User:Melvin Colorado Escobar/Notebook/chem 472/2016/01/27

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  1. Plan the syntheses for the semester.
  2. Make a list of all of the chemicals that will be used.
  3. Synthesize citrate gold nanoparticles.


  • Stock Prep
  1. 5mL of 1% weight HAuCl4 was made in water
    1. 0.0503g
  2. 5mL of 38.8mM Sodium Citrate was made in water
    1. 0.100g
  • Synthesis of AuNPs
  1. 90mL of water placed in a 100 mL volumetric flask with magnetic stirring
  2. 1mL of HAuCl4 solution added and heated until it reached 90 degrees Celsius.
  3. 2mL of Sodium Citrate solution added and stirred to which the solution went from clear, black, to a deep red/purple


  • For 38.8M Sodium Citrate:

0.0388M = n/0.01L n=0.00388 .000388*258.06g/mol = 0.100g

  • For 5% of Gold:

m=0.0500g for 5mL of water


Samples were conserved in a falcon tube, accounting for light, and left for testing for next week.