Materials Literature
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The slime mould Physarum polycephalum is a suitable candidate organism for soft-matter robotics because it exhibits controllable transport, movement and guidance behaviour. Physarum may be considered as a smart computing and actuating material since both its motor and control systems are distributed within its undiffe…
Self-assembled polymer nanocomposites are a promising class of advanced materials with unique structures and tunable properties. Control over the spatial arrangement and ordering of the constituent material is essential to developing composites with defined morphologies and properties. Here I report the synthesis of p…
Ab initio restricted Hartree-Fock method within the framework of large unit cell formalism is used to investigate the electronic structure of the core and oxidized surface of AlAs nanocrystals. Large unit cells of 8, 16, 54, 64 and 128 atoms are used in the present analysis. Calculations are performed utilizing the Ga…
The experimental observation of the quantum Hall effect in a two-dimensional electron gas posed an intriguing question to theorists: Why is the quantization of conductance so precise, given the imperfections of the measured samples?The question was answered a few years later, when a connection was uncovered between th…
본 연구에서는 보다 효율적인 광 전기화학적 수소제조를 위하여 광촉매로써 산화텅스텐에 티타늄을 함침하여 Ti/WO 3 나노입자를 제조하였다. 제조한 Ti/WO 3 의 물리적 특성은 X-선 회절분석법(XRD), 주사전자현미경(SEM), 발광분광계(PL), 원자간력 현미경(AFM), 정전기 현미경(EFM)을 통해 확인하였다. 메탄올/물 (1/1) 광분해 수소제조 실험 결과, 순수 아나타제 티타니아나 산화텅스텐 광촉매보다 Ti/WO3 광촉매에서 촉매활성이 향상되었으며, 0.5 g의 0.10 mol % Ti/WO 3 촉매를 사용한 경우 8시간 반응 시 3.02 mL의 수소가…
최근 저가의 풍부한 재생 가능 천연자원인 식물성 오일에 대한 관심이 증가되고 있다. 식물성 오일은 친환경적인 생분해성 고분자 물질들의 원료로서 사용될 수 있다. 본 연구에서는 acrylated epoxidized soybean oil (AESO)과 2-aminoethanol의 중합 반응에 의해 poly( ${\beta}$ -amino ester)를 합성하였다. AESO와 2-aminoethanol의 몰비를 변화시켜 다양한 비율의 고분자 필름을 제조하였다. FT-IR을 이용하여 poly( ${\beta}$ -amino ester) 내의 C-N 결합의 생성을 확인하였으…
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Growth of nickel tip carbon nanorod by means of pulsed plasma chemical vapor deposition (PPCVD) was carried out at different deposition time. Effects of deposition time under the methane plasma on the growth of carbon nanorod were investigated. The nucleation and growth mechanism of nickel tip carbon nanorod were also…
A novel low-cost shunt hybrid active power filter for power quality in high voltage system is proposed in the paper. The active power filter is based on three-phase four-switch structure. An inductor is parallel in the second-side of the transform, instead of connected in the first-side of transform. An improved SVPWM…
Ti2SC has been synthesized using Ti/TiS2/2TiC as initial materials. Combining X-ray diffaraction analysis with thermodynamic calculations, a reaction path is proposed for the intermediate phase TiS and Ti2SC formation. TiS was more possible to be obtained from TiS2 and Ti rather than the decomposition of TiS2. TiC was…
Resumen: El siguiente trabajo consiste en una simulacion termoelectrica para un nuevo modelo del Sistema Anodico, con un yugo de 4 puntas centrado y un bloque anodico de dimensiones 1500 mm, 790 mm y 610 mm para ser usado en las Celdas de Reduccion de Aluminio Hal-230 de C.V.G VENALUM, realizado con el programa de ele…
Crushed brick foamed concrete block is made of crushed brick as a main raw material and Portland cement as a cementious material, mixed with various additives, foamed by foamer and cured under the ordinary temperature and pressure condition. Studies have shown that: (1) The main chemical composition of CBP are SiO2 an…
Nanosized Fe0.1Zn0.9Mn2O4 particles were prepared by hydrothermal method in absence and presence of surfactants. Transmission electron microscopy (TEM), scanning electron microscopy (SEM) and powder x-ray diffraction (XRD) techniques were employed for the characterization of the nanoparticles. Photocatalytic activity…
At the beginning stage of the progressing cavity pump (PCP) operation or working in the oil well with high gas content, the stator and rotor of PCP usually operate under dry sliding. Analyzing the wear morphology of stator rubber and discussing wear mechanism are very important for choosing the best stator rubber for…
Controlled release of drugs at the tumor site and the development of non-invasive monitoring techniques are two of the main challenges currently facing antitumoral therapies. The paper analyzes some of the potential uses of liposomes as vehicles for the transport of drugs to the tumors, particularly directionalized va…
Electro-migration effect in Cu-OSP and ENIG pad finish in flip chip package were investigate. A temperature of 398 K with a current density of 1.5×104A/cm2 was applied. For EM phenomena were investigated using SAC solder composition of different pad finish. The diameter of the bumps was about 100 mm. Through this rese…
The present investigation is about fabrication of single-crystalline ceria (CeO2) nanoparticle by a hydrothermal route. High surface area CeO2 was synthesized with transformation of morphology from nanofibers to nanocubes in response to processing conditions. A steady variation of average nanocrystallite size ca. in t…
PZT thin films embedded with WO3 nanoparticles were prepared by a hybrid chemical solution process. WO3 at 0, 0.1, 0.2, 0.3, 0.4, 0.5 and 1 wt% nanopowders were suspended in an organometallic precursor solution of PZT, and then coated on platinized silicon substrate using spin-coating technique. The increase of WO3 re…
In recent years, hydrogenated nanocrystalline silicon (nc-Si:H) film has received much attention due to its potential application in various optoelectronic devices. In the present work, nanocrystalline silicon (nc-Si) films were fabricated from SiH4 diluted with H2 in very high frequency (40.68 MHz) plasma enhanced ch…
Separation of different electrochemical and ohmic contributions to the current/voltage U(i) characteristics requires additional experimental techniques like Electrochemical Impedance Spectroscopy (EIS). The application of EIS is an approach to determine parameters which have proved to be indispensable for the characte…