To be a radical or not to be one? The fate of the stable nitroxide radical TEMPO [(2,2,6,6-Tetramethylpiperidin-1-yl)oxyl] undergoing plasma polymerization into thin-film coatings.

Abstract:

:The stable nitroxide radical TEMPO [(2,2,6,6-Tetramethylpiperidin-1-yl)oxyl] has a multitude of applications in fields ranging from energy storage to biomedical applications and many more. However, to date, the processes of incorporating nitroxide radicals into thin-film coatings are laborious and not cost-effective, which hinders their wider use in many applications. In contrast, the authors have recently demonstrated the facile method of plasma polymerization of TEMPO into thin-film coatings that retain the stable nitroxide radicals. In this work, we are using three types of mass spectroscopic methods (plasma-mass spectrometry, time of flight secondary ion mass spectrometry, and high-performance liquid chromatography-mass spectrometry) and electron spin resonance to track the fate of the TEMPO molecule from monomer flask through the plasma and inside the resulting coatings. The results of this study demonstrate that TEMPO is a versatile monomer that can be used across different plasma reactors and reliably retain the stable nitroxide radical in the resulting thin-film coatings if certain process conditions are observed, namely, higher process pressures and lower powers.

journal_name

Biointerphases

journal_title

Biointerphases

authors

Michl TD,Tran DTT,Böttle K,Kuckling HF,Zhalgasbaikyzy A,Ivanovská B,Cavallaro AA,Araque Toledo MA,Sherman PJ,Al-Bataineh SA,Vasilev K

doi

10.1116/6.0000259

subject

Has Abstract

pub_date

2020-06-26 00:00:00

pages

031015

issue

3

eissn

1934-8630

issn

1559-4106

journal_volume

15

pub_type

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