User:Puja Mody/Notebook/Chem 571: Gold Nanoparticles/2012/09/12: Difference between revisions
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==Conclusions== | ==Conclusions== | ||
*pH 10 AuNP fibers + Tris buffer UV-Vis data showed that: | *pH 10 AuNP fibers + Tris buffer UV-Vis data showed that: | ||
A. The results were fairly consistent with there not being an increase in the concentration of the gold nano particles. For all 7 samples, the peak stayed at generally the same wavelength for all three tests and therefore the entire length of experimentation time. However, it is important to note the drop in absorbency | A. The results were fairly consistent with there not being an increase in the concentration of the gold nano particles. For all 7 samples, the peak stayed at generally the same wavelength for all three tests and therefore the entire length of experimentation time. However, it is important to note the drop in absorbency for some of the concentration samples. For example, the 1x10-4 concentration shows the most obvious drop between The first time the were measured after the addition of tris (immediately) and two hours later when the third run of UV-Vis was taken. Whether or not this is simply a result of noise or actually because an increase in the amount of AuNP dissolved in the buffer solution is unknown because a blank of water was not measured during these tests. | ||
[[Image:1x10^-3 compared to 1x10^-4.png| 1x10^-3 compared to 1x10^-4]] | |||
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Revision as of 22:42, 2 October 2012
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Day 5Goals
Procedure
Calculations/ Data
Tris Buffer
make 100mL of solutions so..... 12.11grams of tris /100mL were mixed. For further breakdown by run and concentration see attached spreadsheet Link to spreadsheet for Tris buffer pH 10 UV-Vis. Conclusions
A. The results were fairly consistent with there not being an increase in the concentration of the gold nano particles. For all 7 samples, the peak stayed at generally the same wavelength for all three tests and therefore the entire length of experimentation time. However, it is important to note the drop in absorbency for some of the concentration samples. For example, the 1x10-4 concentration shows the most obvious drop between The first time the were measured after the addition of tris (immediately) and two hours later when the third run of UV-Vis was taken. Whether or not this is simply a result of noise or actually because an increase in the amount of AuNP dissolved in the buffer solution is unknown because a blank of water was not measured during these tests.
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