Amino hydrophilic quantum dots with PEG,Ecalbio_specification/price/image

Q4 are prepared through covalently bounding polyethylene glycol(PEG)

linkers on the basis of carboxyl hydrophilic quantum dots（Q2）, that help

to prevent the non-specific interactions. The surface reactive group is –NH2,

Their zeta potential are from -10 mv to 0 mv, Their TEM sizes are about 6-10 nm.

Q4 are very stable in the pH range of 6 -12.