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SEM images of gellan gum and the SPEs based on gellan gum and [Emim][SCN], and the corresponding EDS mapping images for C (carbon, red, 2b, 2e, 2j, and 2o), O (oxygen, green, 2c, 2f, 2k, and 2p), N (nitrogen, violet, 2g, 2l, 2q), and S (sulfur, yellow, 2h, 2m, 2r) atoms.
