Abstract
In aqueous solution of degraded undaria pinnatifida charv. suringer polysaccharide (DUP), excessive L-ascorbic acid (Vc) reacted with selenium dioxide (SeO2) to form selenium nano-particles (Se-0) at room temperature. It was characterized by transmission electron microscope(TEM), laser light scattering image and Resonance Rayleigh Scattering(RRS) to study the function of DUP in the modulation and stabilization of selenium nano-particles. The results show that DUP can modulate the reaction rate, modify the surface of selenium particles and control the diameter of selenium particles. When the concentration of Se-0 was 0.0507 to 3.245 mmol/L, the average diameter of selenium particles modified by DUP was 24 to 64 nm, and the selenium particles were sphere. The nanometer Se-0 sol-gel can be preserved for more than a month in aqueous solution of DUP at 4 degrees C.