In situ monitoring of the effect of ionic strength and pH on plasma polymer thin films

Ingo Koper; Hannah Askew; Karyn Jarvis; Robert Jones; Joseph Shapter; Sally McArthur; Jacqueline Knobloch

doi:10.1002/ppap.201700084

In situ monitoring of the effect of ionic strength and pH on plasma polymer thin films

Ingo Koper, Hannah Askew, Karyn Jarvis, Robert Jones, Joseph Shapter, Sally McArthur, Jacqueline Knobloch

Research output: Contribution to journal › Article

5 Citations (Scopus)

Abstract

The effect of ionic strength and pH on the structure of hydrated plasma polymerized films of allylamine (ppAAm) and acrylic acid (ppAAc) has been analyzed in situ using quartz crystal microbalance with dissipation techniques, electrochemical impedance spectroscopy, ellipsomtery, and X-ray photoelectron spectroscopy. Both materials showed a salt concentration and pH dependent uptake and release of water and ions. Depending on the type of monomer used, the effects showed reversible or non-reversible behavior. The investigation of the electrochemical properties of the film further revealed a non-homogeneous structure, especially in the case of ppAAc films, with regions of higher and lower cross-linking density. The use of complimentary techniques to characterize the films in situ allowed for a deeper understanding of processes happening inside the plasma polymerized films, which can help to optimize film preparation conditions for selected applications.

Original language	English
Article number	1700084
Number of pages	11
Journal	Plasma Processes and Polymers
Volume	14
Issue number	11
DOIs	https://doi.org/10.1002/ppap.201700084
Publication status	E-pub ahead of print - 2017

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Koper, I., Askew, H., Jarvis, K., Jones, R., Shapter, J., McArthur, S., & Knobloch, J. (2017). In situ monitoring of the effect of ionic strength and pH on plasma polymer thin films. Plasma Processes and Polymers, 14(11), [1700084]. https://doi.org/10.1002/ppap.201700084

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abstract = "The effect of ionic strength and pH on the structure of hydrated plasma polymerized films of allylamine (ppAAm) and acrylic acid (ppAAc) has been analyzed in situ using quartz crystal microbalance with dissipation techniques, electrochemical impedance spectroscopy, ellipsomtery, and X-ray photoelectron spectroscopy. Both materials showed a salt concentration and pH dependent uptake and release of water and ions. Depending on the type of monomer used, the effects showed reversible or non-reversible behavior. The investigation of the electrochemical properties of the film further revealed a non-homogeneous structure, especially in the case of ppAAc films, with regions of higher and lower cross-linking density. The use of complimentary techniques to characterize the films in situ allowed for a deeper understanding of processes happening inside the plasma polymerized films, which can help to optimize film preparation conditions for selected applications.",

author = "Ingo Koper and Hannah Askew and Karyn Jarvis and Robert Jones and Joseph Shapter and Sally McArthur and Jacqueline Knobloch",

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AU - Koper, Ingo

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AU - Shapter, Joseph

AU - McArthur, Sally

AU - Knobloch, Jacqueline

PY - 2017

Y1 - 2017

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