Publications

Four different types of FINs; amorphous Si (a-Si), annealed a-Si, polycrystalline Si (poly-Si) and crystalline Si (c-Si) were used to investigate the effect of interfacial strength and the length of structures on the physical cleaning window by measuring their collapse forces by atomic force microscope (AFM). A transmission electron microscope (TEM) and a nano-needle with a nano-manipulator in a scanning electron microscope (SEM) were employed ...

© 2018 Elsevier B.V. In this study, Cu nanoparticles prepared by chemical reduction method, were doped into flux (0–2 wt%) and disseminated to the pure Sn solder ball at 250. The enhanced spreading rate due to use of nanoparticles, increased the base diameter (W) and decreased the height (H) of the solder at constant volume. The finite element analysis for Cu concentration, temperature and velocity; in relation to the magnitudes of W and H show ...

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© 2012 American Chemical Society. The behavior of polymers confined in ultrathin films (thickness < 200 nm) can sensitively differ from that observed in macroscopic samples. Based on the simple arguments of finite size and interfacial effects, film thickness, and surface interactions should be sufficient to univocally determine the deviation from bulk behavior. However, recent models suggest that a third key parameter, namely, the interfacial ...

This paper studies the effect of interfacial areas (air-water interfaces and solid-water interfaces) on material strength of unsaturated granular materials. High-resolution X-ray computed tomography technique is employed to measure the interfacial areas in wet glass bead samples. The scanned 3D images are trinarized into three phases and meshed into representative volume elements (RVEs). An appropriate RVE size is selected to represent adequate ...

© 2018 The Authors. Colloidal suspensions of nanoparticles (nanofluids) are materials of interest for thermal engineering, because their heat transfer properties are typically enhanced as compared to the base fluid one. Effective medium theory provides popular models for estimating the overall thermal conductivity of nanofluids based on their composition. In this article, the accuracy of models based on the Bruggeman approximation is assessed. ...

Glass-ionomers (GIs) exhibit excellent clinical bonding effectiveness, but still have shortcomings such as polishability and general aesthetics. The aims of this study were (1) to determine the micro-tensile bond strength (microTBS) to enamel and dentin of a nano-filled resin-modified GI (nano-RMGI; Ketac N100, 3M-ESPE), and (2) to characterize its interfacial interaction with enamel and dentin using transmission electron microscopy (TEM). ...

Clustering of alumina inclusions in liquid steel commonly takes place during Al deoxidization process and the extent of clustering significantly influences steel cleanliness. The clustering is suggested to have a close relationship with the interfacial properties of alumina inclusions and liquid steel. In the present work, the effect of the interfacial properties on the clustering of alumina inclusions was investigated. Different amounts of Te ...

For the purpose of controlling the size of non-metallic inclusions in steel, the effect of interfacial properties of alumina inclusions and molten iron on the characteristics and clustering of alumina inclusions was investigated. The interfacial properties were modified by adding different amounts of Te to molten iron at 1873 K before Al deoxidization. When the melt is not stirred after Al addition, Te was found to decrease the size of alumina ...