Self-assembly of nanoparticles can be controlled independently and/or cooperatively by light and magnetic field, as demonstrated by Rafal Klajn and co-workers on page 422. Dual-responsive nanoparticles are designed by functionalizing magnetic cores with lightresponsive ligands. These materials respond to both light and magnetic fields and can be assembled into various higher-order structures, depending on the relative contributions of these two stimuli. This strategy will enable controlled capture, delivery, and release of molecular/nanosized cargo.
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