Quantifying Photochemical Propulsion in Light-Powered Janus Micromotors
Article 2026 en
Authors
KR
Katherinne I. Requejo
CC
Cristhian Cañari-Chumpitaz
VJ
Vida Jamali
Abstract
1 min read
Janus particles reveal transient propulsion forces with a median of 4.5-6.2 pN lasting on average 21-41 ms and reaching up to 20 pN under optical confinement. Simulations incorporating these transient forces reproduce the observed trajectories, confirming their role in driving active motion. Functionalization with long DNA polymers further enhances directional motion by reducing rotational diffusion. These results establish a single-particle framework for quantifying active forces in photocatalytic Janus particles and offer design principles for light-powered micromotors.
Jeff Peischl, Thomas B. Ryerson, J. Brioude, K. C. Aikin, A. E. Andrews, E. Atlas, Donald R Blake, Bruce C. Daube, J. A. de Gouw, E. J. Dlugokencky, G. J. Frost, Drew R. Gentner, J. B. Gilman, Allen H. Goldstein, Robert A. Harley, J. S. Holloway, J. Kofler, W. C. Kuster, P. M. Lang, P. C. Novelli, G. W. Santoni, M. Trainer, Steven C. Wofsy, D. D. Parrish
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