User:Madeleine Y. Bee/Notebook/Single Molecule Fluorescence/2013/07/25: Difference between revisions
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***Combine MHA and AuNP solutions | ***Combine MHA and AuNP solutions | ||
**Stir overnight | **Stir overnight | ||
**Note: heat to 130C if MHA does not dissolve (when first added and before silica-coating reaction; do not heat overnight) | **Note: heat to 130C for approximately five minutes if MHA does not dissolve (when first added and before silica-coating reaction; do not heat overnight) | ||
*Day Two: | *Day Two: | ||
**Prepare the following solutions: | **Prepare the following solutions: |
Revision as of 10:42, 25 July 2013
Procedure Update, MHA Day One | <html><img src="/images/9/94/Report.png" border="0" /></html> Main project page <html><img src="/images/c/c3/Resultset_previous.png" border="0" /></html>Previous entry<html> </html>Next entry<html><img src="/images/5/5c/Resultset_next.png" border="0" /></html> |
July 25, 2013Procedure Update: MHA Silica-CoatingAccording to Aggregation and adhesion of gold nanoparticles in phosphate buffer saline, PBS and prolonged sonication actually cause aggregation in gold nanoparticle solutions: "results showed an optimized sonication time of 10 min to reach equilibrium for plain gold nanoparticles in water." Instead of using PBS to dilute all components, filtered MilliQ water will be used to dilute nanoparticles as well as MHA, as the organic solvent in solution prior to the actual silica-coating may have also been affecting observed the gold nanoparticle aggregation. Filtered MilliQ water will be brought up to room temperature as we've noticed cold solutions (whether water or PBS) have seemed to induce aggregation as well.
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