Fig. 2: Morphology and spectral characterizations of PyTTA-TPA COF films. | Nature Communications

Fig. 2: Morphology and spectral characterizations of PyTTA-TPA COF films.

From: Two-dimensional covalent organic framework films prepared on various substrates through vapor induced conversion

Fig. 2

a Photograph of 2D PyTTA-TPA COF film grown on a SiO2/Si substrate. b Optical image of PyTTA-TPA COF patterns. Scale bar 100 μm. c High-magnification optical image of the PyTTA-TPA COF film. Scale bar 50 μm. d AFM image of the 2D PyTTA-TPA COF film with a thickness of ~2.2 nm. Scale bar 2 μm. e, f C1s and N1s XPS spectra of 30-nm-thick PyTTA-TPA COF film. g FT-IR spectra of 30-nm-thick PyTTA-TPA COF film, PyTTA and TPA powder. h Raman spectra of 30-nm-thick PyTTA-TPA COF film, PyTTA and TPA COF powder. i A contour map with multiple sets of normalized Raman data selected from Raman mapping data.

Back to article page