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A look at the CZ Ferro video seems to confirm I picked up the right ferrofluid bottle (Ferrosound Ferrofluidics (603) 883-9800).  The Exploratorium used it for an exhibit (I think it was featured in the APE book).  If memory serves the people at the ferrofluid company were really nice (but they probably won't tell you what liquid the ferrofluid can be suspended in - it's isopropyl and water go too far off the right percent (around 50) and the ferrofluid falls out of solution).  Also I made the mistake of siliconing borosilicate glass together - it didn't work  - apparently the silicone messed with the chemistry - so look at the ape book, or get an old pickle jar (yes), or buy borosilicate glass containers that are pre-made, or use CZ Ferro.

-William





On Nov 4, 2011, at 11:01 AM, Catherine McCarthy wrote:

> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related institutions.
> *****************************************************************************
> 
> Hi Brian, 
> A source you may want to check out for non-staining ferrofluid suspension is CZ Ferro (Concept Zero).  They make a suspension liquid they call "Gen4 suspension liquid" - you can contact them for ordering at: http://www.czferro.com/CALL_ME_NOW.html
> The precise formula they use is proprietary.
> 
> The NISE Network has an interactive ferrofluid exhibit in the Nano mini-exhibition using the CZ Ferro suspension.
> Since you are in Baltimore, you can see the exhibit in action at the Port Discovery Children's Museum.  You can see more info about the Nano mini-exhibition here: http://www.nisenet.org/catalog/exhibits/nano_mini-exhibition
> 
> For our small ferrofluid cells we have included in NanoDays kits, we use Educational Innovations #FF-200: http://www.nisenet.org/catalog/programs/exploring-ferrofluid
> 
> Good luck with the project
> Catherine
> ---
> Catherine McCarthy, Ph.D.
> Project Leader - NISE Network
> Science Museum of Minnesota
>   mailto:[log in to unmask]
>   651-262-3850
> 
> NISE Network: http://www.nisenet.org
> SMM: http://www.smm.org
> 
> 
> 
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William Katzman
Program Leader
LIGO Science Education Center
"Inspiring Science"
[log in to unmask]
(225) 686-3134

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