Materials Literature
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To understand the effects of atomic oxygen (AO) irradiation on the structural and tribological behaviors of polymer composites, polyimide/Al 2 O 3 composites were irradiated with AO in a ground‐based simulation facility. The structural changes were characterized by X‐ray photoelectron spectroscopy and attenuated total…
Thermal properties of two types of porous silicon are studied using the pulsed-photothermal method (PPT). This method is based on a pulsed-laser source in the nanosecond regime. A 1D analytical model is coupled with the PPT technique in order to determine thermal properties of the studied samples (thermal conductivity…
In order to impart antibacterial properties to microfibrous electrospun materials from styrene/maleic anhydride copolymers, quaternized chitosan derivatives (QCh) containing alkyl substituents of different chain lengths are covalently attached to the mats. A complete inhibition of the growth of bacteria, S. aureus (Gr…
Eu2O3/graphene nanocomposites have been synthesized using graphite oxide and europium nitrate as precursor for graphene and europium oxide, respectively. Graphene coated by nanosized Eu2O3 particles has been confirmed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis. TEM analys…
The photochromic reactivity of terarylenes is integrated with molecular folding that is controlled through a host-guest interaction. A thieno[3,2,b]pyridine unit is introduced into a photochromic terarylene structure as an aryl unit to form a guest-interacting site. Thienopyridine-containing terarylenes showed solvent…
The purpose of this paper is to enhance Raman signals in the evanescent field by using the excitation of long-range surface plasmons (LRSPs). A four-phase Kretschmann LRSP resonance (LRSPR) setup composed of a K9 prism/MgF 2 film/silver film/water configuration was constructed. Incident angle-dependent surface-enhance…
The aim of the work was to clad Ti-Ta-Nb coating on a substrate of pure titanium. Cladding was carried out by non-vacuum electron-beam treatment. As a result a good quality coating thickness of about 2 mm was obtained. Microstructural and microhardness tests were conducted. Dendritic structure and the borders of the f…
The stability and electronic structure of bare [001] nanowires of anatase and rutile have been investigated using ab initio density functional calculations. It was found that symmetry plays an important role in both properties below a critical diameter. Up to 2.1 nm in anatase and 3.7 nm in rutile, those {100}-walled…
Free neutral CO(2) clusters were produced by adiabatic expansion and characterized by carbon 1s (C1s) photoelectron spectroscopy using synchrotron radiation. The shift in C1s ionization energy (IE) between the cluster and the monomer, i.e., ΔIE = IE(cluster) - IE(monomer), was found to vary systematically with the exp…
Ionenmobilitäts-Massenspektrometrie wird als neue Analysetechnik für Polyoxometallate erprobt und zur Unterscheidung photoschaltbarer Isomere von organisch-anorganischen Hybridverbindungen eingesetzt.
The reflection and transmission properties of photosensitized cholesteric liquid crystals (CLCs) are examined. Introduction of mesogenic push-pull azobenzene dyes into blue and green reflective CLCs enables fast (sub-second), photoswitchable optical properties due to the overlap of the trans and cis absorption states.…
Abstract Green composites were produced from various cationically cured natural oil‐based resins and agricultural fibers. The natural oils and agricultural fibers of interest included corn, soybean, fish, and linseed oils and corn stover, wheat straw (WS), and switchgrass fibers. The effects of the types of natural oi…
In a variety of biomedical applications (e.g., tissue engineering, drug delivery, etc.), the role of a bioactive material is to serve as a platform by which one can modulate the cellular response into a desired role. Of the methods by which one may achieve this control (e.g., shape, structure, binding, growth factor r…
A novel organic/inorganic hybrid material comprising carboncoated cobalt nanoparticles and a poly(benzylchloride)styrene shell is the first magnetic support that complies with important requirements for immobilized reagents and scavengers, that is, stability under harsh conditions (e.g., acids), sufficient loading (up…
Electrochemical impedance spectroscopy and XPS studies on AISI 304 stainless steel in naturally aerated 0.5 M H 2 SO 4 solution were carried out at room temperature. The valuable model of the metal/solution interphase was established, and the reliable equivalent electrical circuits in the solution were presented. The…
This letter analyzes the scaling property of nanowire (NW) phase-change memory (PCM) using analytic and numerical methods. The scaling scenarios of the three widely used NW PCM operation schemes (i.e., constant electric field, voltage, and current) are studied and compared. It is shown that if the device size is downs…
Processing the ${\mathrm{SrTiO}}_{3}(001)$ surface results in the self-assembly of reduced titanate nanowires whose widths are approximately 1 nm. We have imaged these nanowires and their defects at elevated temperatures by atomic resolution scanning tunneling microscopy. The nanowire structure is modeled with density…
We have created a randomly distributed nanocone substrate on silicon coated with silver for surface-plasmon-enhanced fluorescence detection and 3D cell imaging. Optical characterization of the nanocone substrate showed it can support several plasmonic modes (in the 300-800 nm wavelength range) that can be coupled to a…
The microstructural and electrochemical properties of La 0.4 Sr 0.6 Ti 0.8 Mn 0.2 O 3±δ (LSTM) fabricated via liquid-phase impregnation have been investigated for solid oxide fuel cell (SOFC) applications. Scanning electron micrography (SEM) showed that LSTM uniformly covers the porous scaffold when heated in an oxidi…
Cell-adhesive peptides derived from extracellular matrix (ECM) proteins are potential candidates for incorporating cell-binding activities into materials for tissue engineering. We have identified a number of cell adhesive peptides from laminins, which are major components of basement membrane ECM. Our goal is the dev…