Materials Literature
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Super carbon nanotubes (STs) are a kind of hierarchical structure built by carbon nanotubes (called CNT arm tubes). Due to their complicated structure, the mechanical properties of STs are difficult to predict. In this work, an invariability phenomenon is uncovered in the mechanical properties of STs: both the in-plan…
Transparent Yb3+-Er3+-Tm3+ co-doped nano-glass-ceramics have been prepared, 32(SiO2) 9(AlO1.5) 31.5(CdF2) 18.5(PbF2) 5.5(ZnF2): 3.5(Yb-Er-TmF3) mol%, where the co-dopants partition mostly to the fluoride PbF2-based nano-crystals. A comparative study of the up-conversion luminescence in nano-glass-ceramics and its prec…
Ruddlesden–Popper homologous series of Sr n +1 Ti n O 3 n +1 (2≤ n ≤5) compounds were synthesized with accumulating SrO monolayers and n unit cells of SrTiO 3 layers alternately in a pulsed-laser deposition. The successive deposition of these layers at a constant growth temperature ( T g ) of 780 °C resulted in a soli…
Silica nanowires (SiO 2 −NWs) were successfully synthesized on a large scale by direct thermal evaporation of ZnS powder on silicon wafer at 1350 °C. The special geometric morphology induced a high surface roughness (root-mean-square) of several hundreds of nanometers. After functionalization with perfluoroalkysilane…
In this article, the organically modified clay (organoclay) was prepared by treating Na-montmorillonite with alkylammonium ions through a solid state method. Polypropylene (PP)/organoclay nanocomposites were prepared by melt intercalation. X-Ray Diffraction (XRD) and Transmission Election Microscopy (TEM) indicated th…
Abstract We propose to assemble negative index materials (NIMs) from dielectric nanotubes with inner and outer surfaces covered by thin metallic films. The focusing properties of flat and concave lenses assembled from metallized titania nanotubes are compared with those of lenses made from nanorods with the refractive…
Jute fiber (hessian cloth) reinforced polypropylene (PP) composites were prepared by compression molding. The composite fabrication temperature, pressure and time were 190°C, 4 tons and 5 min, respectively. The jute content, in the composites was studied over mechanical properties and it was observed that the highest…
The switching of a molecular length of azobenzene between its trans and cis forms by photoirradiation originates various photoresponsive systems in the molecular level and/or nanolevel. Recently, we and another group separately reported that some azobenzene-modified mesoporous silicas remarkably promote the release of…
Received 14 July 2008DOI:https://doi.org/10.1103/PhysRevLett.101.039903©2008 American Physical Society
Encapsulated nanoparticles were produced by the pulsed laser ablation of MoS 2 −Te composite targets in a high vacuum chamber. Transmission electron microscope and X-ray energy dispersive spectrometer measurements showed that core-like Mo-rich nanoparticles were encapsulated with shell-like Te-rich materials. Layer st…
The complex mechanical modulus of polymer and polymer based composite materials showed a frequency-dependent behaviour during glass transition relaxation, which was historically modelled by the Arrhenius equation. However, this might not be true in a broad frequency domain based on the experience from the frequency de…
The elastic coupling between a polymer network and liquid crystal has been studied in both the SmA * and SmC * phases of a polymer stabilized ferroelectric liquid crystal polymerized in the SmA * phase. Experimental electric field dependent tilt angle and polarization data are analysed through the SmA * to SmC * trans…
An off-gas treatment system is being developed for the collection of volatile fission products during a head-end processing step. The head-end processing step employs high temperatures to oxidize UO2 to U3O8 resulting in the separation of fuel from cladding and the removal of volatile fission products. Three volatile…
Magnetostriction behaviour and magnetostriction hysteresis of the single crystal alloy Tb 0.29 Dy 0.48 Ho 0.23 Fe 2 are investigated experimentally and theoretically. The oriented ⟨1 1 0⟩ single crystals of the magnetostrictive alloy Tb 0.29 Dy 0.48 Ho 0.23 Fe 2 are successfully prepared by the optical floating zone m…
Abstract It is necessary to develop new power generation systems using the unused low‐temperature thermal energy around 100 °C from the viewpoint of global warming prevention. Even if a shape memory alloy is bent at normal temperature, when it is warmed, it has the character that it returns to the original straight fo…
Advantages of the analysis of the topology of the electron localization function (ELF) in the characterization of the chemical bonding in solids are illustrated in the study of the zinc blende --> rock salt transformation in BeO. The 4-fold to 6-fold coordination change is described as a two-step process: first, a cat…
Abstract Low density polyethylene (LDPE) was prepared into micro‐ or submicro‐spheres or nanofibers via melt blending or extrusion of cellulose acetate butyrate (CAB)/LDPE immiscible blends and subsequent removal of the CAB matrix. The sizes of the PE spheres or fibers can be successfully controlled by varying the com…
Kinetics of the porphyrin aggregation leading to a chiral memory system shows a remarkable "catalytic" effect of the noncovalent templates explaining their self-replication ability.
Multilayered polyelectrolyte functionalized gold nanorods (GNRs) are reported for the conjugation of and sensitive detection of bio-molecules. Multilayered polyelectrolyte functionalized GNRs can significantly improve the biocompatibility of cetyltrimethylammonium bromide (CTAB) coated GNRs in a bio-environment and ca…
The influences of the stereochemical structure, the molecular weight, and the number of molecular branches for poly(lactide) (PLA) on enzymatic hydrolysis rates of PLA monolayers were studied by atomic force microscopy (AFM) and the Langmuir-Blodgett (LB) technique. Monolayers of six kinds of PLA with different molecu…