Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/62930
Type: Artigo de periódico
Title: Charge Partitioning at Gas-Solid Interfaces: Humidity Causes Electricity Buildup on Metals
Author: Ducati, TRD
Simoes, LH
Galembeck, F
Abstract: Isolated metals within Faraday cages spontaneously acquire charge at relative humidity above 50%: aluminum and chrome-plated brass become negative, stainless steel is rendered positive, and copper remains almost neutral. Isolated metal charging within shielded and grounded containers confirms that the atmosphere is an electric charge reservoir where OH(-) and H(+) ions transfer to gas-solid interfaces, producing net current. The electricity buildup dependence on humidity, or hygroelectricity, acts simultaneously but in opposition to the well-known charge dissipation due to the increase in surface conductance of solids under high humidity. Acknowledging this dual role of humidity improves the reproducibility of electrostatic experiments.
Country: EUA
Editor: Amer Chemical Soc
Rights: fechado
Identifier DOI: 10.1021/la102494k
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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