File Name : figure s1.pdf Caption : figure s1. schematic illustration of the microfluidic channel used in the experiments. (a) the inlet serves as the entry point for the liquid, which then flows through a microchannel (height = 3µm) connected to it. (b) the microfluidic channel structure: (i) the region of the channel with the smallest cross-sectional area. (ii) the area in which the cytocompatibility test shown in figure 5 is conducted. (c) a top view of (b-i) (left), and a side view of the x–x' region (right); the cross-sectional area is 11.5 × 3 µm². (d) a schematic of capillary flow along the channel. t0 denotes the time when liquid is introduced at the inlet. subsequently, t1, t2, and t3 illustrate the progression of the liquid over time. File Name : figure s2.pdf Caption : figure s2. optical transparency and wettability of hydrophilic pdms with varying block copolymer concentrations. contact angle at 2 mins (a) and optical transparency (b, c) of hydrophilic pdms prepared by mixing sylgard 184 with varying concentrations (0.1–1.5%) of pdms-peg block copolymer. File Name : figure s3.pdf Caption : figure s3. contact angle of unused glass prior to pdms assembly. File Name : figure s4.pdf Caption : figure s4. the linearity of cyclic siloxane intensity with respect to the concentration of d3, d4, and d5 (100 and 200 ppm) analyzed by gc-ms. while d4 (retention time: 13.2 mins) and d5 (retention time: 18.2 mins) exhibited linearity in peak area with increasing concentration, d3 (retention time: 6.7 mins) was excluded from the analysis due to peak overlap with the solvent signal, preventing accurate evaluation. File Name : figure s5.pdf Caption : figure s5. gc-ms intensity analysis of block copolymers at different concentrations (100 and 200 ppm). no significant peak differences were observed, making further analysis unfeasible. File Name : figure s6.pdf Caption : figure s6. plasma treatment bonding test of bare and hydrophilic pdms. pdms blocks and cover slips were subjected to o2 plasma treatment (50 w, 60 s), followed by immediate assembly. the assembled samples were then incubated at 70 °c for 30 mins to enhance bonding strength (a after incubation, the pdms-glass assemblies were manually tested to assess irreversible bonding. as shown in (b), bare pdms formed strong, irreversible bonds with the glass substrate, while hydrophilic pdms containing 0.3% block copolymer did not bond effectively. File Name : figure s7.pdf Caption : figure s7. a graph showing the ratio of damaged cells by the days of post-assembly. File Name : figure s8.pdf Caption : figure s8. schematic illustration of wetting behavior in block copolymer-added hydrophilic pdms.