Richard Goodwin wrote:
> BTW the strength of the light showing up with a laser has much much
less to do with the particle concentration than the particle size. 1/4
the particles of twice the size will show up as 4 times as bright.
What is the best way to make the smallest particles?
You can either make them that way directly or reduce them later. To
make them the smallest possible requires the following:
1. current limiting to no more than 1mA per square inch of anode surface
2. water temperature no warmer than 120 F
3. constant agitation or stirring of the water
4. polarity reversal of the current every 60 seconds
5. concentration of no higher than about 20 ppm
6. very pure distilled water to start with
If larger particle CS is made, usually determined by a strong Tyndall,
or for even larger particles a yellow, gold, orange color, then it can
be allowed to age for 2 days, then a small amount of H2O2 added will
reduce the particles to mostly 2 atoms each. I use 1/2 teaspoon H2O2
teaspoon per gallon which works our to be a few drops per 8 ounce glass.
Marshall
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