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Yamada, Ryohei; Odagiri, Taiki*; Iwaoka, Kazuki*; Hosoda, Masahiro*; Tokonami, Shinji*
Radiation Environment and Medicine, 8(1), p.21 - 25, 2019/02
We evaluate radon/thoron and its progeny concentration using passive-type monitors using CR-39 plates. After exposure, it is necessary to do chemical etching for CR-39 plates. In the present study, we considered shortening of chemical etching time for CR-39 and enlargement of the track diameter (i.e. etch pit diameter) aiming for introduction of automatic counting system in the future. Optimum conditions were determined by changing solution concentration, solution temperature and etching time. As a result, the optimized conditions (concentration, temperature and etching time) were determined to be 8 M NaOH solution, 75 degrees Celsius and 10 hours. This result of etching time showed that the chemical etching was completed in less than half of conventional etching time. Furthermore, it was suggested that shorter etching time would be possible if we do not consider the enlargement of conventional track diameter.
Teraoka, Yuden
Nano Tekunoroji Daijiten, p.340 - 351, 2003/12
The current status of microprocesses using synchrotron radiation in Japan was reviewed. The SR-excited process is followed by SR-excited surface modification, SR-excited crystal growth and SR-excited etching. The SR-excited surface modification is followed by SR-gas-excited surface modification and SR-direct-excited surface modification. The SR-excited crystal growth is followed by SR-excited atomic layer epitaxy and SR-excited chemical vapor deposition. THe SR-excited etching is followed by SR-direct-excited etching, SR-gas-excited etching and SR ablation.
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J.Electron Microsc., 30(4), p.292 - 297, 1981/00
no abstracts in English
Nucl.Tracks, 13(1-2), p.33 - 44, 1979/00
no abstracts in English
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Science, 199(4327), p.421 - 422, 1978/00
Times Cited Count：14no abstracts in English
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Journal of Applied Physics, 47(4), p.1355 - 1358, 1976/04
Times Cited Count：13no abstracts in English
; ; Izui, Kazuhiko;
Journal of Applied Physics, 46(3), p.1155 - 1158, 1975/03
Times Cited Count：6no abstracts in English
Journal of the Physical Society of Japan, 26(1), p.143 - 148, 1969/01
Times Cited Count：5no abstracts in English
Journal of the Physical Society of Japan, 26(1), p.143 - 148, 1969/00
no abstracts in English
Koshikawa, Hiroshi; Yamamoto, Shunya; Sugimoto, Masaki; Kitamura, Akane; Sawada, Shinichi; Yamaki, Tetsuya
no journal, ,
Chemical etching of polymer films irradiated with heavy ions leads to the formation of ion-track membranes with nanoscale pores in different shapes. Particularly, conically-shaped pores are expected to have a potential to create metallic nanoneedles by combination of vapor-deposition and electroplating methods. In this study, we prepared copper nanoneedles inside the conical pores of polyimide (PI)-based ion-track membranes and investigated their morphology. The PI films were irradiated with 
Ar ions. The irradiated films were etched in a sodium hypochlorite solution at 60
C for 0.5 h, leading to the formation of conical pores with a surface diameter of ca. 500 nm. A very thin Au layer was deposited on this pore side of the ion-track membranes; then, it was used as a cathode for electroplating copper into the pores. After dissolving the PI templates, we obtained the copper needles ca. 500 nm in base diameter and 1.2 
m in height on copper plates.
