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The TEM images (A) and SEM images (B) of CS-SA/DOX and CS-SA/SiO2/DOX-4, 8, 16, where a–d represents CS-SA/DOX, CS-SA/SiO2/DOX-4, CS-SA/SiO2/DOX-8 and CS-SA/SiO2/DOX-16 respectively.
Abbreviations: CS, chitosan; DOX, doxorubicin; SA, stearic acid; SEM, scanning electron microscopy; TEM, transmission electron microscopy.
