Characterization of nanoparticles
The morphology of NPsA/siRNA/PTX, NPsB/siRNA/PTX and NPsAB/siRNA/PTX nanoparticles were examined using transmission electron microscopy (TEM, JEM-2100).
The average size, zeta potential and magnetic properties of nanoparticles were investigated using dynamic light scattering (DLS, Malvern Instruments, Westborough, MA, USA) and vibrating sample magnetometer (VSM, a Standard 7403 Series, Lakeshore) respectively.