@article{CTT100822496,
  author = {Wei Zhou and Zhe Chen and Nagayasu Oshima and Kenji Ito and Brian O'Rourke and Ryunosuke Kuroda and Ryoichi Suzuki and Hiroshi Yanagishita and Takuro Tsutsui and Akira Uedono and Noriyosu Hayashizaki},
  title = {In-situ characterization of free-volume holes in polymer thin films under controlled humidity conditions with an atmospheric positron probe microanalyzer},
  journal = {Applied Physics Letters},
  year = 2012,
}