title: Surface complexation reaction for phase transfer of hydrophobic quantum dot from nonpolar to polar medium.
abstract: Chemical reaction between oleate-capped Zn(x)Cd(1-x)S quantum dots (Qdots) and 8-hydroxyquinoline (HQ) led to formation of a surface complex, which was accompanied by transfer of hydrophobic Qdots from nonpolar (hexane) to polar (water) medium with high efficiency. The stability of the complex on the surface was achieved via involvement of dangling sulfide bonds. Moreover, the transferred hydrophilic Qdots--herein called as quantum dot complex (QDC)--exhibited new and superior optical properties in comparison to bare inorganic complexes with retention of the dimension and core structure of the Qdots. Finally, the new and superior optical properties of water-soluble QDC make them potentially useful for biological--in addition to light emitting device (LED)--applications.
authors.affiliation: Department of Chemistry and ‡Centre for Nanotechnology, Indian Institute of Technology , Guwahati 781039, Assam, India.
authors.forename: Satyapriya
authors.initials: S
authors.lastname: Bhandari
authors.forename: Shilaj
authors.initials: S
authors.lastname: Roy
authors.forename: Sabyasachi
authors.initials: S
authors.lastname: Pramanik
authors.forename: Arun
authors.initials: A
authors.lastname: Chattopadhyay
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry; D017967:Zinc Compounds / Q000737:chemistry
chemical_list: D019187:Cadmium Compounds; D018036:Selenium Compounds; D017967:Zinc Compounds