Figure 2

SEM images of CSP (a,b), SMS-CSP (c,d), 70% PEG/SMS-CSP (e–g). EDS elemental mapping analysis of the 70% PEG/SMS-CSP (h).

SEM images of CSP (a,b), SMS-CSP (c,d), 70% PEG/SMS-CSP (e–g). EDS elemental mapping analysis of the 70% PEG/SMS-CSP (h).