Nanotechnology :: Gold particles part 3
An experiment in nanotechnology to observe how nano particles change. Observing Part A and part B of the Gold particles experiment. Part A: Synthesising gold nanoparticles Method: Pour 50mL of gold hydrogen tetrachloride (HAuCl4 .3H2O) solution in a 150mL flask. Place a magnetic stirrer in the flask and place a watch glass on top of the flask (to ensure that no evaporation occurs – the concentration of the solution must remain constant) Place the flask with the gold solution on the hot plate, adjust the dials to allow the solution to heat (not vigorously) Heat until boiling, turn heat off, and leave the stirrer on. Part B: Testing for the presense of Gold Nanoparticles. Method: Shine a laser beam through each of the solutions. The presence of a colloidal suspension can be detected by the reflection of a laser beam from the particles. Record your observations in the table provided.
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