Advanced Materials Research Vol. 893

Abstract: The paper is concerned on the properties of the new ideal circuit element, a memristor. We proposed memristor with nanothin three layers of Pt/ TiO_2-x/TiO₂/TiO_2+x/Pt sandwiched structure in this paper,based on study of the working principles of HP memristor. As the new TiO_2+x layer and its expansion effect,the switching speed of the new structure memristor mentioned would be faster. The paper gives the test result and mechanism of the new structure memristor, such as characteristic analysis results of Pt nanowire, memristor, repetitiveness and V-I characteristic hysteretic curve of three layers memristor by using semiconductor tester.

Abstract: Single-crystalline Sb₂Se₃ and SbBiSe₃ nanowires (NWs) were synthesized by chemical vapor deposition. The SbBiSe₃ NW photodetectors defined by a photolithography microfabrication approach exhibited an enhanced electrical transport and improved spectra responsivity compared with Sb₂Se₃ NW photodetectors. Moreover, the size of synthesized NWs was tailored to optimize the photoelectric performances. Results indicated that the responsivity increased with the thicker or shorter NWs, which were further revalidated by theoretical calculations.

Abstract: Plasmonic, including of located surface Plasmon resonance (LSPR) and surface plasmon polariton (SPP), is a special kind of electromagnetic mode in nanometer scale. Plasmonic nanostructures can be generated to improving the conversion efficiency of photovoltaic devices. In the paper, the concepts of plasmonic and their influences by different metal nanostructure were introduced. Then the different principles of light utilization of plasmonic nanostructure in thin film photovoltaic cell was analyzed.

Abstract: This paper introduces the innovation of adding inorganic nano additive into the organic anti-rust coating and the development of “organic-inorganic nano-composite coating”, which can be used to realize the effective coverage of reinforcement surface by utilizing “self repair” function and “super extension” behavior of nano materials to remedy the defect for severe corrosion of general organic coating caused by the uneven painting.

Abstract: Nanosized calcium phosphate was prepared by a reverse microemulsion method, with a 20~40 nm diameter, which is pH-responsive, nontoxic and colloidally stable in physiological solution. Polyethylene glycol modified calcium phosphate nanoparticles shifted the zeta potential to a neutral charge, which prolonged the nanoparticle circulation time and increased cellular uptake efficacy to targeted cells. The PEG-functionalized nanoparticles exhibit a great potential for efficaciously delivering hydrophobic anticancer drug, such as paclitaxel, to cells and tumors.

Abstract: Green high performance fiber reinforced cementitious composites (GHPFRCC) is the optimized mix proportion of engineered cementitious composites (ECC) with high volume of fly ash and polyvinyl alcohol (PVA) fiber. To study the compressive performance, the prism stress-strain relationship of GHPFRCC is the focus in this study. There are sixteen groups of GHPFRCC specimens with the size 40mm×40mm×160mm. The compressive stress-strain curves were obtained based on the uniaxial compression tests. Experimental results show that the uniaxial compression stress-strain curve belongs to the skewed unimodal curve. The peak strain can steadily reach more than 0.005, and it has put up a great plastic deformation capacity and post-peak ductility. It has still reserved some residual strength even when the strain is up to a bigger value. The research achievements can promote the application of GHPFRCC in the practical engineering.

Abstract: The powdery nitrile butadiene rubbers (P-NBRs) are employed to improve the comprehensive properties of the bisphenol A dicyanate ester (BADCY). The addition of P-NBRs affecting on the curing kinetics of the composites is analyzed and characterized by gelation test, differential scanning calorimentry (DSC) and Fourier transformed infrared spectroscopy (FTIR). And the contents of P-NBRs affecting on the mechanical and dielectric properties of the P-NBRs/BADCY composites are also investigated. Results show that the addition of P-NBRs has little influence on the cure activation energy. The mechanical properties of the P-NBRs/BADCY composites are optimal with 5 wt% P-NBRs. The dielectric constant values of the P-NBRs/BADCY composites are increased with the increasing addition of P-NBRs.

Abstract: The functionalized silicon carbide (SiC) fillers are employed to fabricate silicon carbide/polyphenylene sulfide (PPS) composites by mechanical ball milling-compression molding method. The thermal conductive coefficient of the SiC/PPS composites with 40 wt% functionalized SiC is 0.934 W/ mK, 4 times higher than that of the original PPS. The mechanical properties of SiC/PPS composites are optimal with 5 wt% addition of SiC. Both the heat resistant and dielectric properties of the SiC/PPS composites are increased with the increasing addition of SiC. For a given SiC loading, the surface functionalization of SiC can improve the thermal conductivities and mechanical properties of the SiC/PPS composites simultaneously.

Abstract: In this study, fundamental research, including material selection and structure design of guide sleeves in 3D weaving composites were investigated by three-point bending test, compression test and SEM observation. The results showed that carbon fiber composite guide sleeves had much higher interface bonding strength than titanium alloy guide sleeves, while worse flexural strength. There were three kind of structure design of the guide sleeves that were groove, rough surface and untreated surface. Compared with the structure of untreated surface, guide sleeves with grooves and with rough surface exhibited higher interface bonding strength, due to increasing the contact area between the guide sleeve and resin. But the guide sleeves with rough surface took the advantages of more simple to preparation and lower cost than those with the grooves. Furthermore the structure of groove could damage the flexural behavior of the guide sleeves.

Abstract: The objective was to gain the fire characteristics of the External Thermal Insulation Composite Systems (ETICS), which is widely used in China. A series of large-scale fire experiments were conducted under ISO 9705 room test on the ETICS with its core of polystyrene (PS) foam and its outer layer of plastering mortar. The various thicknesses (3 mm and 5 mm) of the outer layer were considered. Under the fire source impact and the melting behavior of PS foam, the flame evolution of ETICS could form a flowing fire and cavity fire, which was obviously different from that of thermal insulation panel itself, but similar to the sandwich panels. A detailed analysis was performed to quantify some major parameters, such as the heat release rate (HRR) and temperature distribution. The results indicated that the peak of HRR could be reduced 11.34% and put off 94 seconds by the thicker outer layer (5 mm); similarly the peak of HRR could be reduced 22% and put off 190 seconds by the flame-retardant treated.