Fig. 1. Schematic of the type of lipid nanoparticle structures. (a) Liposomes are typically composed of natural or artificial phospholipids, a major component of most biological membranes. (b) Solid lipid nanoparticles are composed of a mixture of solids. (c) Lipoplex is a liposome that has lipid multilayers with multilamellar structures. (d) Cubosome is a lipid crystalline particle composed of amphiphilic phospholipids with a cubic liquid crystalline phase.
