Optimizing layer-by-layer deposition of interpolymer complexes on solid substrates using Biacore

The layer-by-layer deposition of polymers onto surfaces allows the fabrication of multilayered materials for a wide range of applications, from drug delivery to biosensors. This work describes the analysis of complex formation between poly(acrylic acid) and methylcellulose in aqueous solutions using...

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Bibliographic Details
Published in:Soft matter 2012-07, Vol.8 (25), p.6782-6787
Main Authors: Bizley, Samuel C., Williams, Adrian C., Kemp, Fred, Khutoryanskiy, Vitaliy V.
Format: Article
Language:English
Subjects:
Coatings
Complex formation
Deposition
Mathematical analysis
Molecular weight
Optimization
Plasmons
Polymers
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Summary:The layer-by-layer deposition of polymers onto surfaces allows the fabrication of multilayered materials for a wide range of applications, from drug delivery to biosensors. This work describes the analysis of complex formation between poly(acrylic acid) and methylcellulose in aqueous solutions using Biacore, a surface plasmon resonance analytical technique, traditionally used to examine biological interactions. This technique characterized the layer-by-layer deposition of these polymers on the surface of a Biacore sensor chip. The results were subsequently used to optimize the experimental conditions for sequential layer deposition on glass slides. The role of the solution pH and poly(acrylic acid) molecular weight on the formation of interpolymer multilayered coatings was researched, and showed that the optimal deposition of the polymer complexes was achieved at pHs less than or equal to 2.5 with a poly(acrylic acid) molecular weight of 450 kDa.
ISSN:1744-683X
1744-6848
DOI:10.1039/c2sm25652e