OU NanoLab/NSF NUE/Bumm & Johnson
Prepare gold and silver nanoparticles
What do you observe with your eye?
(simple visual inspection, color, turbidity, etc.).
Do you see a scattering path from the light?
What color is it?
Is the color of the scattered light changed by the sol before it gets to you?
Is the extinction dominated by absorption or scattering?
How can you tell?
Model using MiePlot to determine particle size
Make initial guess and then refine your guess.
How sensitive is the spectrum to particle size?
What is the wavelength of the electrons we used?