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Biocompatibility of thin films with HUVECs. Cells are stained with Calcein AM (green) to indicate viable cells and propidium iodide (red) to signify dead cells. Incubation of cells with Plain TPU, TPU Composite and 0.025 wt% IR Dye resulted in a non-significant difference in viability compared to the control. No apparent changes in morphology or proliferation were observed due to the polymer composite, polymer or IRDye 800CW.
