This work was supported by the National Natural Science Foundation of China (No.81171829, No.51473152, and No.51573175) and the Fundamental Research hinds for the Central Universities (WK2060200012, WK3450000001). We also thank Prof. Li-hua Yang and Prof. Ye-zi You at the University of Science and Technology of China (USTC) for their kind help ill providing experimental reagents and instrunlents.
Chitosan (CS) is expected to be an ideal gene carrier for its high biosafety. In this work, CS with low molecular weight were prepared through the γ-ray radiation on the acetic acid solution of CS. The CS chains we...