title: Monolayer Silane-Coated, Water-Soluble Quantum Dots.
abstract: 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, AgInS2 /ZnS, and CuInS2 /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%.
authors.affiliation: Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 28807, USA.
authors.forename: Xi
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 28807, USA.
authors.forename: Armen
authors.initials: A
authors.lastname: Shamirian
authors.affiliation: Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 28807, USA.
authors.forename: Ali M
authors.initials: AM
authors.lastname: Jawaid
authors.affiliation: Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 28807, USA.
authors.forename: Christina M
authors.initials: CM
authors.lastname: Tyrakowski
authors.affiliation: Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 28807, USA.
authors.forename: Leah E
authors.initials: LE
authors.lastname: Page
authors.affiliation: Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 28807, USA.
authors.forename: Adita
authors.initials: A
authors.lastname: Das
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA.
authors.forename: Ou
authors.initials: O
authors.lastname: Chen
authors.affiliation: Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 28807, USA.
authors.forename: Adela
authors.initials: A
authors.lastname: Isovic
authors.affiliation: Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 28807, USA.
authors.forename: Asra
authors.initials: A
authors.lastname: Hassan
authors.affiliation: Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 28807, USA.
authors.forename: Preston T
authors.initials: PT
authors.lastname: Snee
mesh_terms: D019921:Biotinylation; D019187:Cadmium Compounds / Q000737:chemistry; D002482:Cellulose / Q000737:chemistry; D000067493:Dynamic Light Scattering; D057446:Hydrodynamics; D045663:Quantum Dots / Q000737:chemistry*; D012235:Rhodamines / Q000737:chemistry; D018036:Selenium Compounds / Q000737:chemistry; D012821:Silanes / Q000737:chemistry*; D012995:Solubility; D013440:Sulfides / Q000737:chemistry; D014867:Water / Q000737:chemistry*; D017967:Zinc Compounds / Q000737:chemistry
chemical_list: D019187:Cadmium Compounds; D012235:Rhodamines; D018036:Selenium Compounds; D012821:Silanes; D013440:Sulfides; D017967:Zinc Compounds; D014867:Water; D002482:Cellulose; C058667:cadmium selenide; C029773:rhodamine B; C031238:zinc sulfide
keywords: FRET; fluorescence; nanoparticles; nanotechnology; quantum dots