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. 2017 Mar 28;7:456. doi: 10.1038/s41598-017-00433-z

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© The Author(s) 2017

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Thickness growth profile and TEM cross-sectional images. (A) Thickness growth profile of a spray-assisted LbL-assembled (PDAC/PSS)_n(GO+/GO−)_n film. (B) TEM cross-sectional images of (PDAC/PSS)₂₅(GO/GO)_20.5 and (C) (PDAC/PSS)₂₅(GO/GO)_40.5. A higher magnification image is shown in the inset, which represents LbL-assembled GO sheets.