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https://scholarbank.nus.edu.sg/handle/10635/67602
DC Field | Value | |
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dc.title | XPS characterization of surface functionalized electroactive polymers | |
dc.contributor.author | Loh, F.C. | |
dc.contributor.author | Tan, K.L. | |
dc.contributor.author | Kang, E.T. | |
dc.contributor.author | Kato, K. | |
dc.contributor.author | Uyama, Y. | |
dc.contributor.author | Ikada, Y. | |
dc.date.accessioned | 2014-06-17T10:03:03Z | |
dc.date.available | 2014-06-17T10:03:03Z | |
dc.date.issued | 1996-09-16 | |
dc.identifier.citation | Loh, F.C.,Tan, K.L.,Kang, E.T.,Kato, K.,Uyama, Y.,Ikada, Y. (1996-09-16). XPS characterization of surface functionalized electroactive polymers. Surface and Interface Analysis 24 (9) : 597-604. ScholarBank@NUS Repository. | |
dc.identifier.issn | 01422421 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/67602 | |
dc.description.abstract | Surface modification and functionalization of polyaniline (PAN) and polypyrrole (PPY) films were achieved by Ar plasma treatment, near-UV-induced graft copolymerization with acrylic acid (AAc) and covalent immobilization of an enzyme (trypsin). The compositions and structures of the modified and functionalized polymer surfaces were characterized by angle-resolved XPS. Argon plasma treatment results in minor oxidations of the carbon atoms but is accompanied by a significant decrease in the intrinsic oxidation state ([=N-]/[-NH-] ratio) of the polymers. Graft copolymerization with AAc readily gives rise to self-protonated PAN and PPY surface structures. The surface concentration of the grafted AAc polymer increases with increasing monomer concentration and near-UV irradiation time during grafting but decreases with increasing plasma pretreatment time. Covalent immobilization of trypsin on the AAc-polymer-grafted PAN and PPY films is facilitated by the use of water-soluble carbodiimide intermediate (WSC). The effective enzyme activity increases initially with increasing surface concentration of the grafted AAc polymer, but becomes saturated at moderate to high AAc polymer concentration. | |
dc.source | Scopus | |
dc.type | Article | |
dc.contributor.department | CHEMICAL ENGINEERING | |
dc.contributor.department | PHYSICS | |
dc.description.sourcetitle | Surface and Interface Analysis | |
dc.description.volume | 24 | |
dc.description.issue | 9 | |
dc.description.page | 597-604 | |
dc.description.coden | SIAND | |
dc.identifier.isiut | NOT_IN_WOS | |
Appears in Collections: | Staff Publications |
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