University of Massachusetts Amherst

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Direct Surface Attachment Methods for the Preparation of Light Emitting Quantum Dot Nanoparticle - Poly(phenylene vinylene) Composite Materials
The composite materials prepared in this unique approach allow the properties of quantum dots (CdSe nanocrystals) to be exploited in electronic polymer materials, using only a very low loading of quantum dots relative to conventional approaches.


The effective dispersion of quantum dots within electronically active polymers, such as poly(para-phenylene), results in extensive interfacial contact between the quantum dots and polymer.  This generates an efficient energy transfer between the two components that cannot be achieved in conventional blends, where quantum dot aggregation prevents such efficient transfer. 


Key to this invention is the strategic use of organic functionality in both the nanoparticle growth step and the subsequent polymerizations that provide the composite materials.

Published: 11/18/2014   |   Inventor(s): Todd Emrick, Kevin Sill, Habib Skaff
Category(s): Nanotechnology, Electronics, Devices & sensors
A Rapid Interfacial Route to Produce Water Dispersible Nanoparticles
This invention describes a simple direct route by which water-dispersed nano-particles can be prepared.  Water-oil dispersions with nanoparticles, the elemental composition of which allows the attachment of oil-soluble ligands, are shown to undergo a process at the oil-water interface that imparts a water solubility to the particles.  The nanoparticles are photoluminescent in both the oil-soluble and water soluble states.
Published: 11/18/2014   |   Inventor(s): Anthony Dinsmore, Todd Emrick, Yao Lin, Thomas Russell, Habib Skaff
Category(s): Nanotechnology, Biotechnology, Research tools