Fig. 2
Characterizations of CS@P. a HRTEM image of the CCF-LDHs. Scale bar = 50 nm. b AFM image and c represented the thickness of CCF-LDHs monolayer nanosheets. d EDS mapping of the CCF-LDHs nanosheets. XPS spectra of e Co 2p, f Cu 2p and g Fe 2p. h T2 relaxation versus Fe concentration of CCF-LDHs and inset shows the corresponding T2-weighted images. i Zeta potential of CCF-LDHs and C@P in pH 7.4 and 6.5 media. Error bars stand for ± SD (n = 3). Photothermal curves of C@P dispersion at different concentrations irradiated by 880 nm laser at 1.0 W/cm2 for 5 min in pH = 7.4 (j) and 6.5 (k), respectively. l siRNA loading analysis at different w/w ratios of CCF-LDHs to siRNA