User:Rebeca Rodriguez/Notebook/Chem 471/2016/02/03

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  1. Synthesis of controlled AuNPs
  2. UV-Vis of Red AuNPs/calibration curve with serial dilutions


  1. The same protocol was followed from Jan. 29th
  2. Sodium Citrate used: 0.0044715g
  3. Gold used: 0.05031g
  4. Stirring at 240 rpm
  5. Heated at 155 degrees C, changed to 170 degrees C after one hour
  6. 1hr and 20 min in order to reach 90 degrees C, to which the sodium citrate was then added.
  7. It was kept on the heat stirring for 5 minutes and 30 seconds. The solution turned a bright red color.


Figure 1: AuNP UV-Vis Spectra for our Red AuNPs (synthesized on 02/02/2016)
Red AuNP Spectra 2-9.png

Figure 2: Calibration Curve for our Red AuNPs (synthesized on 02/02/2016)
Red AuNP Calibration Curve 2-9.png


It was then decided that we would test whether the purple or red citrate gold nanoparticles would be absorbed most into the plant, thus finding our control group of AuNPs.