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Result of BSA patterning. (a) Phase contrast image showing air locked inside the micro-cavities after perfusion of BSA solution. BSA penetration is excluded from the micro-cavities. (b) Visualization of air-lock assisted BSA patterning using FITC labelled BSA solution. (c) Merged image of phase contrast and FITC-BSA fluorescent images to illustrate successful air-lock BSA patterning.
