Surface characterization of thin film induced by He + ion-beam irradiation into PLLA

Ion beams were irradiated into biodegradable polymer sheets to develop thin film, self-assembled cellular sheets that exfoliated spontaneously from the substrates in a water solution. We previously reported that thin film and self-assembled cellular sheet were obtained by irradiating He + ion beams...

Full description

Saved in:
Bibliographic Details
Published in:Surface & coatings technology 2005-06, Vol.196 (1), p.383-388
Main Authors: Yotoriyama, Tasuku, Suzuki, Yoshiaki, Mise, Takaya, Tsukamoto, Takeyo, Iwaki, Masaya
Format: Article
Language:English
Subjects:
Biodegradable polymer
Cell sheet
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Ion implantation
Materials science
Other topics in materials science
Physics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Ion beams were irradiated into biodegradable polymer sheets to develop thin film, self-assembled cellular sheets that exfoliated spontaneously from the substrates in a water solution. We previously reported that thin film and self-assembled cellular sheet were obtained by irradiating He + ion beams into biodegradable polymer sheets. However, the mechanisms of exfoliation from the substrates have not been clarified. Poly- l-lactic acid (PLLA) sheets were used as substrates. He + ion-beams were irradiated at an energy of 150 keV with a fluence of 1×10 15 ions/cm 2. We investigated surface characteristics of He + ion-beam-irradiated PLLA by means of SAICAS, SIMS, FT-IR-ATR and Raman scattering measurements. Ion-beam-irradiated exfoliated thin films had two layers, a harder layer than the original and a softer one. He + ion-beam-irradiated exfoliated thin film included a disordered graphite structure produced by ion-beam irradiation. We concluded that thin film and self-assembled cellular sheets could be obtained by He + ion-beam irradiation into PLLA using localized energy deposition.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2004.08.157