Corrosion of light powered Pt/TiO2 microrobots. (September 2020)

• Record Type: Journal Article
• Authors: Maric, Tijana; Nasir, Muhammad Zafir Mohamad; Budanovic, Maja; Alduhaish, Osamah; Webster, Richard D.; Pumera, Martin
• Is Part Of: Applied materials today. Volume 20(2020)
• Publication Date: 2020-09
• Subjects: Microrobots -- Self-propelled -- Micromachines -- Photocatalysis; Materials science -- Periodicals; Materials -- Research -- Periodicals; 620.1105
• DOI: 10.1016/j.apmt.2020.100659
• Languages: English
• ISSNs: 2352-9407

Abstract

Highlights: Pt/TiO2 photo powered micromachines undergo corrosion. Pt/TiO2 loose ability to move under photocatalytic fuel-free mechanism due to corrosion. Pt/TiO2 remain active for H2 O2 bubble propulsion mechanism despite corrosion. Abstract: Catalytic light-powered microrobots have become a major focus in the current autonomous self-propelled micromotors research. The attractiveness of such machines stems from the fact that these motors are liquid "fuel-free", with their motion modulated by irradiation. It is assumed that as catalytic micro/nanoparticles, they can function eternally. We show here that Pt/TiO2 photo powered micromachines undergo corrosion and that they lose catalytic activity several days after deployment. Graphical abstract: Image, graphical abstract