Effects of O 2 and N 2 /H 2 plasma treatments on the neuronal cell growth on single-walled carbon nanotube paper scaffolds

  • Ok Ja Yoon
  • , Hyun Jung Lee
  • , Yeong Mi Jang
  • , Hyun Woo Kim
  • , Won Bok Lee
  • , Sung Su Kim
  • , Nae Eung Lee

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The O 2 and N 2 /H 2 plasma treatments of single-walled carbon nanotube (SWCNT) papers as scaffolds for enhanced neuronal cell growth were conducted to functionalize their surfaces with different functional groups and to roughen their surfaces. To evaluate the effects of the surface roughness and functionalization modifications of the SWCNT papers, we investigated the neuronal morphology, mitochondrial membrane potential, and acetylcholine/acetylcholinesterase levels of human neuroblastoma during SH-SY5Y cell growth on the treated SWCNT papers. Our results demonstrated that the plasma-chemical functionalization caused changes in the surface charge states with functional groups with negative and positive charges and then the increased surface roughness enhanced neuronal cell adhesion, mitochondrial membrane potential, and the level of neurotransmitter in vitro. The cell adhesion and mitochondrial membrane potential on the negatively charged SWCNT papers were improved more than on the positively charged SWCNT papers. Also, measurements of the neurotransmitter level showed an enhanced acetylcholine level on the negatively charged SWCNT papers compared to the positively charged SWCNT papers.

Original languageEnglish
Pages (from-to)8535-8541
Number of pages7
JournalApplied Surface Science
Volume257
Issue number20
DOIs
StatePublished - 1 Aug 2011

Keywords

  • Mitochondrial membrane potential
  • Neuronal activity
  • Neurotransmitter
  • Scaffolds
  • Single-walled carbon nanotube

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