User:Zachary I. Mendel/Notebook/Zacks Notebook/2014/01/28

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January 28th Procedure Make citrate nanoparticles 1) 1.158mL of 10mM HAuCl4 added to 50mL of water Making HAuCl4 Added 0.0413g HAuCl3 to 10mL volumetric flask Made Sodium citrate solution added 0.250g sodium citrate into 25mL volumetric flask 2) Heat solution until it boils 3) 0.5mL of 10mg/mL citrate sodium added to solution and heated until color changes from dark blue to red Determine the size of the nanoparticle solution notes so far we have heated the solution and it has not turned blue possible that not enough gold was added need to check how much we added when we made it earlier We then made a new solution where we added 2mLs of 10.48mM gold solution The solution with 2mL of gold did undergo color change We then prepared another solution with the correct amount of citrate 863uL of citrate was added to the solution In the first batch we added 500uL Now I am going to do UV Vis on the samples Specifically 1/10 dilutions there was a much higher peak in the correct dillution than the first "random" solution where we did not have the correct amount of citrate