Perpustakaan Digital ITB

This paper reports a novel disk-like micro-craft with dual off-centernozzle nanoengines, consisting of three different metals: gold, nickel, and platinum. Abubble propulsion mechanism originating from momentum change induced by thedetachment of oxygen bubbles is proposed to elaborate the self-steerable propulsionof the disk-like gold?nickel?platinum micro-craft. The as-proposed micro-craft isfabricated by a layer-by-layer deposition method based on the micro-electro-mechanical systems technology. Herein, the self-steerable propulsion of thefabricated micro-craft dispersed in deionized water with different hydrogen peroxideconcentrations is characterized. As a consequence, the speed of the micro-craft isincreased with the increment of hydrogen peroxide concentration. In addition, themicro-craft can always move forward linearly.