Lamellar envelopes of semiconductor nanocrystals.
We report the solution-phase formation of ordered lamellar nanocrystal (NC) arrays. These semiconductor lamellae exhibit structural integrity and temporal stability, without recourse to chemical cross-linking. They are many micrometers in diameter yet only two or three nanocrystal layers in thickness. We show that these structures can integrate a cargo of water-soluble ions, molecules, metal nanoparticles, or biomolecules. Encapsulation of gold nanoparticles is found to cause photoluminescence enhancement of the host CdSe nanocrystals. These easily prepared nanocrystal "envelopes" promise properties modulated through the integration of a vast array of water-soluble species. Our approach marks a step toward ordered, compartmentalized, NC-based complexes with controlled architectures.
Lee
Anna
A
Department of Chemistry, Institute for Optical Sciences and Centre for Quantum Information and Quantum Control, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6 Canada.
Coombs
Neil A
NA
Gourevich
Ilya
I
Kumacheva
Eugenia
E
Scholes
Gregory D
GD
D019187:Cadmium Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D005453:Fluorescence; D053758:Nanoparticles / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000737:chemistry; D010316:Particle Size; D045663:Quantum Dots; D018036:Selenium Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D012666:Semiconductors; D013499:Surface Properties
D019187:Cadmium Compounds; D009943:Organophosphorus Compounds; D018036:Selenium Compounds; C044965:trioctyl phosphine oxide; C058667:cadmium selenide