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...

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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
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cited_by cdi_FETCH-LOGICAL-c373t-545bdc2ebd27b333a8da8096fb1afd32cf3994166a9b6ef9ef5ba4598ea33b043
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container_end_page 388
container_issue 1
container_start_page 383
container_title Surface & coatings technology
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creator Yotoriyama, Tasuku
Suzuki, Yoshiaki
Mise, Takaya
Tsukamoto, Takeyo
Iwaki, Masaya
description 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.
doi_str_mv 10.1016/j.surfcoat.2004.08.157
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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
title Surface characterization of thin film induced by He + ion-beam irradiation into PLLA
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