The Faraday Cage: What Is It? How Does It Work?

2015-05-22 17:47  下载量:4

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It is a well-known secret (there’s an oxymoron for you!) among electrochemists that a Faraday cage is used to reduce noise. While this “secret” is fairly widely known in electrochemistry circles, you would be hard-pressed to find good information regarding the use and function of Faraday cages in electrochemistry textbooks. In fact, a cursory inspection of the many books on our bookshelves here at Gamry produced one result in Electrochemistry for Chemists: “[Voltammetry at microelectrodes] usually requires that measurements be done in a Faraday cage (a shield against electronic noise).”[1] So kudos to Sawyer, Sobkowaik, and Roberts for the only mention we could find on a quick search. They also got the usage correct: noise-reduction, particularly important in low-current experiments (such as microelectrode voltammetry). Of course, there is no mention of set-up, grounding, or other experimental techniques that benefit from the use of such a nifty device, like EIS or corrosion measurements on highly resistant materials. Or really, even what a Faraday cage actually is.

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