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. 2020 Jul 12;277:128320. doi: 10.1016/j.matlet.2020.128320

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Fig. 1 — Synthetic route and characterization of the modified cellulose microfibers. (a) Synthetic route of the microfibers. (b) SEM images. The red arrows indicate the MSNs modified onto the microfibers. (c) Silica contents (w/w) of the modified microfibers revealed by ICP assays. * indicates significant difference between the groups (P < 0.05). (d) Amplified SEM image and EDS mapping of CEL-PGA-MSN. (e) XPS spectra of CEL-PGA-MSN. Left, whole spectrum; right, Si2p spectrum. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)