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Monolayer Silane‐Coated, Water‐Soluble Quantum Dots
Author(s) -
Zhang Xi,
Shamirian Armen,
Jawaid Ali M.,
Tyrakowski Christina M.,
Page Leah E.,
Das Adita,
Chen Ou,
Isovic Adela,
Hassan Asra,
Snee Preston T.
Publication year - 2015
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201501886
Subject(s) - monolayer , quantum dot , silane , water soluble , quantum yield , materials science , fluorescence , aqueous solution , aqueous medium , ligand (biochemistry) , chemical engineering , photoluminescence , nanotechnology , photochemistry , chemistry , optoelectronics , organic chemistry , composite material , optics , biochemistry , physics , receptor , engineering
A one‐step method to produce ≈12 nm hydrodynamic diameter water‐soluble CdSe/ZnS quantum dots (QDs), as well as CdS/ZnS, ZnSe/ZnMnS/ZnS, AgInS 2 /ZnS, and CuInS 2 /ZnS QDs, by ligand exchange with a near‐monolayer of organosilane caps is reported. The method cross‐links the surface‐bound silane ligands such that the samples are stable on the order of months under ambient conditions. Furthermore, the samples may retain a high quantum yield (60%) over this time. Several methods to functionalize aqueous QD dispersions with proteins and fluorescent dyes have been developed with reaction yields as high as 97%.