Fig. 2
Assembly of Janus particles with patch ratio of χ = 0.13. a Bright-field images show self-assembled clusters of Janus particles at various temperatures. Particles disassemble at high temperature and self-assemble at low temperature at the DNA-coated surfaces, forming singlets and clusters of dimers, trimers, and tetramers. Scale bar = 10 μm. b Distribution of singlets and clusters of 2, 3, and 4 particles at different temperatures from experiment (left) and computer simulation (right). Singlets and dimers are dominant at high temperature while trimers and tetramers are dominant at low temperature. c Cluster fractions as a function of temperature from experiment (solid color bars) and computer simulation (hashed). The depth ε of the attractive effective potential due to DNA binding, indicated in each panel, is determined by choosing the values of kBT/ε in the simulations that best match the experimental distributions of cluster fractions for the different temperatures indicated in (b). Low temperature favors the formation of larger clusters, which are limited by geometry to four particles for the patch ratio χ = 0.13 shown here
