User:Madeleine Y. Bee/Notebook/Single Molecule Fluorescence/2013/06/03

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June 3, 2013

Absorbance and Fluorescence Data

Finish preparing thiol DNA, AuNP and ThT sample

2[ThT]:1[DNA]→ 2.2245μM ThT<br.> 10% of 250μL=25μL (within 10% allows for accurate concentration comparison)<br.> Total solution volume: 275μL<br.> (2.2245×10-6M)(275×10-6L)=6.11738×10-10moles ThT<br.> (6.11738×10-10moles)/(25×10-6L)=24.5μM ThT<br.> <br.> To make 24.5μM ThT:<br.> (120μM)V=(24.5μM)(25μL)<br.> V=5.1μL in 19.9μL PBS buffer<br.> <br.> Add 25μL of 24.5μM ThT to 250μL DNA/AuNP solution<br.> New concentrations:

  • thiol DNA- 1.011μM
  • AuNP- 13.486μM
  • ThT- 2.2245μM

<br.>

Absorbance and Fluorescence Data

<br.> <br.> <br.> <br.> <br.> <br.>

Notes

Samples containing Molecular Beacon excited at 532nm<br.> Samples containing ThT excited at 440nm<br.>

Sample Preparation for FCS and Calculations

Thiol DNA, MB, AuNP Solution Dilutions
  • Starting Concentrations:
    • AuNP- 9.03nM
    • MB-1268nM
    • Thiol DNA- 677.157nM

1. 1nM AuNPs<br.> (9.03nM)V=(1nM)(30μL)<br.> V=3.32μL in 26.68μL PBS buffer

  • New Concentrations:
    • AuNP- 1nM
    • MB- 140.33nM
    • Thiol DNA- 74.94nM

2. 500pM AuNPs<br.> 15μL 1nM solution in 15μL PBS buffer

  • New Concentrations:
    • AuNP- 500pM
    • MB- 70.165nM
    • Thiol DNA- 37.47nM

3. 100pM AuNPs<br.> 6μL 500pM solution in 24μL PBS buffer

  • New Concentrations:
    • AuNP- 100pM
    • MB- 14.033nM
    • Thiol DNA- 7.55nM
Thiol DNA, MB Solution Dilutions
  • Starting Concentrations:
    • MB- 1268nM
    • Thiol DNA- 727.5nM

4. 140.33nM MB<br.> 3.32μL in 26.68μL PBS buffer

  • New Concentrations:
    • MB- 140.33nM
    • 80.51nM

5. 70.165nM MB<br.> 15μL 140.33nM MB in 15μL PBS buffer

  • New Concentrations:
    • MB- 70.165nM
    • Thiol DNA- 40.26nM

6. 14.033nM MB<br.> 6μL 70.165nM MB in 24μL PBS buffer

  • New Concentrations:
    • MB- 14.033nM
    • Thiol DNA- 40.26nM
MB Solution Dilutions
  • Starting Concentrations:
    • MB- 1268nM

7. 140.33nM MB<br.> 3.32μL in 26.68μL PBS buffer<br.> <br.> 8. 70.165nM MB<br.> 15μL 140.33nM MB in 15μL PBS buffer<br.> <br.> 9. 14.033nM MB<br.> 6μL 70.165nM MB in 24μL PBS buffer<br.>



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