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Intelligent Predicting System for Modeling of Flexurally – Strengthened Reinforced Concrete Beams with CFRP Laminates

reinforced concrete beams strengthened with FRP laminates”, Cement and Concrete Composites 28, 102-114. [18] Dai, J ., Ueda, T., S ato, Y . and Ito, T. (2005), “Flexural Strengthening of RC Beams using Externa1Jy Bonded FRP Sheets Through Flexible Adhesive Bonding”, Proceedings of the Internationa1 Symposium on Bond behavior of FRP in Structures, International Institute for FRP in Construction, 205-214. [19] Dong, Y., Zhao, M. and Ansari, F. (2002), “Failure characteristics of reinforced concrete beams repaired with CFRP composites

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Morphological features in aluminum nitride epilayers prepared by magnetron sputtering

Abstract

The aim of this study is to characterize the surface topography of aluminum nitride (AlN) epilayers prepared by magnetron sputtering using the surface statistical parameters, according to ISO 25178-2:2012. To understand the effect of temperature on the epilayer structure, the surface topography was investigated through atomic force microscopy (AFM). AFM data and analysis of surface statistical parameters indicated the dependence of morphology of the epilayers on their growth conditions. The surface statistical parameters provide important information about surface texture and are useful for manufacturers in developing AlN thin films with improved surface characteristics. These results are also important for understanding the nanoscale phenomena at the contacts between rough surfaces, such as the area of contact, the interfacial separation, and the adhesive and frictional properties.

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Synthesis and electrical properties of silver nanoplates for electronic applications

Abstract

In this paper, silver nanoplates of 100 to 500 nm size were synthesized by reduction of silver nitrate with N,Ndimethylformamide, using poly(vinylpyrolidone) as a surfactant and ferric chloride as a controlling agent, at 120 to 160 °C for 5 to 24 hours. The influence of the concentration of ferric chloride, the reaction temperature and reaction time on the morphology of the product has been investigated by transmission electron microscopy, scanning electron microscopy and UV-Vis spectroscopy. The results indicated that the products obtained at the low reaction temperature and short reaction time in the presence of FeCl3 in the reaction solution were in the form of silver nanoplates, whose morphology was mainly triangular and hexagonal. In addition, the size and thickness of the nanoplates increased with increasing of the FeCl3 concentration. At a high reaction temperature and long reaction time, the truncated triangle and hexagonal nanoplates were mainly produced. Furthermore, the sintering behavior of nanoplates was studied and the results showed that sintering of the silver nanoplates started at 180 °C, and a typical sintering behavior was observed at higher temperatures. The incorporation of the silver nanoplates into the polymer matrix with micro-sized silver flakes led to an increase in the matrix resistivity in almost all cases, especially at high fractions and low curing temperatures. The curing temperature had an influence on the resistivity of the conductive adhesives filled with micro-sized silver flakes and silver nanoplates due to sintering of the silver nanoplates.

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Growth of intermetallic compound between indium-based thermal interface material and copper substrate: molecular dynamics simulations

References [1] FALAT T., PLATEK B., FELBA J., Hybrid Thermally Conductive Adhesives in Electronic Assembly Used as Thermal Interface Materials in: Dekker Encyclopedia of Nanoscience and Nanotechnology, Second Edition, Taylor and Francis, New York, 2013. [2] CALBERG B., YE L., LIU J., Mater. Lett., 75 (2012), 229. [3] CARLBERG B., LIU J., YE L., Proc. 3 Electron. Systemintegr. Technol. Conf. ESTC, Berlin, 2010. [4] RIDLEY N., J. Less-Common Met., 8 (5) (1965), 354. [5] STRAUMANIS M

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Investigation of physicochemical and tribological properties of transparent oxide semiconducting thin films based on Ti-V oxides

.M., Foerster C.E., Serbena F.C., J. Non-Cryst. Solids, 348 (2004), 131. http://dx.doi.org/10.1016/j.jnoncrysol.2004.08.138 [27] Bourhis E.LE, Metayer D., J. Non-Cryst. Solids, 272 (2000), 34. http://dx.doi.org/10.1016/S0022-3093(00)00113-7 [28] Zisman W.A., Handbook of Adhesives, Skeist, I., Ed: van Nostrand, NewYork, 1977 [29] Fowkes F.M., J. Adhesion, 4 (1972), 155. http://dx.doi.org/10.1080/00218467208072219

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Influence of plasma treatment on wettability and scratch resistance of Ag-coated polymer substrates

1 Introduction Development in science and technology is relevant with the production of innovative materials with their specific properties depending on application. Polymers with precisely defined properties play an increasingly important role in the development of modern technology. Especially, the growing interest in thin film coatings deposited on various polymers has been observed. Polymers are frequently used in different application fields, such as biomaterials, adhesive and protective coatings, microelectronic devices, thin-film technology and

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Microwave assisted biosynthesis of rice shaped ZnO nanoparticles using Amorphophallus konjac tuber extract and its application in dye sensitized solar cells

the dye sensitized ZnO photoelectrode and sealed with 30 µm thick thermal adhesive film. The iodide/triiodide redox electrolyte solution was filled into the space between the photoelectrode and the counter electrode through a hole made in the counter electrode, due to capillary action. After filling the electrolyte the hole were sealed using the adhesive film. With the same procedure five solar cells were constructed with each dye and their J-V characteristics were analyzed. 2.7 Characterization The crystalline properties of the prepared ZnO nanoparticles

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Synthesis and 3D-AFM surface topology of nanographene-like material extracted from sulfonated tri-, di- and monochloroacetic acid

1 Introduction It is well known that graphene is a flat monolayer of carbon atoms tightly packed into a two-dimensional honeycomb lattice, forming the basic building block for all carbon nanostructures [ 1 ]. Graphene showns many intriguing properties which makes it one of the most promising materials in the next decades [ 2 , 3 ]. In 2004, Novoselov et al. [ 4 ] developed a micromechanical exfoliation method that consisted of repeated peeling of graphite flakes, using adhesive tape until the thinnest flakes were obtained, which were then transferred

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Inkjet-printed flexible RFID antenna for UHF RFID transponders

for layers printing. Because of cracks that were revealed during track inspection, only one sample S7 was printed of 3 layers, other, marked as S1 to S6 had 2 layers. All the prints were made with a resolution of 400 dpi and print speed of 300 mm/s. After the printing processes, the Kapton sheet was placed in a dryer in order to carry out the thermal treatment. The sintering process was conducted at 220 °C for 60 minutes. Next, the samples were cut out from the Kapton sheet and measured. In the last stage the Elpox AX-15S silver conductive adhesive was used to

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