Fabrication of Heparinized Mesoporous Silica Nanoparticles as Multifunctional Drug Carriers

Figure 4

Survey XPS spectra of amino-modified MSNs (a); heparin-modified MSNs (b); XPS S 2p spectrum of heparin-modified MSNs (c); XPS N 1s spectrum of heparin-modified MSNs (d).

(a)

(b)

(c)

(d)