If you want to research static electricity charges on different materials, you'll need an Electrometer.
Electrometer. http://en.wikipedia....ki/Electrometer
Kolbe's Electrometer/Electroscope. http://www.orau.org/...pes/MaxKohl.htm
Electronic Electrometers
electrometer schematics. http://www.next.gr/c...ics-l35901.html
http://www.circuitla...schematics.html
Simple Electrometer. http://www.vk2zay.net/article/9
An Experimenter's Electrometer. http://amasci.com/el...p1.html#Electro
Or, you can purchase one. http://www.pasco.com...c-electrometer/
Oh, i didn't knew about this. Thanks so much for the info!