Materials Literature
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Some equipments are required for optical limiting against laser pulses. Multi-wall carbon nanotubes (MWNTs) have exhibit perfect optical limiting property. The size-fractionation of MWNTs/polydimethylsiloxane (PDMS) films has been achieved. The Z-scan experiments and transmission measurements with 532 nm wavelength la…
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We have theoretically investigated the impact of atomic disorder on the electronic states in vertically stacked InAs/GaAs quantum dot superlattices by randomly replacing some In atoms with Ga atoms. We find that as long as the number of replaced In atoms is the same, the energy shift is fairly independent of the rough…
The second phase particle in steel can refine crystal grain and improve performance of steel products. In the paper, how Sm2O3 particle affecting on inclusion and crystal grain size of steel product was studied by adding Sm2O3 particle into steel. The result shows the Sm2O3 particle will not agglomerate and the conten…
Abstract In this work, cetyltrimethyl ammonium bromide and methacryloyloxyethyhrimethyl ammonium chloride were used to prepare organophilic montmorillonite (O‐MMT). Then, polypropylene (PP)–clay nanocomposites were prepared by the in situ grafting polymerization of styrene (St)‐containing O‐MMT onto PP with tert‐butyl…
Nanomembranes represent a novel building block for nanosystems, characterized by a thickness below 100 nm and a giant aspect ratios. A typical procedure for nanomembrane fabrication starts from an ultrathin layer deposited on some kind of a sacrificial substrate. The nanomembrane is released by etching away the substr…
The nanosized TiO2was prepared by microemulsion process in the system of cyclohexane/[Span80 combine with Tween40]/water with TiOSO4as raw material. The synthesis process of the powder was investigated by differential thermal analysis (DTA), X-ray diffraction (XRD) and laser particle size analysis (LPSA). The results…
The study was to examine the effect of short-term compression to the mRNA signal level in extra cellular matrix metabolism of goat temporomandibular joint (TMJ) discs using reverse transcription-polymerase chain reaction (RT-PCR) method. According to previous studies on articular chondrocytes, the loading levels were…
Abstract Allograft decellularization based on detergents and/or enzymes to reduce antigenicity has been reported to damage tissue structure. We applied to human aortic valves a non-detergent/non-protease decellularization treatment prior to cryopreservation. To ensure that the method did not negatively impact valve st…
Abstract A major challenge in tissue engineering of heart valves is the in vitro creation of mature tissue structures compliant with the native valve function. Concerning the remodeling capacity of the extracellular matrix (ECM), various cell types have been investigated, including prenatal cells, umbilical cord and v…
This paper improved the previous process and used the exhaust after the reaction to heating the feeding gas, in order to achieve rational use of energy. Used HZSM-5 as carrier of catalysts, the modification of copper-vanadium catalyst Cu3V2O8/ZSM-5 was studied, and the best one was founded. Results showed that CoO-K2S…
Polymer nanocomposite technology has had significant impact on material design. With the environmental advantages of photopolymerization, a research has recently focused on producing nanocomposites utilizing inexpensive clay particles based on in situ photopolymerization. In this research, novel polymerizable organocl…
Over the past two decades, nanotechnology has offered the promise of revolutionary performance improvements over existing armor materials. During that time there was substantial effort and resources put into developing the material technology and supporting theories, with only limited emphasis placed on understanding…
A previously developed simulation technique has been applied to the prediction of the location of tin whiskers, which create reliability problems, generated on electrodeposited tin plating on a copper lead frame. This multi-scale simulation technique uses molecular dynamics simulation and a finite element method (FEM)…
The structural properties of vertically aligned ZnO nanowires (NWs) prepared using hydrothermal synthesis at various temperatures and different precursor concentrations are systematically described. The ZnO NWs were synthesized on ZnO seed layers via an aqueous solution method with zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O) h…
ZnO thin films were deposited on a-, c- and m- plane oriented 4H-SiC substrates by pulsed laser deposition. ZnO nanowires were formed on substrates by tube furnace. Shape and density of the ZnO nanowires were investigated by field emission scanning electron microscope. Average surface roughness and root mean square su…
This paper is the report of research work in which the well known thermoelectric materials (Bi, Pb and Te) are investigated as the thermo generator elements. The pallets Bi2Te3, Pb2Te3and Bi2Pb3are prepared by 15mm solution and then studied for the generation of thermo emf in the normal mode in the temperature range o…
A novel approach will be discussed to design and fabricate sensors for a wide variety of wavelengths by selecting appropriate acceptor levels in a semiconductor material. An n-type 4H-SiC substrate has been doped with gallium using a laser doping method for sensing the MWIR wavelength of 4.21 mm. The incident MWIR pho…
This paper describes a novel laboratory technique for characterizing the scale inhibitors performance of reverse osmosis. The experiment was carried out by operating the RO system in a once-through flow mode which was operated by continuous withdrawal of concentrate and permeate. The concentration ratio of reverse osm…
We consider the problem of simulating the thermodynamic and electrical processes involved in a solid to vapor-plasma transition of a copper wire of known dimensions when driven by a Pulse Forming Network (PFN). Assuming uniform cylindrical geometry of the wire, we formulate integral equations linking the decay in PFN…