Fig. 2

Characteristics of HEHPA. a and b TEM image of HEHPA nanoparticles (inset shows a high-resolution TEM image of randomly selected HEHPA nanoparticles), c DLS data of HEHPA nanoparticles and d zeta-potential value of each nanoparticle (n = 4) to show each component conjugated on surface of HEH