(a) Py-gel pieces interact with γCD-gel pieces at xDMSO=0. (b) Py-gel pieces assemble with both βCD-gel and γCD-gel pieces at xDMSO=0.2. (c) Py-gel pieces prefer βCD-gel pieces at xDMSO=0.5. The insets were taken under irradiation with 365 nm light. The interaction between Py-gel and αCD-gel was not observed. Scale bar, 1.0 cm.