Irradiação de polímeros com feixe de elétrons: caracterização de íons positivos através da técnica de tempo-de-vôo Irradiation of polymers using electron beams: characterization of positive ions through the time-of-flight technique
<abstract language="eng">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 c...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2004-02-01
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| Series: | Química Nova |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000100027 |
| _version_ | 1828464639353028608 |
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| author | Maria Luiza Miranda Rocco Frederico Celestino Pontes Gustavo Sebastian Faraudo Gerardo Gerson Bezerra de Souza Daniel Eduardo Weibel Roberto Rosas Pinho |
| author_facet | Maria Luiza Miranda Rocco Frederico Celestino Pontes Gustavo Sebastian Faraudo Gerardo Gerson Bezerra de Souza Daniel Eduardo Weibel Roberto Rosas Pinho |
| author_sort | Maria Luiza Miranda Rocco |
| collection | DOAJ |
| description | <abstract language="eng">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. |
| first_indexed | 2024-12-11T03:17:55Z |
| format | Article |
| id | doaj.art-20db0211763e44a58d17361b62bd05ce |
| institution | Directory Open Access Journal |
| issn | 0100-4042 1678-7064 |
| language | English |
| last_indexed | 2024-12-11T03:17:55Z |
| publishDate | 2004-02-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-20db0211763e44a58d17361b62bd05ce2022-12-22T01:22:42ZengSociedade Brasileira de QuímicaQuímica Nova0100-40421678-70642004-02-0127116016310.1590/S0100-40422004000100027Irradiação de polímeros com feixe de elétrons: caracterização de íons positivos através da técnica de tempo-de-vôo Irradiation of polymers using electron beams: characterization of positive ions through the time-of-flight techniqueMaria Luiza Miranda RoccoFrederico Celestino PontesGustavo Sebastian FaraudoGerardo Gerson Bezerra de SouzaDaniel Eduardo WeibelRoberto Rosas Pinho<abstract language="eng">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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000100027electron stimulated desorptiontime-of-flight spectrometerpolymers |
| spellingShingle | Maria Luiza Miranda Rocco Frederico Celestino Pontes Gustavo Sebastian Faraudo Gerardo Gerson Bezerra de Souza Daniel Eduardo Weibel Roberto Rosas Pinho Irradiação de polímeros com feixe de elétrons: caracterização de íons positivos através da técnica de tempo-de-vôo Irradiation of polymers using electron beams: characterization of positive ions through the time-of-flight technique Química Nova electron stimulated desorption time-of-flight spectrometer polymers |
| title | Irradiação de polímeros com feixe de elétrons: caracterização de íons positivos através da técnica de tempo-de-vôo Irradiation of polymers using electron beams: characterization of positive ions through the time-of-flight technique |
| title_full | Irradiação de polímeros com feixe de elétrons: caracterização de íons positivos através da técnica de tempo-de-vôo Irradiation of polymers using electron beams: characterization of positive ions through the time-of-flight technique |
| title_fullStr | Irradiação de polímeros com feixe de elétrons: caracterização de íons positivos através da técnica de tempo-de-vôo Irradiation of polymers using electron beams: characterization of positive ions through the time-of-flight technique |
| title_full_unstemmed | Irradiação de polímeros com feixe de elétrons: caracterização de íons positivos através da técnica de tempo-de-vôo Irradiation of polymers using electron beams: characterization of positive ions through the time-of-flight technique |
| title_short | Irradiação de polímeros com feixe de elétrons: caracterização de íons positivos através da técnica de tempo-de-vôo Irradiation of polymers using electron beams: characterization of positive ions through the time-of-flight technique |
| title_sort | irradiacao de polimeros com feixe de eletrons caracterizacao de ions positivos atraves da tecnica de tempo de voo irradiation of polymers using electron beams characterization of positive ions through the time of flight technique |
| topic | electron stimulated desorption time-of-flight spectrometer polymers |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000100027 |
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