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Addition of bPEI‐AuNPs results in enhanced contractility of engineered cardiac tissues containing neonatal rat cardiomyocytes. a,b) MUSCLEMOTION‐based quantitative analysis of contraction (a) and contractility (b). c) Examples of engineered tissues' speed of contraction at different days post‐fabrication. n = 3 in triplicates. Data are mean ± SD and compared based on a two‐way ANOVA and Bonferroni's multiple comparison test. *p < 0.05.
