Visualization of focused proton beam dose distribution by atomic force microscopy using blended polymer films based on polyacrylic acid

Masaaki Omichi, Katsuyoshi Takano, Takahiro Satoh, Tomihiro Kamiya, Yasuyuki Ishii, Takeru Ohkubo, Masashi Koka, Wataru Kada, Masaki Sugimoto, Hiroyuki Nishikawa, Shu Seki

Research output: Contribution to journalArticle

2 Citations (Scopus)


A simple and sensitive sub-micrometer scale method for visualization of the dose distribution of a focused proton beam (FPB) was developed, taking advantage of the formation of a bulky crosslinked structure induced by FPB irradiation of a common polymer and cross-linker, polyacrylic acid-N,N'-methylene bisacrylamide, blend film surface. The irradiated part of the film swelled as a peak, and the height of swelling increased with increasing FPB fluence. The film was used as a proton beam-sensitive polymer film by analysis of the irradiated film surface using atomic force microscopy. The method was successfully applied to confirm the FPB pattern. Typical misaligned spot shape of FPB gave clear 3-dimensional structures, and the half-solenoidal nanostructures are visualized clearly by use of crescent shaped beam.

Original languageEnglish
Pages (from-to)7401-7404
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Issue number9
Publication statusPublished - 2012 Sep 1



  • And N-N'-Methylene Bisacrylamide
  • Atomic force microscopy
  • Dose distribution
  • Focused proton beam
  • Polyacrylic acid

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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