Solvent vapor-assisted imprinting of polymer films coated on curved surfaces with flexible PVA stamps / Rabibrata Mukherjee in Industrial & engineering chemistry research, Vol. 48 N° 19 (Octobre 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 19 (Octobre 2009) . - pp. 8812–8818 Titre : Solvent vapor-assisted imprinting of polymer films coated on curved surfaces with flexible PVA stamps Type de document : texte imprimé Auteurs : Rabibrata Mukherjee, Auteur ; Ganesh K. Patil, Auteur ; Ashutosh Sharma, Auteur Année de publication : 2009 Article en page(s) : pp. 8812–8818 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Nonplanar surfaces Curved surfacesPolymer films Patterned polyvinyl alcohol stamp Résumé : We report a simple yet robust and reproducible technique to create surface patterns with submicrometer scale resolution on polymer films coated on nonplanar and curved surfaces at room temperature, without applying any external pressure. The imprinting is achieved by using a flexible, patterned polyvinyl alcohol (PVA) stamp in a controlled solvent vapor atmosphere, where the patterned foil comes in adhesive contact with a swollen and softened polymer film. The stamp bends along the contours of the curved surface to make a complete contact with a soft and swollen viscoelastic polymer film to make an imprint. The soft surface of the film then deforms on the length scale of each structure on the stamp to make a conformal contact, forming a negative replica of the stamp pattern on the film surface. The flexible PVA stamp is later dissolved in water after the patterning process is complete. It is shown that the technique is portable across a variety of polymer coatings, substrates, and geometries. Further, we also show that the same technique can be employed to create complex 2-D microstructures on nonplanar surfaces by multiple imprintings. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801740y [article] Solvent vapor-assisted imprinting of polymer films coated on curved surfaces with flexible PVA stamps [texte imprimé] / Rabibrata Mukherjee, Auteur ; Ganesh K. Patil, Auteur ; Ashutosh Sharma, Auteur . - 2009 . - pp. 8812–8818. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 19 (Octobre 2009) . - pp. 8812–8818 Mots-clés : Nonplanar surfaces Curved surfacesPolymer films Patterned polyvinyl alcohol stamp Résumé : We report a simple yet robust and reproducible technique to create surface patterns with submicrometer scale resolution on polymer films coated on nonplanar and curved surfaces at room temperature, without applying any external pressure. The imprinting is achieved by using a flexible, patterned polyvinyl alcohol (PVA) stamp in a controlled solvent vapor atmosphere, where the patterned foil comes in adhesive contact with a swollen and softened polymer film. The stamp bends along the contours of the curved surface to make a complete contact with a soft and swollen viscoelastic polymer film to make an imprint. The soft surface of the film then deforms on the length scale of each structure on the stamp to make a conformal contact, forming a negative replica of the stamp pattern on the film surface. The flexible PVA stamp is later dissolved in water after the patterning process is complete. It is shown that the technique is portable across a variety of polymer coatings, substrates, and geometries. Further, we also show that the same technique can be employed to create complex 2-D microstructures on nonplanar surfaces by multiple imprintings. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801740y

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