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PEG-lipid functionalized AG was subjected to supercritical point drying followed by deposition of a thin layer of gold. (A–C) Gradual zoom-in reveals the adsorbed PEG-lipid molecules at high magnification. (D) A 4:1 mixture of amine terminated (top) and cyclic RGD peptide (cRGD) functionalized PEG-lipids (bottom) was used to promote cell attachment by integrin-mediated binding to cRGD. (E) Gold-coated pristine AG exhibits a smooth surface.
