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Video of Nanocrystal Synthesis

Synthesis of CdSe nanocrystals by injection of cadmium and selenium precursors into a high boiling point coordinating solvent at 360 degrees C. Intense color results from the quantum confinement effect on the electron as a result of the nanocrystal size being less than the Bohr radius of the exciton. Thus, larger particle size results in a red-shift in the emission. A size series was generated by allowing the crystals to grow at 280 degrees C. Over a period of 2 minutes, the fluorescence spectrum from 515 nm to 635 nm was covered.

In the Press

"...Moungi Bawendi, Ph.D., and colleagues at the Massachusetts Institute of Technology have also developed 
an EGFR-targeted quantum dot capable of imaging live cells..."

"...The most common probes are the rainbow of fluorescent proteins such as green fluorescent protein (GFP) or
yellow fluorescent protein (YFP). These probes have the advantage that they can be genetically encoded as a 
fusion protein attached to the target protein, thereby circumventing the delivery challenge. However, their 
signals are relatively weak, they blink, and their color quickly fades when exposed to light. Most scientists 
have learned to live with these drawbacks.

To solve this problem, Alice Y. Ting and Moungi G. Bawendi of Massachusetts Institute of Technology have 
synthesized quantum dots that are half the hydrodynamic diameter of those that are commercially available. Ting 
can use these smaller quantum dots to study synaptic receptors; the commercial quantum dots don't fit in the 
neuronal synapse..."

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"Five MIT faculty members are among the 72 newly elected members and 18 foreign associates of the National 
Academy of Sciences--an honor that recognizes their distinguished and continuing achievements in original 
research.

Election to membership in the National Academy of Sciences (NAS) is considered one of the highest honors in 
American science or engineering. Those elected today bring the total number of active members to 2,025."

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"Two MIT professors are among eight winners of the 2007 Ernest Orlando Lawrence Award from the U.S. Department 
of Energy.The award, which consists of a gold medal, a citation and an honorarium of $50,000, honors scientists 
and engineers at mid-career for exceptional contributions in research and development that support the 
Department of Energy (DOE) and its mission to advance the national, economic and energy security of the 
United States." 

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