Fig. 5. Multimaterial linear and nonlinear clusters.

(A and B) Asymmetric dumbbells assembled from carboxylate PS/amine PS (merged fluorescence image) (A) and from PS and SiO₂ (overlay of fluorescence and bright-field image) (B). (C and D) Three-particle colloidal chains with a magnetic SiO₂ particle (left), a PS particle (middle), and a nonfunctionalized SiO₂ particle (right) [energy-dispersive x-ray (EDX) spectroscopy; see fig. S4]. Overlay of a fluorescence image with a bright-field image on the template (C) and SEM image after the printing of the particles onto a silicon substrate (D). (E and F) Surfactant-like colloidal chains with a magnetic SiO₂ particle followed by a tail of PS particles. Overlay of a fluorescence image with a bright-field image on the template (E) and SEM image after the printing of the particles onto a silicon substrate (F). (G and H) Trimers with a magnetic particle and two different PS particles. Overlay of a fluorescence image with a bright-field image on the template (G) and SEM image after the printing of the particles onto a silicon substrate (H). Scale bars, 5 μm.