Here is a very nice website: good for your magnetized water and for the fertilizer apparatus (see above picture )
OSnano
Open Source Nanotechnology
At this stage, it consists of only one project: instructions for creating magnetite nanocrystals; but we hope this project will inspire others in the future. What can you do with magnetite nanocrystals?

Why? Magnetite Nanocrystals are good for removing arsenic from water

Step 1: Prepare and Collect Ingredients
(a) Ingredients for a typical nanocrystal synthesis include: Oil, vinegar, pan, crystal drain openerTM and rust.
Step 2: Make your own soap.
(b-c) Synthesis begins with soapmaking. For this the oil is mixed with crystal drain openerTM and water.
(d) After curing for a day the soap solidifies.
Step 3: Produce a Fatty Acid Mixture
(e) For efficient dissolution in subsequent steps, the soap is ground to a fine powder,
(f) then mixed with vinegar
(g-h) while heating on a stove.
(i-j) Once all the soap is dissolved the solution forms two layers: a yellow top layer and a cloudy white/yellow bottom layer.
(k) The top layer is the fatty acid mixture (FAM). This needs to be heated at 110 oC to remove excess water and vinegar by-products.
(l) Clear yellow FAM is collected.
Step 4: Collect and Grind some Rust
(m-n) Rust was scraped off of rusted metals and was ground to a fine powder.
Step 5:Cook/grow your own magnetite crystals
(o) FAM and rust were mixed.
(p-q) Mixture was heated for 2 hours at below and near boiling temperatures. The temperature was measured using a standard mercury thermometer.
(r-s) Magnetite (black) began to form.
Step 6: Verify your Magnetite Crystals
(t) TEM micrograph was obtained after magnetic separation in chloroform. Scale bar is 50 nm.
step 6 (i don't think we care that much about it )




















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