Science Advances

The PDF file includes:

• Fig. S1. Optical images of the PIPGF.
• Fig. S2. Recorded temperature of the PIPGF with different pathways.
• Fig. S3. Temperature change of the PIPGF during melting and solidification.
• Fig. S4. Melting and solidification times of the PIPGF.
• Fig. S5. Distributing different sample droplets.
• Fig. S6. PIPGF microreactor for grouping the blood samples B+ and O+.
• Table S1. Clotting times and sliding properties of the mixed blood droplets with different volume ratios of blood (A+) to antibody (anti-A).
• Legends for movies S1 to S3

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Other Supplementary Material for this manuscript includes the following:

• Movie S1 (.avi format). Droplet mobility on a tilted PIPGF surface.
• Movie S2 (.avi format). Programmed wettability pathways.
• Movie S3 (.avi format). Manipulating droplet reactions and blood grouping.