Table 1

	PCS^a			ESCA^b
				PLGA502H^c Surfactant (Pluronic)^c
Sample	Size^d (nm)	PDI ^d,e	z-pot (mV)^d	C OO (1)^f 290.5 eV	COO–C–O (2)^f 288.5 eV	C –CH (3)^f (overlapped to (4)^f) 286.5 eV
PLGA502H NPs	171 (11)	0.09 (0.01)	−31 (2)	30.8	35.9	33.3
Neu5Ac-PLGA502 NPs	163 (5)	0.20 (0.02)	−37 (4)	36.0	35.4	28.6

^aPCS: Photon Correlation Spectroscopy analyses
^bESCA: Electron Spectroscopy for Chemical Analysis
^cAtomic composition and numbering of the components of PLGA502H NPs, PLGA and Pluronic.
^dThe values represent the means of at least three experiments; standard deviation in parentheses.
^ePDI: polydispersity index.
^fThe numbers indicate the carbon atom type

Table 1: Chemico-physical characterization and ESCA analysis of PLGA502H NPs and Neu5Ac-PLGA502 NPs