PEI-PEG-Coated Mesoporous Silica Nanoparticles Enhance the Antitumor Activity of Tanshinone IIA and Serve as a Gene Transfer Vector

Figure 2

Characterization of nanoparticles. (a–d) The size distribution of nanoparticles. (e–h) The zeta potential of nanoparticles. (i–l) Nanoparticle morphological features were analyzed with TEM at different magnification ratios. (i, j) MSN. (k, l) MSN-TanIIA-PEG. (m) Cumulative drug release curve in vitro.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)

(j)

(k)

(l)

(m)