Fig. 4: Assembly of three monomeric particles into a particle chain.

a A microrobot approaches cargo particle 1 (labeled with a green dot). b The microrobot, loaded with cargo 1, approaches another monomeric particle (orange), which serves as the drop-off location for cargo release. c The cargo particle sticks to the orange particle via induced dipole-dipole forces, while the microrobot is maneuvered towards cargo particle 2 (turquoise). d The microrobot loaded with cargo 2 heads back towards the drop-off location to release the cargo. e The two cargo particles and the orange target particle are assembled into a chain.