In this study, the authors report for the first time a wafer-scale method for fabricating vertical-aligned silicon nanotubes (SiNTs) on a silicon substrate using a combination of nanoimprint lithography (NIL) and metal-assisted chemical etching (MaCE) processes. The structural properties and adhesion strength characteristics of the prepared SiNTs are investigated via field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM) analysis, and adhesion test. And, the authors successfully demonstrate the feasibility of using the fabricated SiNTs in a Li-ion battery (LIB) anode, and their potential to enhance LIB technologies.
To develop high-performance de- or anti-frosting/icing devices based on transparent heaters, it is necessary to study the evaporation-rate control of droplets on heater surfaces. However, almost no research has been done on the evaporation-rate control of liquid droplets on transparent heaters. In this study, we investigate the evaporation characteristics of water droplets on transparent heater surfaces and determine that they depend upon the surface wettability, by modifying which, the complete evaporation time can be controlled. In addition, we study the defrosting and deicing performances through the surface wettability, by placing the flexible transparent heater on a webcam. The obtained results can be used as fundamental data for the transparent defrosting and deicing systems of closed-circuit television (CCTV) camera lenses, smart windows, vehicle backup cameras, aircraft windows, and sensor applications.
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