@misc{oai:repo.qst.go.jp:00080650,
 author = {Suzuki, Satoru and Matsuda, Hiroyuki and Ishikawa, Takahiro and Konishi, Teruaki and Hamano, Tsuyoshi and Ajiki, Hiroshi and Ohno, Yutaka and Hirao, Toshio and Ishikawa, Takahiro and Konishi, Teruaki and Hamano, Tsuyoshi},
 month = {Sep},
 note = {Radiation exposure to the eye lens has been a problem for a curer in the radiation therapy. Them, the transparent real-time dosimeter is required to measure the eye dose without disturbing their eyesight. In order to develop the transparrent detector, transparency is necessary not only for the substrate but also for the electrode. Carbon nanotube is known to have transparency along with radiation tolerance. In this study, we have fabricated the coplanar CNT thin-film electrodes on the PEN sheet and conducted the direct electrical detection of X-ray using these.
Figure 1 shows the scchematic structure of teh device, where the distance between the CNT thin-film electrodes was 1mm. The electrodes were patterned on the PEN substrate by splay coating of the single-walled CNT dispersion in IPA (0.2 wt%) using the metal mask. The device was placed inside of the stainless chamber under a vacuum of 1.0 x 10-2 Pa. X-ray waith an effective energy of 83 keV was irradiated to the device from outside of the chamber at a bias voltage of 10V. The current of the device was measured in real time during turning on and off of the irradiation at each dose rate.
The current was confirmed to respond to the X-ray irradiation, as shown in Fig.2.  Moreover, the generated current increased lineaerly with the dose rate beloww 10.18 mGy/sec, as shown in FIg. 3. although it no longer changed linearly above 20.54 mGy/sec., 第59回 フラーレン・ナノチューブ・グラフェン総合シンポジウム},
 title = {Electrical detection of X-ray by using coplanar CNT thin-film electrodes on PEN substrate},
 year = {2020}
}