磷脂是一类含有磷酸的脂类，机体中主要含有两大类磷脂，由甘油构成的磷脂称为甘油磷脂（phosphoglyceride）；由神经鞘氨醇构成的磷脂，称为鞘磷脂 ...

(a) Preparation scheme. (b) Nanoparticles with varying PEG density on the surface. (c) Behavior in the blood circulation. (d) Delivery of luciferase mRNA.