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. Author manuscript; available in PMC: 2019 Jan 25.
Published in final edited form as: Conf Proc IEEE Eng Med Biol Soc. 2016 Aug;2016:267–270. doi: 10.1109/EMBC.2016.7590691

Figure 4.

Figure 4.

(a) Hydrophilic surface treatment of 3D-printed microfluidic chip for capillary-driven auto-mixing; the contact angle (θ) of DI water shows the hydrophilicity of PDMS, glass, and printed resin before and after treatment. (b) FTIR analysis of surface chemistry of 3D printed resin before and after surface treatment.