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. 2020 Jul 11;25(14):3176. doi: 10.3390/molecules25143176

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(A) The deconvoluted C1s XPS spectra of the untreated and CAP treated electrospun PLGA microfibers with different process’ parameters. Atomic content of (B) carbon, (C) oxygen and (D) O/C ratio obtained by XPS technique for the untreated and CAP treated PLGA microfibers. Bonds percentages of the C1s deconvolution regarding (E) C-C/C-H, (F) C-O and (G) C=O obtained by XPS technique for the untreated and CAP treated PLGA microfibers. (H) Changes in the Water contact angles (WCA) between untreated and CAP treated PLGA microfibers by varying the exposure time and working distance. (I) Ageing analysis to assess the stability of the CAP treated PLGA microfibers between day 0 and day 14. *, **, ***, and **** Statistically significant between the groups (p < 0.05, p < 0.01, p < 0.001, and p < 0.0001, respectively).

(A) The deconvoluted C1s XPS spectra of the untreated and CAP treated electrospun PLGA microfibers with different process’ parameters. Atomic content of (B) carbon, (C) oxygen and (D) O/C ratio obtained by XPS technique for the untreated and CAP treated PLGA microfibers. Bonds percentages of the C1s deconvolution regarding (E) C-C/C-H, (F) C-O and (G) C=O obtained by XPS technique for the untreated and CAP treated PLGA microfibers. (H) Changes in the Water contact angles (WCA) between untreated and CAP treated PLGA microfibers by varying the exposure time and working distance. (I) Ageing analysis to assess the stability of the CAP treated PLGA microfibers between day 0 and day 14. *, **, ***, and **** Statistically significant between the groups (p < 0.05, p < 0.01, p < 0.001, and p < 0.0001, respectively).