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Figure 4
Core-shell phase transition in air. Morphology evolutions of (a) MC and [(e), top view; (i), side view] CS in air at 37°C and RH 75%. The scale bar is 50 µm. SEM images of surface and cross-section of (b)–(d) MC, (f)–(h) and (j)–(l) CS selected after 36 h. The onset transition time of (m), (o) MC and (n), (p) CS in air at temperatures from 22 to 37°C and RHs ranging from 12 to 75%.

ISSN: 2052-2525