Materials Literature
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Sr 2 SiO 4 :Eu 2+ phosphors and Sr 2 SiO 4 :Eu 2+ , Dy 3+ persistent phosphors were synthesized by solid-state reaction method at 1300°C using SrCO 3 , SiO 2 (silica: 3 μ m and fumed silica: 7nm), Eu 2 O 3 (0.01 to 0.06 mol% Eu) and Dy 2 O 3 (0.005 to 0.02 mol% Dy) powders. The amount of the stable β- Sr 2 SiO 4 phase…
We study the temperature dependence of the electrical conductivity σ( T ) of TlGaTe 2 crystals under an electric field ( E = 181 V/cm). A strong sharp increase ( × 1500) in σ( T ) is observed at T = 242 K (along the c -axis) and T = 267 K (perpendicular to it). This increase is attributed to a transition towards a sup…
This study presents an approach to assess the bird strike resistance of an aircraft wing slat structure. The slat is made of 2024 aluminum that can be described by an elastic–plastic strain-rate-dependent model with damage. The bird ismodeled using smooth particle hydrodynamics. The constants included in the smooth pa…
Carbon aerogels are nanostructure porous carbon materials that are derived via a sol—gel process with resorcinol and formaldehyde and subsequent pyrolysis of the precursor aerogels. Due to their high surface area, electrically conducting network, and chemical inertness, carbon aerogels can be considered ideal electrod…
CO2Reforming of CH4 to syngas by Ni/γ-Al2O3 catalyst combined with cold plasma jet was investigated. The higher selectivity of H2 and CO, and higher energy efficiency were obtained compared with other kinds of plasmas. Under the experimental conditions of flow rate at CH4=200 NL/h, CO2=300 NL/h, N2=500 NL/h, the input…
417 Objectives Multi-functional nanoparticles (NPs) are expected to be a useful drug delivery carrier, since they may enter into and distribute through brain tissues to deliver drugs for the treatment of brain tumors or other CNS diseases. The development of noninvasive methods to quantify the distribution of delivery…
Photoluminescence properties of barium thio- and selenogallates doped with Eu 2+ , Ce 3+ and co-doped with Eu 2+ and Ce 3+ were studied in a temperature range of 10–300 K and an optical excitation intensity interval of 3 × 10 -4 –1.25 × 10 6 W/cm 2 . Barium thiogallates doped with europium and co-doped by both rare-ea…
Double quantum well (DQW) structures consisting of a ZnCdSe well and a ZnCdMnSe well separated by a ZnSe barrier are grown with molecular beam epitaxy (MBE). The DQW structures are characterized by using X-ray diffraction measurement and simulation. Thickness of each well layer is designed so that the lowest energy le…
The relationship between the ion flux of self-ionized sputtering and the static magnetic field supplied by DC coils was investigated by ion current measurements. The ion flux was clarified in order to increase the substrate ion current. The additional magnetic field perpendicular to the substrate increases the substra…
The integrity of beam-column joints in reinforced concrete (RC) frames,especially in a crucial zone, is essential for the satisfactory performanceof the whole structure. Therefore, the behavior of external connectionsbetween beams and columns is a significant parameter affecting theperformance of such R.C frames. An i…
On-line cleaning, prefilming and adding inhibitors of corrosion and scale technology to circulating water system in oil-gas processing plant was introduced. Different corrosion inhibitors and scale inhibitors were screened and the compatibility of the agents was also studied. The organic acid cleaning agent KL-111 was…
Robust p-SiOCH was deposited in a PECVD reactor using Si precursor with Si-C-C-Si bond structure. It achieved its elastic modulus of 8.4GPa at k=2.55, comparable to the reference silica-based p-SiOCH that has been widely evaluated among the major chipmakers. However, its post-integration k increase was ~0.1 on a 100nm…
An application using vertically aligned carbon nanotube (VACNT) as thermal interface material (TIM) in high-brightness LEDs is demonstrated. VACNT arrays have been synthesized on the top and the bottom surfaces of the aluminum heat slugs and integrated into the LED modules using the designed packaging process. The the…
This paper presents a novel design for a portable fuel cell system. Since the merits of supercapacitors in fuel cell systems have been explored before, this design adds functionality and uses supercapacitors as an energy storage medium that can store energy and initiate fuel cell operation. This method eliminates the…
This paper presents analysis of the influence of design choices on the performance of an interior permanent magnet synchronous machine with concentrated winding designed to operate at constant power over a wide (six to one) speed range. The influence that winding design and magnet field strength have on the balance be…
In the hybrid SAW-ED deposition system for conductive thin-layer, droplets generation depend upon the SAW. Also, the electrostatic field can help pull off the droplets to the substrates. In this paper, the efficiency of hybrid SAW-ED head is studied analytically. For the development of hybrid SAW-ED deposition system,…
Cz-growth of ferroelectric LaBGeO5single crystals is reported. The crystal growth was carried out along the [0001]-axis with pulling rates ranged in 0.5~2.5mm/h and crystal rotation rates of 15~25 rpm in N2-, air and O2-flowing. A N2and air-flowing resulted in crystals with misoriented subgrains, while an O2-flowing w…
A comparative analysis of dielectric polarization processes in undoped and Bi-doped layers of modified As 2 Se 3 has been performed. It is established that both the similarity and difference in polarization phenomena are due to specific features of the internal structure of studied materials. The mechanism of the obse…
Ultrafast passively mode-locked lasers with spectral tuning capability and high output power have widespread applications in biomedical research, spectroscopy and telecommunications. Currently, the dominant technology is based on semiconductor saturable absorber mirrors (SESAMs). However, these typically have a narrow…
We review our efforts on atomic layer deposition (ALD) processes of Co and Ni thin films and their applications for nanoscale contact. First, PE-ALD Co processes was developed using various metal organic precursors and NH3plasma as a reactant. At optimal conditions, highly pure Co films were deposited with low resisti…