Nos Abonnements
Ressources Électroniques
|
Exemplaires
| Code-barres | Cote | Support | Localisation | Section | Disponibilité |
|---|---|---|---|---|---|
| aucun exemplaire | |||||
Dépouillements
Ajouter le résultat dans votre panier
Titre : Polymer semiconductor crystals Type de document : texte imprimé Auteurs : Jung Ah Lim, Auteur ; Feng Liu, Auteur ; Sunzida Ferdous, Auteur Année de publication : 2010 Article en page(s) : pp. 14–24 Note générale : Ingénierie Langues : Anglais (eng) Mots-clés : Polymer crystals semiconductors Nanocrystalline fibers Index. décimale : 620 Essais des matériaux. Matériaux commerciaux. Station génératrice d'énergie. Economie de l'énergie Résumé : One of the long-standing challenges in the field of polymer semiconductors is to figure out how long interpenetrating and entangled polymer chains self-assemble into single crystals from the solution phase or melt. The ability to produce these crystalline solids has fascinated scientists from a broad range of backgrounds including physicists, chemists, and engineers. Scientists are still on the hunt for determining the mechanism of crystallization in these information-rich materials. Understanding the theory and concept of crystallization of polymer semiconductors will undoubtedly transform this area from an art to an area that will host a bandwagon of scientists and engineers. In this article we describe the basic concept of crystallization and highlight some of the advances in polymer crystallization from crystals to nanocrystalline fibers.
DEWEY : 620 ISSN : 1369-7021 En ligne : http://www.sciencedirect.com/science/article/pii/S1369702110700808
in Materials today > Vol. 13 N° 5 (Mai 2010) . - pp. 14–24[article] Polymer semiconductor crystals [texte imprimé] / Jung Ah Lim, Auteur ; Feng Liu, Auteur ; Sunzida Ferdous, Auteur . - 2010 . - pp. 14–24.
Ingénierie
Langues : Anglais (eng)
in Materials today > Vol. 13 N° 5 (Mai 2010) . - pp. 14–24
Mots-clés : Polymer crystals semiconductors Nanocrystalline fibers Index. décimale : 620 Essais des matériaux. Matériaux commerciaux. Station génératrice d'énergie. Economie de l'énergie Résumé : One of the long-standing challenges in the field of polymer semiconductors is to figure out how long interpenetrating and entangled polymer chains self-assemble into single crystals from the solution phase or melt. The ability to produce these crystalline solids has fascinated scientists from a broad range of backgrounds including physicists, chemists, and engineers. Scientists are still on the hunt for determining the mechanism of crystallization in these information-rich materials. Understanding the theory and concept of crystallization of polymer semiconductors will undoubtedly transform this area from an art to an area that will host a bandwagon of scientists and engineers. In this article we describe the basic concept of crystallization and highlight some of the advances in polymer crystallization from crystals to nanocrystalline fibers.
DEWEY : 620 ISSN : 1369-7021 En ligne : http://www.sciencedirect.com/science/article/pii/S1369702110700808 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Designing polymer surfaces via vapor deposition / Ayse Asatekin in Materials today, Vol. 13 N° 5 (Mai 2010)
Titre : Designing polymer surfaces via vapor deposition Type de document : texte imprimé Auteurs : Ayse Asatekin, Auteur ; Miles C. Barr, Auteur ; Salmaan H. Baxamusa, Auteur Année de publication : 2010 Article en page(s) : pp. 26–33 Note générale : Ingénierie Langues : Anglais (eng) Mots-clés : Polymer surfaces Vapor deposition Index. décimale : 620 Essais des matériaux. Matériaux commerciaux. Station génératrice d'énergie. Economie de l'énergie Résumé : Chemical Vapor Deposition (CVD) methods significantly augment the capabilities of traditional surface modification techniques for designing polymeric surfaces. In CVD polymerization, the monomer(s) are delivered to the surface through the vapor phase and then undergo simultaneous polymerization and thin film formation. By eliminating the need to dissolve macromolecules, CVD enables insoluble polymers to be coated and prevents solvent damage to the substrate. Since de-wetting and surface tension effects are absent, CVD coatings conform to the geometry of the underlying substrate. Hence, CVD polymers can be readily applied to virtually any substrate: organic, inorganic, rigid, flexible, planar, three-dimensional, dense, or porous. CVD methods integrate readily with other vacuum processes used to fabricate patterned surfaces and devices. CVD film growth proceeds from the substrate up, allowing for interfacial engineering, real-time monitoring, thickness control, and the synthesis of films with graded composition. This article focuses on two CVD polymerization methods that closely translate solution chemistry to vapor deposition; initiated CVD and oxidative CVD. The basic concepts underlying these methods and the resultant advantages over other thin film coating techniques are described, along with selected applications where CVD polymers are an enabling technology.
DEWEY : 620 ISSN : 1369-7021 En ligne : http://www.sciencedirect.com/science/article/pii/S136970211070081X
in Materials today > Vol. 13 N° 5 (Mai 2010) . - pp. 26–33[article] Designing polymer surfaces via vapor deposition [texte imprimé] / Ayse Asatekin, Auteur ; Miles C. Barr, Auteur ; Salmaan H. Baxamusa, Auteur . - 2010 . - pp. 26–33.
Ingénierie
Langues : Anglais (eng)
in Materials today > Vol. 13 N° 5 (Mai 2010) . - pp. 26–33
Mots-clés : Polymer surfaces Vapor deposition Index. décimale : 620 Essais des matériaux. Matériaux commerciaux. Station génératrice d'énergie. Economie de l'énergie Résumé : Chemical Vapor Deposition (CVD) methods significantly augment the capabilities of traditional surface modification techniques for designing polymeric surfaces. In CVD polymerization, the monomer(s) are delivered to the surface through the vapor phase and then undergo simultaneous polymerization and thin film formation. By eliminating the need to dissolve macromolecules, CVD enables insoluble polymers to be coated and prevents solvent damage to the substrate. Since de-wetting and surface tension effects are absent, CVD coatings conform to the geometry of the underlying substrate. Hence, CVD polymers can be readily applied to virtually any substrate: organic, inorganic, rigid, flexible, planar, three-dimensional, dense, or porous. CVD methods integrate readily with other vacuum processes used to fabricate patterned surfaces and devices. CVD film growth proceeds from the substrate up, allowing for interfacial engineering, real-time monitoring, thickness control, and the synthesis of films with graded composition. This article focuses on two CVD polymerization methods that closely translate solution chemistry to vapor deposition; initiated CVD and oxidative CVD. The basic concepts underlying these methods and the resultant advantages over other thin film coating techniques are described, along with selected applications where CVD polymers are an enabling technology.
DEWEY : 620 ISSN : 1369-7021 En ligne : http://www.sciencedirect.com/science/article/pii/S136970211070081X Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
Titre : Ion-containing polymers : new energy & clean water Type de document : texte imprimé Auteurs : Michael A. Hickner, Auteur Année de publication : 2010 Article en page(s) : pp. 34–41 Note générale : Ingénierie Langues : Anglais (eng) Mots-clés : Polymer Ion Water Energy Index. décimale : 620 Essais des matériaux. Matériaux commerciaux. Station génératrice d'énergie. Economie de l'énergie Résumé : New generations of materials are being sought as solid-state electrolytes that facilitate fast ion conduction in mechanically robust, yet thin, polymer membranes. Breakthroughs in device performance will usher in new applications and wide-spread adoption of novel power source technology as ion-conducting polymers are engineered to lower the ionic resistance in fuel cells and batteries, facilitate ion transfer and increase reaction rates at the electrolyte-electrode interface, and increase a device's tolerance to environmental excursions of temperature and relative humidity. This article describes the current state-of-the-art in our understanding of water-facilitated ion transport in polymeric membranes and provides some directions for future endeavors in the field, such as anion exchange membranes. Additionally, ties between ion-conducting polymer electrolytes and water treatment membranes are made to illustrate that the underlying mechanisms that control ion transport in fuel cell membranes may also be harnessed to catalyze the development of new membrane materials for water purification.
DEWEY : 620 ISSN : 1369-7021 En ligne : http://www.sciencedirect.com/science/article/pii/S1369702110700821
in Materials today > Vol. 13 N° 5 (Mai 2010) . - pp. 34–41[article] Ion-containing polymers : new energy & clean water [texte imprimé] / Michael A. Hickner, Auteur . - 2010 . - pp. 34–41.
Ingénierie
Langues : Anglais (eng)
in Materials today > Vol. 13 N° 5 (Mai 2010) . - pp. 34–41
Mots-clés : Polymer Ion Water Energy Index. décimale : 620 Essais des matériaux. Matériaux commerciaux. Station génératrice d'énergie. Economie de l'énergie Résumé : New generations of materials are being sought as solid-state electrolytes that facilitate fast ion conduction in mechanically robust, yet thin, polymer membranes. Breakthroughs in device performance will usher in new applications and wide-spread adoption of novel power source technology as ion-conducting polymers are engineered to lower the ionic resistance in fuel cells and batteries, facilitate ion transfer and increase reaction rates at the electrolyte-electrode interface, and increase a device's tolerance to environmental excursions of temperature and relative humidity. This article describes the current state-of-the-art in our understanding of water-facilitated ion transport in polymeric membranes and provides some directions for future endeavors in the field, such as anion exchange membranes. Additionally, ties between ion-conducting polymer electrolytes and water treatment membranes are made to illustrate that the underlying mechanisms that control ion transport in fuel cell membranes may also be harnessed to catalyze the development of new membrane materials for water purification.
DEWEY : 620 ISSN : 1369-7021 En ligne : http://www.sciencedirect.com/science/article/pii/S1369702110700821 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
Titre : Optoelectronics using block copolymers Type de document : texte imprimé Auteurs : Ioan Botiz, Auteur ; Seth B. Darling, Auteur Année de publication : 2010 Article en page(s) : pp. 42–51 Note générale : Ingénierie Langues : Anglais (eng) Mots-clés : Block copolymers Optoelectronics Photovoltaic energy Materials Self-assembly Index. décimale : 620 Essais des matériaux. Matériaux commerciaux. Station génératrice d'énergie. Economie de l'énergie Résumé : Block copolymers, either as semiconductors themselves or as structure directors, are emerging as a promising class of materials for understanding and controlling processes associated with both photovoltaic energy conversion and light emitting devices. The increasing interest in block copolymers originates not only from their potential technological advantages but also from their ability to naturally self-assemble into periodic ordered nanostructures. In this article, we emphasize methods by which block copolymer self-assembly can be utilized to rationally design and control the shape and dimension of resulting nanostructures and therefore to develop idealized morphologies. Incorporating these self-organized materials into optoelectronic device fabrication processes or directly into devices will lead to new insights into structure-property relationships and perhaps, ultimately, increases in device efficiency.
DEWEY : 620 ISSN : 1369-7021 En ligne : http://www.sciencedirect.com/science/article/pii/S1369702110700833
in Materials today > Vol. 13 N° 5 (Mai 2010) . - pp. 42–51[article] Optoelectronics using block copolymers [texte imprimé] / Ioan Botiz, Auteur ; Seth B. Darling, Auteur . - 2010 . - pp. 42–51.
Ingénierie
Langues : Anglais (eng)
in Materials today > Vol. 13 N° 5 (Mai 2010) . - pp. 42–51
Mots-clés : Block copolymers Optoelectronics Photovoltaic energy Materials Self-assembly Index. décimale : 620 Essais des matériaux. Matériaux commerciaux. Station génératrice d'énergie. Economie de l'énergie Résumé : Block copolymers, either as semiconductors themselves or as structure directors, are emerging as a promising class of materials for understanding and controlling processes associated with both photovoltaic energy conversion and light emitting devices. The increasing interest in block copolymers originates not only from their potential technological advantages but also from their ability to naturally self-assemble into periodic ordered nanostructures. In this article, we emphasize methods by which block copolymer self-assembly can be utilized to rationally design and control the shape and dimension of resulting nanostructures and therefore to develop idealized morphologies. Incorporating these self-organized materials into optoelectronic device fabrication processes or directly into devices will lead to new insights into structure-property relationships and perhaps, ultimately, increases in device efficiency.
DEWEY : 620 ISSN : 1369-7021 En ligne : http://www.sciencedirect.com/science/article/pii/S1369702110700833 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
Titre : Narrowing the nano discourse? Type de document : texte imprimé Auteurs : Peter Ladwig, Auteur ; Ashley A. Anderson, Auteur ; Dominique Brossard, Auteur Année de publication : 2010 Article en page(s) : pp. 52–54 Note générale : Ingénierie Langues : Anglais (eng) Mots-clés : Nanotechnology Online use information Audiences Index. décimale : 620 Essais des matériaux. Matériaux commerciaux. Station génératrice d'énergie. Economie de l'énergie Résumé : Audiences for science and technology news in traditional news outlets are shrinking, and recent data suggest that citizens increasingly turn to online sources for information about emerging technologies, such as nanotechnology1. This raises a number of questions. How does the lay public approach this wealth of online information about nanotechnology? And what kinds of content are they likely to encounter based on these searches? Our results suggest that the terms audiences search for and the content they encounter during these searches increasingly shift the public debate about nanotechnology away from more economic or scientific considerations toward health and medical considerations.
DEWEY : 620 ISSN : 1369-7021 En ligne : http://www.sciencedirect.com/science/article/pii/S1369702110700845
in Materials today > Vol. 13 N° 5 (Mai 2010) . - pp. 52–54[article] Narrowing the nano discourse? [texte imprimé] / Peter Ladwig, Auteur ; Ashley A. Anderson, Auteur ; Dominique Brossard, Auteur . - 2010 . - pp. 52–54.
Ingénierie
Langues : Anglais (eng)
in Materials today > Vol. 13 N° 5 (Mai 2010) . - pp. 52–54
Mots-clés : Nanotechnology Online use information Audiences Index. décimale : 620 Essais des matériaux. Matériaux commerciaux. Station génératrice d'énergie. Economie de l'énergie Résumé : Audiences for science and technology news in traditional news outlets are shrinking, and recent data suggest that citizens increasingly turn to online sources for information about emerging technologies, such as nanotechnology1. This raises a number of questions. How does the lay public approach this wealth of online information about nanotechnology? And what kinds of content are they likely to encounter based on these searches? Our results suggest that the terms audiences search for and the content they encounter during these searches increasingly shift the public debate about nanotechnology away from more economic or scientific considerations toward health and medical considerations.
DEWEY : 620 ISSN : 1369-7021 En ligne : http://www.sciencedirect.com/science/article/pii/S1369702110700845 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
