著者

小笠原 正弘 平尾 孝 藤田 静雄

出版者

公益社団法人 日本材料学会

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.66, no.9, pp.634-638, 2017-09-15 (Released:2017-09-20)

参考文献数

22

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Light emitting diodes (LEDs) possess advantages to be applied as one of the key medical devices in the field of phototherapy. In this paper, effects of blue light on inducing sleep have been examined based on the experiments for 100 test subjects. Narrow-band (<11 nm in full width of half maximum in the emission spectrum) irradiation was found to be more effective for inducing sleep. It should be noted that the intensity of light employed in this study was far less that that suppressing the secretion of melatonin and obstructing the circadian rhythm, which has recently extended widely. Since a variety of light sources in terms of wavelengths, bandwidths, and intensity are required in the medical applications or light therapy, LEDs are the ideal device and the efforts of developing new LEDs with the materials research of semiconductors are strongly demanded.

著者

青木 勝詔 鈴木 恵友 高梨 久美子 石井 一久 SATYANARAYANA B. S. 尾浦 憲治郎 古田 寛 古田 守 平尾 孝

出版者

一般社団法人 日本真空学会

雑誌

真空 = JOURNAL OF THE VACUUM SOCIETY OF JAPAN (ISSN:05598516)

巻号頁・発行日

vol.49, no.7, pp.430-432, 2006-07-20

参考文献数

8

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&nbsp;&nbsp;A novel method to make the sharp emitter tips having low threshold voltage of field emission was achieved using nanodiamond particles on conductive amorphous carbon films. A conductive tetrahedral amorphous (ta) carbon film and nano-sized diamond particles with the size of 50 to 200 nm were sequentially deposited by cathordic arc method using a glass substrate at room temperature. Tip structure with the height of 10 to 40 nm was formed by H₂ plasma etching of the diamond particles/ta-C double layer film. The threshold voltage of the field emission from the tip structures formed by the H₂ plasma etching was 3 V/&mu;m that was significantly lower than 10.4 V/&mu;m for the as-deposited diamond particles/ta-C double layer carbon film. This selective dry etching method using the nano-diamond particles could fabricate sharp and high density nano-sized diamond emitters on conductive ta-C films without any photo-masks of lithography processes.<br>

著者

小笠原 正弘 平尾 孝 藤田 静雄

出版者

The Society of Materials Science, Japan

雑誌

材料 (ISSN:05145163)

巻号頁・発行日

vol.64, no.5, pp.405-409, 2015