Materials Literature
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We experimentally demonstrate metamaterials with extreme dispersions by coiling up space with curled channels. An acoustic metamaterial is constructed with conical dispersion, supporting negative refraction with airborne sound. We have also demonstrated a double-negative microwave metamaterial by guiding through the c…
The Ce0.8Sm0.2O1.9(SDC) interlayer was prepared by screen-printing method between LaBaCo2O5+δ(LBCO) cathode and 8YSZ electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The effect of SDC interlayer on the electrochemical performance of LBCO cathode was investigated. Experimental results showed…
The effects of Nb content on the microstructure and properties of microalloyed rephosphorized steel sheet are investigated by analyzing its microstructure and properties of as hot-rolled and as annealed. The results show that proper coiling temperature for full precipitation increases as Nb content increases. Mechanic…
In this presentation we review our recent studies of arrays of electrically small particles designed to perform general transformations of normally incident plane waves. We show that single-layer dipole arrays can, for example, act as matched polarization transformers, perfect absorbers, high-impedance surfaces, ideal…
Following an established concept of IR spectroscopy, the total absorber was transferred to the THz wavelength. This allows for measurement of effects interesting for life-science applications like DNA hybridization and molecular resonances. The complete process from simulations to measurements will be addressed.
Natural gas can be a raw material to produce synthetic liquid fuels via Gas to Liquid process (GTL). The process is consist of 4 main parts which are cleaning unit, reforming unit, Fischer-Tropsch unit (FT) and product upgrading unit. To evaluate potential of having this kind of process for Nongtum A Reservoir, Thaila…
Poly (hydroxyethyl methacrylate)-based composite cryogel with embedded macroporous cellulose beads (pHEMA-CB cryogel) could be of interest as chromatographic medium for bioseparation applications. In this work, liquid-solid phase transition characteristic of the suspension mixture containing HEMA, poly (ethylene glyco…
The purification of polyether polyols with low unsaturation was studied. The removal effect of residual double metal cyanide in the polyols by the methods of adsorption and precipitation-filtration is characterized by the residual concentration of the zinc and cobalt ions which is measured by Inductively Coupled Plasm…
In this work, graphene nanosheets (GNSs) were prepared by the thermal pyrolysis of graphene oxide (GO) at 900 °C for 3 h, and their electrochemical performances as anode materials for lithium ion batteries (LIBs) were also investigated. TEM and SEM images clearly showed that the as-prepared GNSs had a transparent two-…
Titanium (Ti) and its alloys have been widely used in orthopedic and dental applications. The bonding between Ti implants and tissues is significantly important in the clinical applications, which is highly relative to the characteristics of implant surface with surface improvement by various coatings such as hydroxya…
We develop farther our “three-level” approach to graphene metamaterials including “metamaterial treatment” of 2D beams of electron (BE) in graphene with 2D inhomogeneous and nonlinear electromagnetic waves in graphene-dielecric multlayered structres. A possibility of resonant behaviour of the components of the electro…
Based on the introduction of floating-gate silicon quantum dot single-electron memorizers structure and working principle, this paper builds corresponding lumping current and capacitance model to calculate the current with memory in the circumstance of linearity, saturation and sub-threshold. Taking advantage of the s…
Thin film transistors with nanoparticles silicon floating-gate are fabricated by plasma enhanced chemical vapor deposition. It should be noted that SiO2acts as both a tunneling and a blocking layer. Meanwhile, some np-Si dots are embedded within SiO2layers. The electrical characteristic of the devices are measured by…
Two-step growth method was used for CuInGaSe2,(CIGS) absorption layer in this study. The layer was first deposited by thermal evaporator to use indium and gallium sauces at a vacuum of 5 × 10-6 torr and secondly, the deposited thin film was enclosed in a quartz cartridge for the first selenization. The second seleniza…
Considering the distortion factor, the large power resistance spot welding (RSW) inverter power supplys actual power factor (PF) is very low. In this paper, the 3-phase 4-wire three-phase/switch/level (VIENNA) rectifier is proposed to realize the power factors correction (PFC). Firstly, an equivalent load model of the…
Squaraines are interesting organic molecules due to the strong absorption in the visible region (e ~105 M-1•cm-1), intense fluorescence emission and good photoconductivity presented in these dyes. These features make them useful in a variety of applications in the area of imaging, nonlinear optics, photodynamic therap…
Graphene with its unique electric, thermal, and optical properties has proven to be a promising candidate for many of the next generation electronics application. In this report, we try to provide a clear undeniable evidence that proves our success in the development of a THz nano-sensor using the graphene nano-carbon…
Residual strains near the sprues of ingots with different contents of Zn (6 wt. % and 9 wt. %) were measured using neutron diffraction. The results showed that the increase of Zn content decreases the residual stress in the hot sprue region. These results are good in agreement with that obtained by the measurement of…
Ultra-hard AlMgB14 (30-50 GPa) thin films were deposited on silicon substrate for a nominal thickness of 100 nm using a pulsed excimer laser and then subjected to direct micromachining using a 532 nm, 30 picosecond pulsed Nd:YAG laser. The application is targeted towards synthesizing an artificial nacre material compo…
PAN/POSS nanofibers membrane with different content POSS have been prepared by electrospinning. The morphology and thermal properties of PAN/POSS nanofibers are characterized by SEM and DSC, respectively. The addition of different content of POSS into PAN matrix have a slight effect on the diameter of nanofibers. Comp…