Abstract
Micromachines have garnered attention for their potential use in various applications, such as the fields of sensing, environmental remediation, and targeted drug delivery. The Janus micromachine that has an asymmetrical structure and important application potentials has received extensive attention. The self-propulsion of the Janus motor is produced by making full use of the solution environment. In this paper, we use a simple method to fabricate metal-oil micromechanics, which is called the Janus droplet micromachine. The Janus droplet micromachine is consisting of liquid olive oil and solid Al particles, which is driven by gas generated due to reaction between Al particles and alkaline solution. The whole motion process of the Janus droplet micromachine is investigated. In addition, direction control of the droplet micromachine with Fe particles added is demonstrated by applying external magnetic field. This solid–liquid composite Janus droplet micromachine has broad potential applications in drug transportation and other areas.
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