TEM images of dried gold solutions

ByKarl Smith

For the modeling paper, I had to precisely quantify the distribution of gold nanoparticles in the BBI solutions. To do this, I dried the stock solutions of particles on TEM grids (I don’t know what chips I used, but I seem to recall – and take this with a grain of salt – that the grids I used were from wafer 1070 and had variable amounts of alumina on their surface. I believe I pipetted about 1 uL of fluid on each TEM grid. For particles larger than 50 nm, I had to pipette 1 uL, dry, pipette another uL, and dry, since the concentration was so much lower. The chart I derived looked like this: 

I thought this might have application to some of Kilean’s experiments, so below are JPEGs of these images. I have the raw tiffs if anyone would like them.

5 nm gold:

10 nm gold:

15 nm gold:

20 nm gold:

30 nm gold:

40 nm gold:

50 nm gold:

60 nm gold:

80 nm gold:

100 nm gold:

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