Fig. 2: Scratch resistance measurements on pristine PDA film, LAPDA film, and inorganic substrates. | Nature Communications

Fig. 2: Scratch resistance measurements on pristine PDA film, LAPDA film, and inorganic substrates.

From: Laser-induced graphitization of polydopamine leads to enhanced mechanical performance while preserving multifunctionality

Fig. 2

Representative scratch depth–lateral displacement curves at a 50 µN and b 500 µN, respectively. c Scratch depths for LAPDA films annealed at 0.9, 1.2, and 1.9 W were compared. Bars represent mean values and original data points overlaid as purple dots; error bars represent standard deviation. Statistical significance (asterisk symbol) was assessed using a one-way analysis of variance with Tukey’s post-test (n = 5). d, e Corresponding scratched images on the substrates of (a, b). The scale bar is 2 µm. Source data are provided as a Source Data file.

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