Alignment, Rising, Sticking, and Phototaxis: Modulating the Behavior of Hematite Micropeanuts.

ABSTRACT: Artificial active colloids have been an active area of research in the field of active matter and microrobotic systems. In particular, light driven semi-conductor particles have been shown to display interesting behaviors ranging from phototaxis (movement toward or away from a light source), rising from the substrate, inter-particle attraction, attraction to the substrate, or other phenomenon. However, these observations involve multiple different designs of particles in varying conditions, making it unclear how the experimental parameters, such as pH, peroxide concentration, and light intensity, affect the outcomes. In this work, a peanut-shaped hematite semi-conductor particle was shown to exhibit a rich range of behavior as a function of the experimental conditions. The particles show r

SUBMITTER: Rivas DP 

PROVIDER: S-EPMC12334031 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature