| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Instrumentação. |
|
Data corrente: |
22/12/1999 |
|
Data da última atualização: |
23/02/2012 |
|
Autoria: |
MATTOSO, L. H. C.; OLIVEIRA JUNIOR, O. N.; FERREIRA, M. |
|
Afiliação: |
EMBRAPA-CNPDIA; USP-IFSC. |
|
Título: |
Conducting polymers (for Langmuir-Blodgett film fabrication). |
|
Ano de publicação: |
1996 |
|
Fonte/Imprenta: |
In: SALAMONE, J.C. (Ed.). Polymeric materials encyclopedia. Boca Raton: CRC, 1996. |
|
Páginas: |
p. 1432-1439. |
|
Idioma: |
Inglês |
|
Conteúdo: |
There has been considerable excitement recently over the use of conducting polymers in a variety of technological applications. Some of the applications have already been commercialized, as in the case of rechargeable batteries, conductive textiles, and electrical display. Sophisticated long-term applications are also envisaged for these materials, including the fabrication of molecular electronics devices, that is, devices in which switching and memory phenomena would be controlled at the molecular level. Two main requiremos must be met to achieve such an ambitious goal. First development of the ability to construct structures whouse molecular architecture could be manipulated and appropriately designed. Such structures are most likely to consist of ultra-thin films. Two techniques are available for this purpose, namely the Langmuir-Blodgett (LB) method, which has been investigated extensively for several yearls, and the more recent Self Assembly (SA) technique for building multilayers. These techniques allow the fabrication of ultra-thim (of the order of nm) in the form of multilayers with a high degree of control of orientational order in the case of the LB films, The second requirement concerns the acess to individual molecules. Though substantial research must be carried out before this requirement can be met, the progesss reported in the use of atomic force microscopy (AFM) and scanning tunneling microscopy (STM) on molecular system is most encouraging. It is now possible to image monolayers of simple molecules on graphite and also to probe and manipulate individual molecules at surfaces. We are concerneed with the first of the above-mentioned aspects, focusing on the LB technique that has been exploited worldwide for fabricating ultra-thim films of a variety of materials, including conducting polymers. Because the formation of LB films requires the spreading of a monolayer onto an aqueous subphase, some prerequisites must be fulfilled by the material of interest. It must be soluble in a reasonably volatile organic solvent and also sufficiently surface for spreading to occur. The conducting polymers that were first investigated, namely polyacetylene, polypyrrole, polythiophene, and polyaniline, could not be processed in this manner, and therefore several atrategies were developed for overcoming this difficulty. An overview of these strategies will be provided below, following a brief introduction to LB films. Recent developments on the LB films from polyanilines will then be discussed, followed by a description of the most important properties and some of the possible appications that have been demonstrated for LB films of conducting polymers. MenosThere has been considerable excitement recently over the use of conducting polymers in a variety of technological applications. Some of the applications have already been commercialized, as in the case of rechargeable batteries, conductive textiles, and electrical display. Sophisticated long-term applications are also envisaged for these materials, including the fabrication of molecular electronics devices, that is, devices in which switching and memory phenomena would be controlled at the molecular level. Two main requiremos must be met to achieve such an ambitious goal. First development of the ability to construct structures whouse molecular architecture could be manipulated and appropriately designed. Such structures are most likely to consist of ultra-thin films. Two techniques are available for this purpose, namely the Langmuir-Blodgett (LB) method, which has been investigated extensively for several yearls, and the more recent Self Assembly (SA) technique for building multilayers. These techniques allow the fabrication of ultra-thim (of the order of nm) in the form of multilayers with a high degree of control of orientational order in the case of the LB films, The second requirement concerns the acess to individual molecules. Though substantial research must be carried out before this requirement can be met, the progesss reported in the use of atomic force microscopy (AFM) and scanning tunneling microscopy (STM) on molecular system is most encouraging. It is now possi... Mostrar Tudo |
|
Palavras-Chave: |
Polimeros. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 03192naa a2200169 a 4500
001 1027112
005 2012-02-23
008 1996 bl --- 0-- u #d
100 1 $aMATTOSO, L. H. C.
245 $aConducting polymers (for Langmuir-Blodgett film fabrication).
260 $c1996
300 $ap. 1432-1439.
520 $aThere has been considerable excitement recently over the use of conducting polymers in a variety of technological applications. Some of the applications have already been commercialized, as in the case of rechargeable batteries, conductive textiles, and electrical display. Sophisticated long-term applications are also envisaged for these materials, including the fabrication of molecular electronics devices, that is, devices in which switching and memory phenomena would be controlled at the molecular level. Two main requiremos must be met to achieve such an ambitious goal. First development of the ability to construct structures whouse molecular architecture could be manipulated and appropriately designed. Such structures are most likely to consist of ultra-thin films. Two techniques are available for this purpose, namely the Langmuir-Blodgett (LB) method, which has been investigated extensively for several yearls, and the more recent Self Assembly (SA) technique for building multilayers. These techniques allow the fabrication of ultra-thim (of the order of nm) in the form of multilayers with a high degree of control of orientational order in the case of the LB films, The second requirement concerns the acess to individual molecules. Though substantial research must be carried out before this requirement can be met, the progesss reported in the use of atomic force microscopy (AFM) and scanning tunneling microscopy (STM) on molecular system is most encouraging. It is now possible to image monolayers of simple molecules on graphite and also to probe and manipulate individual molecules at surfaces. We are concerneed with the first of the above-mentioned aspects, focusing on the LB technique that has been exploited worldwide for fabricating ultra-thim films of a variety of materials, including conducting polymers. Because the formation of LB films requires the spreading of a monolayer onto an aqueous subphase, some prerequisites must be fulfilled by the material of interest. It must be soluble in a reasonably volatile organic solvent and also sufficiently surface for spreading to occur. The conducting polymers that were first investigated, namely polyacetylene, polypyrrole, polythiophene, and polyaniline, could not be processed in this manner, and therefore several atrategies were developed for overcoming this difficulty. An overview of these strategies will be provided below, following a brief introduction to LB films. Recent developments on the LB films from polyanilines will then be discussed, followed by a description of the most important properties and some of the possible appications that have been demonstrated for LB films of conducting polymers.
653 $aPolimeros
700 1 $aOLIVEIRA JUNIOR, O. N.
700 1 $aFERREIRA, M.
773 $tIn: SALAMONE, J.C. (Ed.). Polymeric materials encyclopedia. Boca Raton: CRC, 1996.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Instrumentação (CNPDIA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 34 | |
| 5. |  | MOTA, P. R. D.; ALVES, M. A.; ANDRADE JÚNIOR, A. S de; MELO, F. de B; MENDES, A. G. Análise da fertilidade dos solos do distrito de irrigação do açude Caldeirão, Piauí. In: WORKSHOP INTERNACIONAL DE INOVAÇÕES TECNOLÓGICAS NA IRRIGAÇÃO, 2.; SIMPÓSIO BRASILEIRO SOBRE O USO MÚLTIPLO DA ÀGUA, 1., 2008, Fortaleza. Anais...Fortaleza: CENTEC, 2008. p. 854-859| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Meio-Norte. |
|   |
| 6. | | CIDRACK, D. S.; ALVES, M. A. O.; FREIRE FILHO, F. R.; FREIRE, E. A.; CAVADA, B. S.; GRANGEIRO, T. B. Análise da variabilidade genética de genótipos de feijão-de-corda (Vigna unguiculata (L.) Walp.). In: REUNIÃO NACIONAL DE PESQUISA DE CAUPI, 5., 2001, Teresina. Avanços tecnológicos no feijão caupi: anais. Teresina: Embrapa Meio-Norte, 2001. p. 140-144 (Embrapa Meio-Norte. Documentos, 56).| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio-Norte. |
|  |
| 9. | | GLAESER, D. F.; MERCANTE, F. M.; ALVES, M. A. M.; SILVA, R. F. da; KOMORI, O. M. Biomassa microbiana do solo sob sistemas de manejo orgânico em cultivos de café. Ensaios e Ciência: Ciências Biológicas Agrárias e da Saúde, valinhos, v. 14, n. 2, p. 103-114, jul. 2011.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: C - 0 |
| Biblioteca(s): Embrapa Agropecuária Oeste. |
| |
| 10. | | MOTA, P. R. D.; ALVES, M. A.; ANDRADE JÚNIOR, A. S de; MENDES, A. G.; MELO, F. de B. Caracterização da fertilidade dos solos do distrito de irrigação tabuleiros litorâneos do Piauí. In: WORKSHOP INTERNACIONAL DE INOVAÇÕES TECNOLÓGICAS NA IRRIGAÇÃO, 2.; SIMPÓSIO BRASILEIRO SOBRE O USO MÚLTIPLO DA ÀGUA, 1., 2008, Fortaleza. Anais...Fortaleza: CENTEC, 2008. p. 860-866.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Meio-Norte. |
| |
| 11. | | CRUZ, E. K. S. da; ALVES, M. A.; GALLO, J.; OLIVEIRA JUNIOR, R. C. de; SANTOS, D. B. dos. Disponibilidade de cálcio e magnésio em solo, sob diferentes cultivos no planalto santareno. In: CONGRESSO DE CIÊNCIA E TECNOLOGIA DA AMAZÔNIA, 10.; SALÃO DE PESQUISA E INICIAÇÃO CIENTÍFICA, 17.; SALÃO DE EXTENSÃO, 4., 2017, Santarém. Caderno de resumos expandidos. Santarém: ULBRA, 2017. p. 111-114.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
|  |
| 12. | | ALVES, M. A.; GUIMARÃES, A. M.; FERNER, J. S.; FREITAS, L. A. dos S.; DISSIUTA, S. I.; DIESEL, V. Metodologias participativas e D&D de sistemas agroflorestais. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 5., 2004, Curitiba. SAFs: desenvolvimento com proteção ambiental: anais. Colombo: Embrapa Florestas, 2004. p. 593-595. (Embrapa Florestas. Documentos, 98).| Biblioteca(s): Embrapa Florestas. |
| |
| 14. | | GUIMARÃES, A. M.; FREITAS, L. A. de; FERNER, J. S.; ALVES, M. A.; DISSIUTA, S. I.; DIESEL, V. A percepção de agricultores familiares sobre modelos de sistemas agroflorestais no ebordo da serra na região central do RS. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 5., 2004, Curitiba. SAFs: desenvolvimento com proteção ambiental: anais. Colombo: Embrapa Florestas, 2004. p.151-153. (Embrapa Florestas. Documentos, 98).| Biblioteca(s): Embrapa Florestas. |
| |
| 15. | | VESCHI, J. L. A.; DUTRA, I. S.; ALVES, M. A. B.; PERRI, S. H. V.; ZAFALON, L. F.; FERNANDEZ-MIYAKAWA, M. Avaliação sorológica de vacinas comerciais polivalentes contra a enterotoxemia em caprinos. ARS Veterinaria, Jaboticabal, v. 28, n. 4, p. 222-226, 2012.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 4 |
| Biblioteca(s): Embrapa Pecuária Sudeste; Embrapa Semiárido. |
| |
| 16. | | VESCHI, J. L. A.; DUTRA, I. S.; ALVES, M. A. B.; FERNANDEZ-MIYAKAWA, M. E.; PERRI, S. H. V.; UZAL, F. A. Sorological evaluation of commercial vaccines against enterotoxemia in goats. In: INTERNATIONAL CONFERENCE ON GOATS, 9.; REUNIÓN NACIONAL SOBRE CAPRINOCULTURA, 23, 2008, Querétaro, México. Sustainable goat production: challenges an opportunities of small and large enterprises; proceedings. Querétaro: International Goat Association, 2008.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Semiárido. |
| |
| 17. | | MORATELLI, F. A.; ALVES, M. A. B.; BORELLA, D. R.; KRAESKI, A.; ALMEIDA, F. T. de; ZOLIN, C. A.; HOSHIDE, A. K.; SOUZA, A. P. de. Effects of Land Use on Soil Physical-Hydric Attributes in Two Watersheds in the Southern Amazon, Brazil. Soil Systems, v. 7, n. 4, 103, 2023.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 4 |
| Biblioteca(s): Embrapa Agrossilvipastoril. |
| |
| 18. | | CAMPECHE, D. F. B.; PEREIRA, L. A.; FIGUEIREDO, R. A. C. R.; PAULINO, R. V.; ALVES, M. A.; NOVA, L. L. M. V.; GUEDES, E. A. C. Limnological parameters and phytoplakton in fishponds with tambaqui, Colossoma macropomum (Cuvier, 1816) in the semi-arid region. Acta Limnologica Brasiliensia, Rio Claro, v. 21, n. 3, p. 333-341, 2009.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
| Biblioteca(s): Embrapa Semiárido. |
| |
| 19. | | ROCHA, C. F. D.; BERGALLO, H. G.; FIDALGO, E. C. C.; ALVES, M. A. S.; COSTA, M. B.; VAN SLUYS, M.; UZEDA, M. C.; COSTA, T. C. e C. da; SANTOS, M. A.; COZZOLINO, A. C. R. Challenges for conservation: additional issues in developing strategies and actions for conserving biodiversity. In: ANNUAL MEETING, 23.; INTERNATIONAL CONGRESS FOR CONSERVATION BIOLOGY, 2009, Beijing. Conservation: harmony for nature and society: abstract. Beijing: Society for Conservation Biology, 2009. p. 207-208. Ref. 306063.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Milho e Sorgo. |
| |
| 20. | | ROCHA, C. F. D.; BERGALLO, H. G.; FIDALGO, E. C. C.; ALVES, M. A. S.; COSTA, M. B.; VAN SLUYS, M.; UZEDA, M. C.; COSTA, T. C. e C. da; SANTOS, M. A.; COZZOLINO, A. C. R. Challenges for conservation: additional issues in developing strategies and actions for conserving biodiversity. In: ANNUAL MEETING, 23.; INTERNATIONAL CONGRESS FOR CONSERVATION BIOLOGY, 2009, Beijing. Conservation: harmony for nature and society: abstract. Beijing: Society for Conservation Biology, 2009. p. 207-208. Ref. 306063.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Solos. |
| |
| Registros recuperados : 34 | |
|
| Expressão de busca inválida. Verifique!!! |
|
|
