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Title: Model polymer etching and surface modification by a time modulated RF plasma jet: role of atomic oxygen and water vapor

Journal Article · · Journal of Physics. D, Applied Physics
 [1];  [1];  [1];  [2];  [2];  [1]
  1. University of Maryland, College Park, MD (United States)
  2. University of Minnesota, Minneapolis, MN (United States)

The surface interaction of a well-characterized time modulated radio frequency (RF) plasma jet with polystyrene, poly(methyl methacrylate) and poly(vinyl alcohol) as model polymers is investigated. The RF plasma jet shows fast polymer etching but mild chemical modification with a characteristic carbonate ester and NO formation on the etched surface. By varying the plasma treatment conditions including feed gas composition, environment gaseous composition, and treatment distance, we find that short lived species, especially atomic O for Ar/1% O2 and 1% air plasma and OH for Ar/1% H2O plasma, play an essential role for polymer etching. For O2 containing plasma, we find that atomic O initiates polymer etching and the etching depth mirrors the measured decay of O atoms in the gas phase as the nozzlesurface distance increases. The etching reaction probability of an O atom ranging from 10-4 to 10-3 is consistent with low pressure plasma research. We also find that adding O2 and H2O simultaneously into Ar feed gas quenches polymer etching compared to adding them separately which suggests the reduction of O and OH density in Ar/O2/H2O plasma.

Research Organization:
Univ. of Maryland, College Park, MD (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); National Science Foundation (NSF)
Grant/Contract Number:
SC0001939; PHY-1415353
OSTI ID:
1659744
Alternate ID(s):
OSTI ID: 1335531; OSTI ID: 1787988
Journal Information:
Journal of Physics. D, Applied Physics, Vol. 50, Issue 3; ISSN 0022-3727
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Cited By (5)

Stages of polymer transformation during remote plasma oxidation (RPO) at atmospheric pressure journal March 2018
Role of adsorbed water on PEEK surfaces prior to − and after − atmospheric plasma activation journal April 2018
Polymer etching by atmospheric-pressure plasma jet and surface micro-discharge sources: Activation energy analysis and etching directionality journal March 2018
Sensitivity of tumor versus normal cell migration and morphology to cold atmospheric plasma‐treated media in varying culture conditions journal November 2019
Interaction of long‐lived reactive species from cold atmospheric pressure plasma with polymers: Role of macromolecular structure and deep modification of aromatic polymers journal August 2019