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SUMMARY:Copper Indium Sulphide Colloidal Quantum dots - Dr. Kevin Critchle
 y\, School of Physics and Astronomy\, University of Leeds\, Leeds\, LS2 9J
 T. United Kingdom.
DTSTART:20150608T131500Z
DTEND:20150608T141500Z
UID:TALK59741@talks.cam.ac.uk
CONTACT:Leona Hope-Coles
DESCRIPTION:Quantum dots have unique properties which have been intensely 
 studied for many promising technological applications.  For example unique
  properties of semiconductor nanoparticles are ideally suited for fluoresc
 ence imaging.  Advanced fluorescence imaging will provide a high-resolutio
 n means of detecting diseased cells\; tracking nano-encapsulated drugs\; a
 nd studying intracellular mechanisms.  These semiconductor nanoparticles a
 re commonly known as quantum dots - derived from the fact that decreasing 
 the size of the nanoparticles introduces quantum confinement of the charge
  carriers leading to an increased band-gap.  By tuning the size of the sem
 iconductor one can therefore tune the emission wavelength.   To date\, the
  most studied semiconductor nanoparticles are cadmium-based (CdTe\, CdSe\,
  and CdS). These cadmium based quantum dots have excellent optical propert
 ies\, stability\, and monodisperisty.  However\, increasing global restric
 tions and lack of biocompatibility of cadmium has lead to questions about 
 the future of quantum dots for many applications.  It is therefore essenti
 al that we investigate alternative quantum dot materials.   We have focuse
 d our attention on the development of copper indium sulphide quantum dots\
 , which have an ideal bulk band gap\, lower toxicity\, small size and abil
 ity to control surface functionality.  The properties of these recently de
 veloped quantum dots are discussed and I will be presenting recent results
  from SuperSTEM anaylsis.
LOCATION:Mott Seminar Room (Mott Building Room 531)\, Cavendish Laboratory
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