a series of model poly(ethylene oxide)-based polyurethane ionomers is investigated using dielectric relaxation spectroscopy. A physical model of electrode polarization is employed to separately determine mobile ion concentratio…
Horizontally aligned single-walled carbon nanotubes (SWNTs) are highly desired for SWNT device applications. A large variety of metals including Fe, Co, Ni, Cu, Pt, Pd, Mn, Mo, Cr, Sn, Au, Mg, and Al successfully catalyzed the growth of such tubes on stable temperature (ST)-cut quartz by lattice guidance. In addition,…
We study the effects of site dilution disorder on the electronic properties in graphene multilayers, in particular the bilayer and the infinite stack. The simplicity of the model allows for an easy implementation of the coherent-potential approximation and some analytical results. Within the model we compute the self-…
Dissolved organic matter (DOM) has been reported to stabilize carbon nanotube (CNT) suspensions, which increases concern over the subsequent transport and behavior of CNTs. However, it is unknown exactly which compounds or functional groups cause the stabilization of CNTs in natural environments. Naturally occurring t…
A first-principles investigation of the electronic properties of boron nitride nanoribbons (BNNRs) having either armchair or zigzag shaped edges passivated by hydrogen with widths up to 10 nm is presented. Band gaps of armchair BNNRs exhibit family dependent oscillations as the width increases and, for ribbons wider t…
Motivated by recent neutron scattering experiments, we study the ordering of spins in the iron-based superconductors $\mathrm{LaFeAs}({\mathrm{O}}_{1\ensuremath{-}x}{\mathrm{F}}_{x})$, assuming them in proximity to a Mott insulator in the phase diagram. The ground state of the parent system with $x=0$ is a spin-densit…
The properties of suspended graphene are currently attracting enormous interest, but the small size of available samples and the difficulties in making them severely restrict the number of experimental techniques that can be used to study the optical, mechanical, electronic, thermal, and other characteristics of this…
The Haldane-Anderson model previously used for describing the adsorption on a crystalline substrate is generalized to the case of an amorphous substrate. It is demonstrated that the main difference between the occupation numbers of the adatom is observed in the case where the atomic level overlaps with the band gap (f…
By atomic force microscopy, the plastic deformation marks resulting from monotonic and cyclic plastic deformation were analysed to study the plasticity in each phase of Duplex Stainless Steels. In austenite, straight slip bands were observed after monotonic loading. These straight slip bands seem to serve as fatigue e…
Ultrathin chromium oxide layers (nanostructures) were synthesized on the (100) and (110) silicon and gallium arsenide surfaces by molecular layering (atom layer deposition). Technological factors were shown to influence the main rules governing nanolayer formation, nanolayer composition, and some electric nanolayer ch…
Studies on chemical mechanical polishing (CMP) for silicon nitride (Si3N4) balls with CeO2 abrasive carried to investigate the mechanism of chemo-mechanical action between silicon nitride and CeO2. It is found that CeO2 is more effective to obtain smooth Si3N4 balls than other abrasives, and extremely smooth Si3N4 bal…
The diatom Chaetoceros socialis f. radians was found during the study of the phytoplankton of Amursky Bay. This is its first record for the Sea of Japan. A detailed morphological description based on light and electron microscopic observations is presented. The peculiarities of development of C. socialis f. radians in…
The highly oriented graphite film was used for the starting material. The large amount of hexagonal diamond phase was recovered to ambient conditions after high pressure and high temperature treatment.
Abstract The vascular stents are important medical devices introduced into a vessel to protect the lumen from unfriendly stenosis. However, Nitinol stent is easy to fail in practice. The present paper focuses on the influence of defects on its mechanical behavior by finite element analysis. The essential stent cell is…
Resonance modes corresponding to a spin-soliton resonance have been found in the electron spin resonance spectra of [Cr(CN) 6 ][Mn(S)-pnH-(H 2 O)]H 2 O two-dimensional (2D) chiral single crystals and [Mn{(R/S)-pn}] 2 [Mn{(R/S)-pn} 2 (H 2 O)][Cr(CN) 6 ] 2 chiral single crystals with a 3D magnetic order. It is also esta…
Using poly(vinylidene fluoride) (PVDF) carbonization at 750° C in fine-particle silica and its mixtures with graphite, we have prepared carbon-loaded porous composites which offer benzene absorption from 0.90 to 1.52 ml/g, compressive strength of 6 MPa, and Brinell hardness of up to 18 MPa. We observed the formation o…
Abstract The foaming power and foam stability of three commercial alkyl polyglycosides (APG), Glucopon 215, 600 and 650, have been studied using a modified Ross Miles method. The effects of APG concentration (0.1–4.0 g/L) and temperature (30–60°C) on foam level have been analysed, determining the volume of air in the…
Luminescence intensity of heterostructures based on n -ZnO/ p -GaN:(Er + Zn) and n -ZnO/AlGaN:(Er + Zn) is higher by more than an order of magnitude than the corresponding intensity of separate n -ZnO, p -GaN:(Er + Zn), and AlGaN:(Er + Zn) layers. Most likely, this phenomenon is due to the effective tunneling recombin…