This paper reports the completion of four fundamental fluidic operations considered essential to build digital microfluidic circuits, which can be used for lab-on-a-chip or micro total analysis system ( TAS): 1) creating, 2) transporting, 3) cutting, and 4) merging liquid droplets, all by electrowetting, i.e., controlling the wetting property of the surface through electric potential. The surfa...

The material detachment mechanisms of ductile metal surfaces are studied experimentally during dry grinding operation in a simulated experiment with near single grit contact with the surface. The spectra of the cutting and thrust forces are recorded and analyzed. It is found that the thrust force changes its direction from a compressive to a tensile mode. The ratio between the thrust and cuttin...

Silk and silk fibroin, the biomaterial from nature, nowadays are being widely utilized in many cutting-edge micro/nanodevices/systems via advanced micro/nanofabrication techniques. Herein, for the first time to our knowledge, we report aqueous multiphoton lithography of diversiform-regenerated-silk-fibroin-centric inks using noncontact and maskless femtosecond laser direct writing (FsLDW). Init...

The GH4169 superalloy has the characteristics of high strength, strong thermal stability, large specific heat capacity, small conductivity, etc., but it is also a typical hard-to-cut material. When cutting this material with ordinary tools, force large, and temperature high, which leads to severe tool wear short service life. In order improve performance tools when GH4169, reduce temperature, e...

Abstract The dry machining strategy has recently received high attention in the field of metal cutting as it can eliminate environmental impacts associated with usage fluids. However, high-generated heat and severe tool wear are usually observed for operations. One suggested techniques to improve performance is utilize textured tools, reducing friction at chip-tool interface. In this study, thr...