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This article reports the impact of nanovoids on macro-properties and its underlying physical mechanism in nanotwinned Cu films with nanovoids synthesized via magnetron sputtering. The results indicate the resistivity due to nanovoids is proportional to void porosity at 4K and the film hardness induced by nanovoids is proportional to void density in the slip plane while independent of void sizes. The...
This article discusses the fabrication of a quantum cascade laser by metal-organic-chemical-vapor-deposition (MOCVD). The emission spectrum of the fabricated laser was obtained. The threshold current density under pulse measurements was investigated against reciprocal cavity length.
Lap-shear tests were combined with elastic-viscoplastic constitutive modeling to study the shear behavior of Sn3.8Ag0.7Cu (SAC) solder ball joints. In the shear rate range of 0.005 mm/s to 0.7 mm/s, the peak shear force was attained an optimal rate (labeled as vo), around 0.3 mm/s. On either side of vo, the shear fracture behavior was quite different. Cross-section examinations of the remaining solder...
Major factors influencing the root-induced copper fractionation changes within the rhizosphere of maize, wheat, pea, and soybean seedlings were evaluated using a contaminated calcareous soil. The effects of acidification, alkalization, and introduction of root exudates were investigated by addition of acid, alkaline and root exudates from solution cultures, prior to incubation and copper fractionation...
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