Supramolecular ionics: electric charge partition within polymers and other non-conducting solids
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| Format: | Artículo científico |
| Sprache: | en |
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Academia Brasileira de Ciências
2001
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| _version_ | 1876456853818310656 |
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| author | Fernando Galembeck |
| author_facet | Fernando Galembeck |
| contents | Supramolecular ionics: electric charge partition within polymers and other non-conducting solids Fernando Galembeck Carlos A. R. Costa André Galembeck Maria do Carmo V. M. Silva Multidisciplinaria (Ciencias Naturales y Exactas) electric charge excess electrostatics of solids electric force microscopy polymer electrostatic behavior scanning electric potential microscopy Electrostatic phenomena in insulators have been known for the past four centuries, but many related questionsare still unanswered, for instance: which are the charge-bearing species in an electrified organic polymer,how are the charges spatially distributed and which is the contribution of the electrically charged domainsto the overall polymer properties? New scanning probe microscopies were recently introduced, and theseare suitable for the mapping of electric potentials across a solid sample thus providing some answers for theprevious questions. In this work, we report results obtained with two of these techniques: scanning electricpotential (SEPM) and electric force microscopy (EFM). These results were associated to images acquiredby using analytical electron microscopy (energy-loss spectroscopy imaging in the transmission electronmicroscope, ESI-TEM) for colloid polymer samples. Together, they show domains with excess electriccharges (and potentials) extending up to hundreds of nanometers and formed by large clusters of cations oranions, reaching supramolecular dimensions. Domains with excess electric charge were also observed inthermoplastics as well as in silica, polyphosphate and titanium oxide particles. In the case of thermoplastics,the origin of the charges is tentatively assigned to their tribochemistry, oxidation followed by segregation orthe Mawell-Wagner-Sillars and Costa Ribeiro effects. 2001 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32773403 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.73 |
| format | Artículo científico |
| id | redalyc_32773403 |
| institution | Redalyc |
| language | en |
| publishDate | 2001 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Supramolecular ionics: electric charge partition within polymers and other non-conducting solids Fernando Galembeck Multidisciplinaria (Ciencias Naturales y Exactas) electric charge excess electrostatics of solids electric force microscopy polymer electrostatic behavior scanning electric potential microscopy Supramolecular ionics: electric charge partition within polymers and other non-conducting solids Fernando Galembeck Carlos A. R. Costa André Galembeck Maria do Carmo V. M. Silva Multidisciplinaria (Ciencias Naturales y Exactas) electric charge excess electrostatics of solids electric force microscopy polymer electrostatic behavior scanning electric potential microscopy Electrostatic phenomena in insulators have been known for the past four centuries, but many related questionsare still unanswered, for instance: which are the charge-bearing species in an electrified organic polymer,how are the charges spatially distributed and which is the contribution of the electrically charged domainsto the overall polymer properties? New scanning probe microscopies were recently introduced, and theseare suitable for the mapping of electric potentials across a solid sample thus providing some answers for theprevious questions. In this work, we report results obtained with two of these techniques: scanning electricpotential (SEPM) and electric force microscopy (EFM). These results were associated to images acquiredby using analytical electron microscopy (energy-loss spectroscopy imaging in the transmission electronmicroscope, ESI-TEM) for colloid polymer samples. Together, they show domains with excess electriccharges (and potentials) extending up to hundreds of nanometers and formed by large clusters of cations oranions, reaching supramolecular dimensions. Domains with excess electric charge were also observed inthermoplastics as well as in silica, polyphosphate and titanium oxide particles. In the case of thermoplastics,the origin of the charges is tentatively assigned to their tribochemistry, oxidation followed by segregation orthe Mawell-Wagner-Sillars and Costa Ribeiro effects. 2001 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32773403 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.73 |
| title | Supramolecular ionics: electric charge partition within polymers and other non-conducting solids |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) electric charge excess electrostatics of solids electric force microscopy polymer electrostatic behavior scanning electric potential microscopy |
| url | https://www.redalyc.org/articulo.oa?id=32773403 |