Surface passivation of luminescent colloidal quantum dots with poly(dimethylaminoethyl methacrylate) through a ligand exchange process

Xiao-Song Wang; Tieneke E Dykstra; Mayrose R Salvador; Ian Manners; Gregory D Scholes; Mitchell A Winnik

doi:10.1021/ja0489339

Surface passivation of luminescent colloidal quantum dots with poly(dimethylaminoethyl methacrylate) through a ligand exchange process

J Am Chem Soc. 2004 Jun 30;126(25):7784-5. doi: 10.1021/ja0489339.

Authors

Xiao-Song Wang¹, Tieneke E Dykstra, Mayrose R Salvador, Ian Manners, Gregory D Scholes, Mitchell A Winnik

Affiliation

¹ Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, M5S 3H6 Ontario Canada.

PMID: 15212519
DOI: 10.1021/ja0489339

Abstract

Polydimethylaminoethyl methacrylate (PDMAEMA) was used as a multidentate ligand to modify the surface of CdSe/ZnS core-shell colloidal quantum dots in toluene with trioctylphosphine oxide (TOPO) as the surface ligand. Adsorption of PDMAEMA was accompanied by release of TOPO. The process is free of agglomeration, and the modified nanocrystals become soluble in methanol. The photoluminescence properties are well-preserved in either toluene or methanol.