Light-controlled assembly of active colloidal molecules.


Journal article


Falko Schmidt, Benno Liebchen, Hartmut Löwen, Giovanni Volpe
Journal of Chemical Physics, vol. 150(9), 2019 Feb 7, pp. 94905-94905

View PDF Link to article
Cite

Cite

APA
Schmidt, F., Liebchen, B., Löwen, H., & Volpe, G. (2019). Light-controlled assembly of active colloidal molecules. Journal of Chemical Physics, 150(9), 94905–94905.

Chicago/Turabian
Schmidt, Falko, Benno Liebchen, Hartmut Löwen, and Giovanni Volpe. “Light-Controlled Assembly of Active Colloidal Molecules.” Journal of Chemical Physics 150, no. 9 (February 7, 2019): 94905–94905.

MLA
Schmidt, Falko, et al. “Light-Controlled Assembly of Active Colloidal Molecules.” Journal of Chemical Physics, vol. 150, no. 9, Feb. 2019, pp. 94905–05.


Abstract:
Thanks to a constant energy input, active matter can self-assemble into phases with complex architectures and functionalities such as living clusters that dynamically form, reshape, and break-up, which are forbidden in equilibrium materials by the entropy maximization (or free energy minimization) principle. The challenge to control this active self-assembly has evoked widespread efforts typically hinging on engineering of the properties of individual motile constituents. Here, we provide a different route, where activity occurs as an emergent phenomenon only when individual building blocks bind together in a way that we control by laser light. Using experiments and simulations of two species of immotile microspheres, we exemplify this route by creating active molecules featuring a complex array of behaviors, becoming migrators, spinners, and rotators. The possibility to control the dynamics of active self-assembly via light-controllable nonreciprocal interactions will inspire new approaches to understand living matter and to design active materials.
A binary mixture of light-absorbing and non-absorbing particles self-assemble into active colloidal molecules under homogenous illumination.

Share