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Type: Artigo de Periódico
Title: Irradiação de polímeros com feixe de elétrons: caracterização de íons positivos através da técnica de tempo-de-vôo
Other Titles: Irradiation of polymers using electron beams: characterization of positive ions through the time-of-flight technique
Author: Rocco, Maria Luiza Miranda
Pontes, Frederico Celestino
Faraudo, Gustavo Sebastian
Souza, Gerardo Gerson Bezerra de
Weibel, Daniel Eduardo Weibel
Pinho, Roberto Rosas
Resumo: -
Abstract: With the aim of studying the interaction of fast electrons with solid surfaces we have developed an experimental set-up based on electron stimulated desorption (ESD) coupled to time-of-flight (TOF) mass spectrometry. Poly(methyl methacrylate) and poly(vynil chloride) samples have been irradiated by a pulsed electron beam of 1.2 keV and 0.18 µs FWHM. The results show that H+ is the main ionic species to desorb after electron bombardment. In addition, other ionic fragments were also observed and assigned. These results show the potentiality of this technique in the study of ESD of polymers.
Keywords: Electron stimulated desorption
Time-of-flight spectrometer
CNPq: -
Language: por
Country: Brasil
Publisher: -
Institution Initials: -
Access Type: Acesso Aberto
Issue Date: Jan-2004
Appears in Collections:Artigos de Periódicos

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