Materials Literature
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ABSTRACT Nanocomposite low-density polyethylene (LDPE) films containing Ag and ZnO nanoparticles were prepared by melt mixing process through the twin-screw extruder. Packages prepared from nanocomposite films were then filled with fresh orange juice, pasteurized (at 55 and 65C for 16 s) and then stored at 4C. Microbi…
Water confined in narrow nanopores that prevent ice crystallization is usually studied as a means to understand the anomalous behavior of bulk liquid water. Nevertheless, there is no agreement on the similarity of the thermodynamics of bulk and nanoconfined liquid water. In this work, we use molecular dynamics simulat…
Polyetheylene glycol (PEG) brushes, for instance, physically tethered to a surface via the adsorbing portion of a PEG-containing copolymer, are a popular protein-resistant surface treatment. Though physisorbed brushes might be displaced by competing species, they continue to dominate diagnostic chips and other applica…
In the present work, the sinterability and formation of nanosized yttrium iron garnet (Y3Fe5O12), yttrium perovskite ferrite (YFeO3), cobalt, nickel and zinc iron spinel (CoFe2O4, NiFe2O4 and ZnFe2O4, respectively) powders by an aqueous sol-gel processes are investigated. The metal ions, generated by dissolving starti…
We present the synthesis, crystal structures, and physical properties of Tl 2 Hg 3 Q 4 (Q = S, Se, and Te). The incongruently melting Tl 2 Hg 3 Q 4 crystals were grown in a Tl x Q flux. These compounds are isostructural and crystallize in a monoclinic cell with a layered structure, adopting the space group C 2/ c with…
Quantum dot (QD) blinking is characterized by switching between an "on" state and an "off" state, and a power-law distribution of on and off times with exponents from 1.0 to 2.0. The origin of blinking behavior in QDs, however, has remained a mystery. Here we describe an energy-band model for QDs that captures the ful…
Abstract Warm mix asphalt (WMA) is a fairly recent technology developed primarily to address issues such as high vapor emissions and high energy costs associated with the traditional hot mix asphalt (HMA) paving. Although the WMA is becoming a popular paving technology through field and laboratory evaluations, many re…
A numerical model to estimate critical times required for nanovoid nucleation in high-purity aluminum single crystals subjected to shock loading is presented. We regard a nanovoid to be nucleated when it attains a size sufficient for subsequent growth by dislocation-mediated plasticity. Nucleation is assumed to procee…
Regular pentagonal adhesive tiles were obtained by designing a cyclic fluoropentamer with an internal CF⋅⋅⋅HN H-bonded network and “sticky” edges that can glue the molecules together through intermolecular CArH⋅⋅⋅OC H bonds. In the crystal they form the mathematically predicted densest all-pentagon 2D lattice with a…
Single-walled carbon nanotubes (SWNTs) sorted by electronic type are employed as organic photovoltaic device anodes. Metal-enriched SWNT films yield device efficiencies that are fifty times greater than their semiconducting counterparts. Through sheet resistance, UV-vis-NIR optical absorbance, and X-ray photoelectron…
Starting from the many-particle Smoluchowski equation, we derive a dynamical density functional theory for Brownian particles with an arbitrary shape. Both passive and active (self-propelled) particles are considered. The resulting theory constitutes a microscopic framework to explore the collective dynamical behavior…
( K,Na ) NbO 3 ( KNN ) lead‐free ceramics were fabricated using conventional solid‐state reaction method. The domain configurations were studied with transmission electron microscopy and found to be closely related to the sintering temperature and cooling rate. High density ceramics with uniform compositions were obta…
Abstract This review firstly summarizes our recent work on the preparation and photophysical properties of cationic or neutral lanthanide(III) monoporphyrinate complexes, as well as some bridging dinuclear complexes, in which the porphyrinate anion can sensitize the NIR emission of NdIII, YbIII and ErIII ions by servi…
The aims of this research were to study the production processes and properties of thermal insulation produced from pineapple leaves using natural rubber latex as a binder. Thermal insulation boards were made by spraying the pretreated natural rubber latex onto pineapple fiber to form a squared thermal insulation with…
The piezoelectric coefficient of high temperature piezoelectric ceramics, denoted as Bi(Me)O 3 ‐ PbTiO 3 , ( Me = Fe , Sc , ( Mg 1/2 Ti 1/2 )) was investigated as a function of temperature by using a custom‐designed test frame. Utilizing laser vibrometry, it was possible to assess the piezoelectric coefficient in situ…
The crystallization of isotactic polypropylene (iPP) under the coexistence of shear flow and carbon nanotubes (CNTs) was investigated by means of in situ synchrotron X-ray scattering techniques, i.e. wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS). Compared to sheared pure iPP, the combined…
The topology and geometry of closed defect loops is studied in chiral nematic colloids with variable chirality. The colloidal particles with perpendicular surface anchoring of liquid crystalline molecules are inserted in a twisted nematic cell with the thickness that is only slightly larger than the diameter of the co…
The realization of the full potential for polymeric nanocomposites to manifest their entitled property improvements relies, for some properties, on the ability to achieve maximum particle–matrix interfacial area. Well-dispersed nanocomposites incorporating colloidal silica as the filler can be realized in both polysty…
This letter reports the impact of surface morphology on the carrier transport and radio-frequency performance of graphene FETs formed on epitaxial graphene synthesized on SiC substrates. Such graphene exhibits long terrace structures with widths between 3-5 μm and steps of 10 ± 2 nm in height. While a carrier mobility…
We investigate the local structure of ferromagnetic Zn(1-x)Co(x)O epilayers by coupling polarization-dependent x-ray absorption spectroscopy and ab initio calculations of selected defect structures. We give clear evidence of the presence of oxygen vacancies, located close to the Co atoms in a specific complex configur…