Fig. 1

Characterization of SeNPs@CS. (A, B) Representative TEM; (A) Images of SeNPs@CS. (C) Particle size distribution of SeNPs@CS. (D) Zeta potential of CS and SeNPs@CS. (E) UV spectra of CS and Se@CS NPs. (F) IR spectra of CS and SeNPs@CS. (G-I) XPS spectra of SeNPs@CS: (G) Survey spectrum, (H) C 1s spectrum, and (I) Se 3d spectrum