Preparation and Characterization of Novel Perfluorooctyl Bromide Nanoparticle as Ultrasound Contrast Agent via Layer-by-Layer Self-Assembly for Folate-Receptor-Mediated Tumor Imaging

Table 2

Composition of the PFOB nanocore templates.

Groups	Factors
	PFOB (μL)	Egg lecithin (%, w/v)	LutrolF68 (%, w/v)	Oleic acid (%, w/v)
	A	B	C	D
1	3	2	3	1
2	3	3	1	2
3	2	1	3	2
4	2	3	2	1
5	2	2	1	3
6	1	3	3	3
7	1	1	1	1
8	3	1	2	3
9	1	2	2	2