Materials Literature
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In this work, polypropylene (PP) matrix reinforced with several single-walled carbon nanotubes (SWNTs) concentrations were prepared by a melt-mixing method. The effect of SWNTs on the thermal degradation behavior of polypropylene was studied by thermal gravimetric analysis. The results revealed that adding the SWNTs i…
We report on a method how quality factors of guided-mode resonances in photonic crystal slabs (PCSs) can be determined in the reciprocal space. Transmission measurements through PCSs are performed using crossed polarization filters before and after the PCS. Consequently the unwanted illumination source is suppressed a…
It has been argued that the experimentally observed limitation of heat transport through boron nitride nanotubes is due to intershell scattering rather than to inefficient heat transfer to inner shells. Using an atomistic Green's function calculation, we present evidence that on the contrary, intershell or any other t…
Abstract BACKGROUND: Poly( para ‐dioxanone) (PPDO) is a biodegradable polyester with excellent biodegradability, bioabsorbability, biocompatibility and mechanical flexibility. However, its high cost and relatively fast degradation rate have hindered the development of commercial applications. Blending with other polym…
We investigated the molecular orientation of organized molecular films with regard to solid-state structures for newly synthesized comb copolymers with 2-vinyl-4,6-diamino-1,3,5-triazine (VDAT) by surface pressure-area (pi-A) isotherms, in-plane and out-of-plane X-ray diffraction (XRD), atomic force microscopy (AFM),…
Polymers, such as poly(methyl methacrylate) (PMMA), are important structural materials for microsystems because of their excellent mechanical properties; however, they suffer from severe problems of adhesion, friction, and wear [B. Bhushan, J. N. Israelachvili, and U. Landman, Nature (London) 374, 607 (1995)]. We repo…
Film morphology, surface compositions and hydrophobic properties of N-β-aminoethyl-γ-aminopropyl polysiloxane (ASO-1) coated on regenerated cellulose (cel) substrate surface (ASO-1/cel) were investigated and studied by atomic force microscopy, X-ray photoelectron spectroscopy and other techniques. Influenced by the ir…
We report an $^{75}\text{A}\text{s}$ NMR study of ${\text{BaFe}}_{2}{\text{As}}_{2}$ in both single crystals and polycrystal forms. We find that Sn impurities in the single crystal dramatically alter the low energy spin fluctuations and suppress the ordering temperature from 138 to 85 K. In contrast to Sn-free samples…
Abstract BACKGROUND: Crosslinking induced by non‐covalent interactions in rubber materials is currently attracting a great deal of interest because of its perceived reversibility. Some thermoplastic elastomers and ionic elastomers, which are crosslinked by physical entanglements and ionic bonds, respectively, have alr…
This study aimed to establish the effect on comfort of introducing the DOW XLA™ fiber in woven polyester/cotton fabrics used for professional wear end use. The comfort elements analyzed in this study were thermal and moisture sensations, tactile sensations, and pressure sensations. A fabric elasticized with the elasti…
Time-resolved specular neutron reflectivity measurements are presented and interpreted for electroactive polyvinylferrocene (PVF) films subject to potentiodynamic electrochemical control. New data acquisition methodology allows an effective measurement time scale on the order of seconds, which is an improvement over c…
Observation of abnormal (against the applied electric field) domain switching in Pb(ZrxTi1−x)O3 films by piezoresponse force microscopy is reported. In some grains polarization orients opposite to the external field in the presence of the applied field, while the rest of the film volume switches in a normal way. This…
Abstract B‐staged epoxy/single‐walled carbon nanotube (SWCNT) nanocomposite thin films at 50% cure were prepared to improve the conductivity and mechanical performance of laminated composites. The SWCNTs were functionalized by oxidation and subsequent grafting with polyamidoamine generation‐zero dendrimers. The epoxy…
Thermal-induced gelation of polyacrylonitrile (PAN)/dimethyl sulfoxide (DMSO) concentrated solution has been rheologically investigated in relation to temperature and aging. Phase behavior of PAN/DMSO solution was studied through examining the intrinsic viscosities [eta]. The gelation temperature T(g), gel time t(g),…
The behavior of mixed-ligand-coated gold nanoparticles at a liquid-liquid interface during compression has been investigated. The system was characterized by measuring pressure-area isotherms and by simultaneously performing in situ X-ray studies. Additionally, Monte Carlo (MC) simulations were carried out in order to…
We report a protocol for investigating the effect of the ligand shell in the growth process of aqueous CdTe nanocrystals (NCs) from the viewpoint of both experiment and theoretical calculation. Experimentally we develop a new method of sodium-citrate-assisted preparation of aqueous CdTe NCs, which breaks through the r…
Organic field effect transistors based on poly(3-hexylthiophene) and CuII tetraphenylporphyrin composite were investigated as sensors for detection of vapors of nitrobased explosive compounds, viz., 1,3,5-trinitro-1,3,5-triazacyclohexane (RDX), 2,4,6-trinitrotoluene (TNT), and dinitrobenzene, which are also strong oxi…
The structure of ZnO nanorods coated with fluorescent polymer poly(phenylene ethynylene) (PPE) have been fabricated for 2,4,6-trinitrotoluene (TNT) detection. In this structure, hydrothermally synthesized crystalline ZnO nanorod arrays were used as waveguides and supporting materials for the TNT sensitive polymer, PPE…
We reported that work softening takes place during room-temperature rolling of nanocrystalline Ni at an equivalent strain of around 0.30. The work softening corresponds to a strain-induced phase transformation from a face-centered cubic (fcc) to a body-centered cubic (bcc) lattice. The hardness decreases with increasi…
Abstract Two series of flexible polyurethane foams were fabricated by substituting conventional petroleum‐based polyols with increasing amounts of soy‐based polyols (SBP) having different hydroxyl numbers. The mechanical properties of the foams were characterized by stress–strain analysis in the compression mode and D…