Journal
PLASMA PROCESSES AND POLYMERS
Volume 17, Issue 12, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppap.202000113
Keywords
dielectric barrier discharge; pulsed plasma langmuir probe diagnostics; plasma lmmersion ion implantation; polymer surface modification; UV-visible spectroscopy
Funding
- Pierce Armstrong Foundation
- 1666 Foundation
- Goodridge Foundation The Commonwealth Government for the Sarcoma Research Centre at Chris O'Brien Lifehouse
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We demonstrate the ability of plasma immersion ion implantation to treat all surfaces of a porous polymer structure designed to act as a bone scaffold. We prove that the internal pore surfaces receive ion bombardment by examining the ultraviolet (UV) absorption spectrum of a thin polymer sheet placed inside pores of different diameters and locations. The current-voltage characteristics of a Langmuir probe in a pulsed dielectric barrier discharge are studied and interpreted to give measurements of the ion current drawn from plasma in the pores. An existing one-dimensional model of the plasma is adapted and combined with the Langmuir probe measurements to predict the ion dose to the pore surfaces. Our prediction agrees with measurements from UV absorption.
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