Figure S7 shows the FTIR spectra of the nylon-11 SQ thin film and MQS film measured at room temperature. The spectra are normalized to 2852 cm−1, the absorption band of symmetric CH2 stretching (3). The spectra for the SQ thin film were shifted vertically for clarity. The regions 500 to 800 cm−1 consist of the amide VI and V bands and appeared at 586 and 690 cm−1 for the SQ thin film, respectively. Comparing peaks with the MQS film gives an indication of the same phase (δ′) in both the MQS film and the SQ thin film. The progression bands from the methylene sequence appeared from 1100 to 1400 cm−1, showing no periodic change in the intensities of all films. A shoulder at 1420 cm−1 (CH2 scissoring band) for both films shows same conformations in C─C bond near CO-vicinal CH2 group (24). The hydrogen-bonded N─H stretching was observed at 3292 cm−1 for both the SQ thin film and the MQS film.

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