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We fabricate a Silicon thin film by metal-assisted chemical etching (MacEch). Generally, it is hard to make a large size silicon thin film. Here we demonstrate a low cost and simple method to lift off the silicon thin film from silicon wafer. Besides, the substrate is reusable, so we can fabricate many thin films from the same wafer. Thus, this method is competitive for commercial applications.
The interfacial reactions between (111) Cu single crystals and lead-free solders (pure Sn, Sn-0.7Cu and Sn-0.7Cu-0.1Ni) during solid-state aging at 150 °C were investigated in this study. The morphological evolution and the growth behavior of interfacial IMCs during short-period (0 to 100 h) aging process were studied. For the solders without Ni, the interfacial Cu6Sn5 grains displayed prism shape...
Fouling exists in almost every circulating cooling water system. It greatly harms to the operation of the system. According to their formation, fouling can be classified into crystallization fouling, particulate fouling, chemical reaction fouling, corrosion fouling, biological fouling, condensation fouling and mixed fouling. There are many factors influence fouling, and the main factors include the...
Highly semi-polar (101̅3) oriented and fine structural AlN films were successfully prepared on silicon substrate by rf magnetron sputtering in this research. The dependence of the nitrogen concentrations and the material characteristics of the films (crystalline structure and micro morphology) were investigated. The crystalline structure of the films was determined by X-ray diffraction (XRD) and the...
Leachate contains high concentrations of organic matter, ammonia, metals, and other toxic compounds, which may pose serious risks to ecosystems and human health. In order to set up the appropriate toxicological criteria for the leachate, leachate toxicity tests with various organisms need to be conducted. The objective of this investigation was to evaluate the toxicity of leachate using the protozoan...
The detection of partial discharge (PD) and the analysis of SF6 gas components in gas insulated switchgear (GIS) have great significance for the fault diagnosis and running state assessment of power equipments. In this paper, a method of detecting SF6 decomposition components caused by PD is proposed. Accordingly, multi-wall carbon nanotube (MWNT) films sensors which is used to detect PD of SF6 is...
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