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Polyelectrolyte multilayer stamping in aqueous phase and non-contact mode / Sumit Mehrotra in Industrial & engineering chemistry research, Vol. 50 N° 15 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp 8851–8858 Titre : Polyelectrolyte multilayer stamping in aqueous phase and non-contact mode Type de document : texte imprimé Auteurs : Sumit Mehrotra, Auteur ; Ilsoon Lee, Auteur ; Chun Liu, Auteur Année de publication : 2011 Article en page(s) : pp 8851–8858 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Polyelectrolyte  Aqueous  phase Résumé : Polyelectrolyte multilayer (PEM) transfer printing has been previously achieved by stamping under dry conditions. Here, we show for the first time that PEM can be transferred from a stamp to the base substrate under aqueous conditions whereby the two surfaces are in a noncontact mode. Degradable multilayers of (PAA/PEG)10.5 followed by nondegradable multilayers of (PDAC/SPS)80.5 were fabricated under acidic pH conditions on either PDMS or glass (stamp), and subsequently transferred over top of another multilayer prepared on a different substrate (base substrate), with a spacing of 200 μm between the stamping surface and the base substrate. This multilayer transfer was performed under physiological pH conditions. This process is referred to herein as noncontact, aqueous-phase multilayer (NAM) transfer. NAM transfer can be useful for applications such as fabricating three-dimensional (3-D) cellular scaffolds. We attempted to create a 3-D cellular scaffold using NAM transfer, and characterized the scaffolds with conventional and fluorescence microscopy. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102011m [article] Polyelectrolyte multilayer stamping in aqueous phase and non-contact mode [texte imprimé] / Sumit Mehrotra, Auteur ; Ilsoon Lee, Auteur ; Chun Liu, Auteur . - 2011 . - pp 8851–8858. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp 8851–8858 Mots-clés : Polyelectrolyte  Aqueous  phase Résumé : Polyelectrolyte multilayer (PEM) transfer printing has been previously achieved by stamping under dry conditions. Here, we show for the first time that PEM can be transferred from a stamp to the base substrate under aqueous conditions whereby the two surfaces are in a noncontact mode. Degradable multilayers of (PAA/PEG)10.5 followed by nondegradable multilayers of (PDAC/SPS)80.5 were fabricated under acidic pH conditions on either PDMS or glass (stamp), and subsequently transferred over top of another multilayer prepared on a different substrate (base substrate), with a spacing of 200 μm between the stamping surface and the base substrate. This multilayer transfer was performed under physiological pH conditions. This process is referred to herein as noncontact, aqueous-phase multilayer (NAM) transfer. NAM transfer can be useful for applications such as fabricating three-dimensional (3-D) cellular scaffolds. We attempted to create a 3-D cellular scaffold using NAM transfer, and characterized the scaffolds with conventional and fluorescence microscopy. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102011m