Plasma treatment in air at atmospheric pressure that enables reagent-free covalent immobilization of biomolecules on polytetrafluoroethylene (PTFE)

0524475 - FGÚ 2021 RIV NL eng J - Journal Article
Bilek, M. M. M. - Vandrovcová, Marta - Shelemin, A. - Kuzminova, A. - Kylián, O. - Biederman, H. - Bačáková, Lucie - Weiss, A. S.
Plasma treatment in air at atmospheric pressure that enables reagent-free covalent immobilization of biomolecules on polytetrafluoroethylene (PTFE).
Applied Surface Science. Roč. 518, Jul 15 (2020), č. článku 146128. ISSN 0169-4332. E-ISSN 1873-5584
R&D Projects: GA ČR(CZ) GBP108/12/G108
Institutional support: RVO:67985823
Keywords : dielectric barrier discharge (DBD) * atmospheric pressure plasma * polytetrafluoroethylene (PTFE) * biomolecule functionalisation * protein immobilization * bovine serum albumin (BSA) * tropoelastin
OECD category: Technologies involving the manipulation of cells, tissues, organs or the whole organism (assisted reproduction)
Impact factor: 6.707, year: 2020
Method of publishing: Limited access
https://doi.org/10.1016/j.apsusc.2020.146128

Covalent immobilization of biomolecules to surfaces is desirable in applications in biomedicine and biotechnology, such as biosensors, protein microarrays and implantable biomedical devices. Surface-embedded radicals in polymers, produced by plasma immersion ion implantation, are known to covalently immobilize biomolecules directly from buffer without additional reagents. Here we explore the prospects for creating a surface activated for direct covalent immobilization using a dielectric barrier discharge in air at atmospheric pressure, eliminating the need for vacuum and gas feed systems. We find that a surface activation process at atmospheric pressure in air can activate polytetrafluoroethylene (PTFE) in order to achieve reagent-free covalent immobilization of biomolecules. The presence of surface immobilized protein was verified by X-ray photoelectron spectroscopy (XPS), and its covalent immobilization was demonstrated by resilience to rigorous SDS washing at elevated temperature. Time course immobilization studies show that the covalent coupling capability of the activated surfaces is retained for several days. Proof-of-concept cell assays with immobilized tropoelastin demonstrate the technique’s ability to present functional cell binding molecules for the production of truly bioactive surfaces.
Permanent Link: http://hdl.handle.net/11104/0308830