@article{oai:nitech.repo.nii.ac.jp:00005285,
 author = {Tan, T. T. and Sim, H. S. and Lau, S. P. and Yang, H. Y. and Tanemura, Masaki and Tanaka, J.},
 issue = {10},
 journal = {APPLIED PHYSICS LETTERS},
 month = {Mar},
 note = {Carbon nanofibers were grown on flexible polyimide substrates using an ion-beam sputtering technique. Field emission measurement showed a fairly low threshold voltage of 1.5 V/μm with a current density of 1 μA/cm2. The field enhancement factor was determined to be 4400. The emitter showed resilience when exploited as a high voltage electron source for x-ray generation. The x-ray generated by the flexible emitter is capable of delivering fine images of biological samples with superior sharpness, resolution, and contrast., application/pdf},
 pages = {103105-1--103105-3},
 title = {X-ray generation using carbon-nanofiber-based flexible field emitters},
 volume = {88},
 year = {2006}
}