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In this paper, the Bi-11Ag solders with additions of 1wt.%, 3wt.%, and 5wt.% Sn are prepared to investigate the microstructure, melting characteristic, and tensile strength of the solder joint. The result shows that the melting temperature decreases to 154 °C as the Sn continuously added; the microstructure was refined when the addition of Sn was below 5wt.%, as it reach 5wt.% or more, the dendritic...
In this work, a lithography-free approach for fabricating patternable nanopillars is reported. The key technique of the approach is to introduce a gap over the substrate by covering it with a cap, which contains through holes and the material on its lower surface has similar etching rate with the substrate. By this means, uneven etching of the substrate is induced under the through holes, consequently,...
Drag reduction of liquid flows on solid/liquid interface has become an important issue with the development of microfluidics systems. Theoretical and experimental studies have shown that at the solid-liquid interface the presence of nanobubbles is believed to be responsible for boundary slip, and the size, quantity and distribution of nanobubbles on hydrophobic surface will influence the slip length...
A high-resolution PDMS-based conformable microelectrode array (cMEA) with integrated electronics is implemented. The cMEA is incorporated into individual layers of a nanofiber-based nerve regeneration scaffold to create a novel regenerative electrode scaffold (RES) capable of establishing a stable, high-resolution peripheral nerve interface. The device features a compact size with an enhanced signal-to-noise...
As the most popular device for terahertz (THz) generation and detection, photoconductive antenna has attracted a lot of attention in recent years. The conventional photoconductive antenna has a relatively omni-directional radiation pattern and not all the radiated power can be used in a typical THz system. This paper is aimed at developing a photoconductive horn antenna with a uni-directional radiation...
The fabrication of an electrically pumped lead salt- based edge-emitting laser on a polished [110]-oriented PbSnSe substrate is presented. The laser structure was grown by molecular beam epitaxy and consisted of a PbSrSe-PbSe multiple quantum- well active region sandwiched between PbSrSe confinement layers. Pulsed laser emission was observed at lambda = 5.2 mum wavelength up to 158 K with a maximum...
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