Check out these amazing video clips of ferrofluid, a solution containing nanoscale particles that respond to a magnetic field.
VIDEO [1]
VIDEO [2]
VIDEO [3]
LINK/IMAGES [find/scroll to ferrofluid]
IMAGES
IMAGE
LINK [Wikipedia article]
You can buy this from a number of places online, but Dan from Dan’s Data (above) recommends Educational Innovations, “who sell all sorts of things that science teachers need. Or don’t need, but want anyway, because if you’re going to have to deal with annoying teenagers all day for not enough money, you might as well play with some cool toys by way of compensation.” Makes me want to be a teacher all over again.
BUY [100ml = $30]
Update: Sachiko Kodama does interesting things with ferrofluid, and has lots of video on her website:
The Conversation {2 comments}
Dear Sir / Madam ,
Here are my ferrofluids’ requirements :
Carrier Liquid = water
% of magnetites = @ 20 — 30 %
Viscosity = @ less than 20 Cps.
Saturation Magnetisation = any ( say @ 100 guass & more )
Coercivity = highest possible ( say @ 300 Oerstads or more )
Particle size of magnetite = NANO PREFERRED
Please list ALL YOUR FERRO FLUIDS WITH DIFFERENT PRICE RANGES .
QUANTITY REQUIRED = SAY 10 LITERS PER MONTH .
SAMPLES ARE MOST WELCOME FOR MY TESTS.
These ferrofluids will be used in making SOLID INKS OF SPECIAL PROPERTIES.
Please feel free to ask any question you have.
Please send available literatures ASAP.
Best regards,
JN.
J.N.THAKER: dude, what? this is a blog.
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