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Surface structures for enhancement of quantum yield in broad spectrum emission nanocrystals

United States Patent

July 22, 2014
View the Complete Patent at the US Patent & Trademark Office
Disclosed are inorganic nanoparticles comprising a body comprising cadmium and/or zinc crystallized with selenium, sulfur, and/or tellurium; a multiplicity of phosphonic acid ligands comprising at least about 20% of the total surface ligand coverage; wherein the nanocrystal is capable of absorbing energy from a first electromagnetic region and capable of emitting light in a second electromagnetic region, wherein the maximum absorbance wavelength of the first electromagnetic region is different from the maximum emission wavelength of the second electromagnetic region, thereby providing a Stokes shift of at least about 20 nm, wherein the second electromagnetic region comprises an at least about 100 nm wide band of wavelengths, and wherein the nanoparticle exhibits has a quantum yield of at least about 10%. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
Schreuder; Michael A. (Burnsville, MN), McBride; James R. (Nashville, TN), Rosenthal; Sandra J. (Nashville, TN)
Vanderbilt University (Nashville, TN)
13/ 115,001
May 24, 2011
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH This invention was made with government support under Grant DEFG0202ER45957 awarded by the United States Department of Energy and Grant IIP0646322 awarded as a SPIR Phase 2 grant by the National Science Foundation. The United States government has certain rights in the invention.