User:Nicole Bonan/Notebook/Quantum Dots/2014/03/28
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Synthesis Protocol for Mn-doped ZnS nanocrystals with an Mn:Zn ratio of 1:7.5 and a final (Zn+Mn) concentration of 0.4mM
Observations and Data
Figure 1: Quantum Dots Fluorescence Data
The chart above showed the observations made of last week's quantum dot solutions under a UV light. Each column is a different solution (labeled at the top) and each row is a different concentration of manganese in the quantum dot solution.
From the observations made of the quantum dots under the UV light, blue quantum dots were almost always in solution while orange quantum dots were almost always out of solution. Orange dots seemed to appear when the concentration of manganese was higher and blue quantum dots seemed to appear when the concentration was lower, but this was not always the case. There didn't seem to be a major pattern for the appearance of orange vs. blue dots, so more dots were synthesized this week in order to do further research. One hypothesis for the appearance of blue vs. orange dots was that the protein that was helping to bind the manganese to the ZnS core was denatured or detached from the dots in cases where the dots fluoresced blue, but we're not sure why.
Stock Solutions for This Week's Quantum Dot Synthesis
All solutions are made in 250mL volumetric flasks.
First solution synthesized, labeled "NB 1", was incubated at 80C and contained: