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Depth-profiling X-ray photoelectron spectroscopy (XPS) analysis of interlayer diffusion in polyelectrolyte multilayers

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Academic year: 2021

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Fig. 1. Schematic of systems used to test (A) chitosan (CHI) diffusion into the hydrogen-bonded region and (B) electrostatic blocking-layer effectiveness.
Fig. 2. Diffusion of chitosan into hydrogen-bonded fi lms. Spectra of hydrogen-bonded (PAA3/PEO3) fi lms exposed to chitosan solution for different amounts of time: (A) 1-min exposure, (B) 3-min exposure, (C) 10-min exposure, and (D) 60-min exposure to chito
Fig. 3. High-resolution C1s XPS depth pro fi ling of a hy- hy-drogen-bonded fi lm exposed to chitosan solution for (A) 1 min and (B) 3 min
Table 2. pH sensitivity of the hydrogen-bonded region

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