Fig. 2

Structural characterizations and digital photo representation. HRTEM images of a APTES-COF-1 (scale bar: 100 nm), the inset shows the SAED pattern (scale bar: 0.5 nm). b PEG₃₅₀-CCM@APTES-COF-1, c PEG₁₀₀₀-CCM@APTES-COF-1, and d PEG₂₀₀₀-CCM@APTES-COF-1. Scale bar: 500 nm. e Representative green channel CLSM (Leica TCS SP8 STED 3X, Germany) image recorded for PEG₂₀₀₀-CCM@APTES-COF-1 dispersion, the green channel was excited at 488 nm and collected between 510 and 550 nm (scale bar: 200 nm). f Digital photographs of dispersions of free CCM, COF-1, PEG₃₅₀-CCM@APTES-COF-1, PEG₁₀₀₀-CCM@APTES-COF-1, and PEG₂₀₀₀-CCM@APTES-COF-1 in water stored at room temperature for 2 days