研究者詳細 - 秦　誠一

論文 - 秦　誠一

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Ti-Ni-Cu高成形性形状記憶合金を用いた，反力可変受動形触覚ディスプレイ用触知ピンの作製及び駆動評価

南原圭汰, 伊木啓一郎, 岡智絵美, 秦誠一, 櫻井淳平

機械材料・材料加工技術講演会講演論文集 2020.28 巻 ( 0 ) 頁： 266 2020年

Ti-Ni-Cu高成形性形状記憶合金を用いた，反力可変受動形触覚ディスプレイ用触知ピンの作製

南原圭汰, 伊木啓一郎, 岡智絵美, 秦誠一, 櫻井淳平

年次大会 2020 巻 ( 0 ) 頁： J22210 2020年

逆リフトオフ法を用いたMEMSミラーデバイスの作製

高瀬駿, 山田恭平, 中川優希, 山崎貴大, 岡智絵美, 櫻井淳平, 秦誠一

機械材料・材料加工技術講演会講演論文集 2020.28 巻 ( 0 ) 頁： 158 2020年

Enhanced conversion efficiency in dye-sensitized solar cells using optical textured glass substrates

Nishiyasu Y., Yang N., Oka C., Hata S., Sakurai J.

MHS 2019 - 30th 2019 International Symposium on Micro-NanoMechatronics and Human Science 2019年12月

出版者・発行元：MHS 2019 - 30th 2019 International Symposium on Micro-NanoMechatronics and Human Science

In this paper, we fabricated optical textured glass substrates by a polydimethylsiloxane (PDMS) nanoimprint lithography (NIL) on the front glass to enhance conversion efficiency of dye-sensitized solar cells (DSSCs). Two types of nano-texture (N-Tx) and micro-nano-double texture (D-Tx) were prepared. Finally, we fabricated DSSCs with textured glass. The used dye was red N719. The cell size was 6 mm square. As the results, the conversion efficiency of DSSCs with textured glasses increased by 26% for N-Tx and 19% for D-Tx compared to DSSC with flat glass.

DOI： 10.1109/MHS48134.2019.9249295

Scopus

Photoelastic stress measurement in real-time for surgery simulator using gel materials

Yamada D., Hori S., Oka C., Sakurai J., Hata S.

MHS 2019 - 30th 2019 International Symposium on Micro-NanoMechatronics and Human Science 2019年12月

出版者・発行元：MHS 2019 - 30th 2019 International Symposium on Micro-NanoMechatronics and Human Science

In recent years, minimally invasive treatment aimed at reducing the physical and mental burden of patients as well as treating diseases has attracted attention. Catheter surgery is one of the minimally invasive treatments. This surgical technique can reduce invasion compared to incision and replacement with artificial vessels. Furthermore, it is known to be superior in terms of safety. On the other hand, in catheter surgery, visual information is limited to only a two-dimensional image by an X-ray camera. Therefore, there is a problem that stress is applied to the blood vessel wall and it is damaged, so doctors are required the skill of catheter surgery. This study is proposed a catheter surgery simulator that visualizes the stress applied to the blood vessel wall in realtime using photoelasticity. The blood vessel model used for the surgery simulator focused on PVA hydrogel. Previous experiments by our group have shown that PVA hydrogel can be applied to a surgical simulator. This study has developed an image processing program to measure stress in real-time. It has verified that the application to a surgery simulator is possible by this image processing program.

DOI： 10.1109/MHS48134.2019.9249277

Scopus

Novel dynamic force sensing system using magnetostrictive energy harvester

Yamazaki T., Furuya Y., Nakao W., Hata S.

MHS 2019 - 30th 2019 International Symposium on Micro-NanoMechatronics and Human Science 2019年12月

出版者・発行元：MHS 2019 - 30th 2019 International Symposium on Micro-NanoMechatronics and Human Science

Dynamic force sensors play a key role in emerging smart technologies that can measure various types of human motions. Magnetostrictive force sensors are the most promising, lightweight, and reliable sensing technologies; however, an in-depth understanding of the sensing mechanism is still lacking. In this study, we focus on magnetic Barkhausen noise (MBN), which is generated by the inverse magnetostriction effect upon impact loading. Further, the stress-induced MBN characteristics of Fe-Co alloy/epoxy composites were investigated using a cyclic compression test. By measuring and analyzing MBN signals in magnetostrictive/epoxy resin composites, it was revealed that the root mean square value of MBN increased linearly with the increase in the stress rate. Additionally, we observed that the MBN outbreaks were affected by the magnetostriction constant. The proposed MBN force sensor system is expected to achieve high sensitivity, wide measurement range, and downsizing.

DOI： 10.1109/MHS48134.2019.9249081

Scopus

Microvalves Utilizing Heat Generation of Magnetic Nanoparticles

Miwa D., Sakurai J., Hata S., Oka C.

MHS 2019 - 30th 2019 International Symposium on Micro-NanoMechatronics and Human Science 2019年12月

出版者・発行元：MHS 2019 - 30th 2019 International Symposium on Micro-NanoMechatronics and Human Science

Most microvalves need electrical wiring on each one, and the need prevents further integration and miniaturization of microfluidic systems. Hence, we propose novel microvalves remotely controlled without the wiring on each valve. The proposed microvalves are driven by heat from magnetic nanoparticles in an alternating magnetic field. The nano-scale magnetic particles, which possess superparamagnetic behavior, generate heat in the alternating magnetic field. There is a theoretical formula for the heat generation. However, few reports are available on comparing experimental values of the heat generation with theoretical values. In this study, the experimental heating power was compared with the theoretical values, and the possibility of the proposed microvalves was verified.

DOI： 10.1109/MHS48134.2019.9249321

Scopus

Fabrication of textured substrates for dye-sensitized solar cells using polydimethylsiloxane nanoimprint lithography

Yang, N; Oka, C; Hata, S; Sakurai, J

ADVANCED OPTICAL TECHNOLOGIES 8 巻 ( 6 ) 頁： 491 - 497 2019年12月

記述言語：英語出版者・発行元：Advanced Optical Technologies

© 2019 THOSS Media & De Gruyter, Berlin/Boston. We proposed a fabrication of nanoimprinted textures on a front glass/transparent conductive oxide interface for dye-sensitized solar cells (DSSCs). These textures were fabricated through polydimethylsiloxane (PDMS) nanoimprint lithography on organosilsesquioxane solution. The texture structures were estimated via optical simulation. Master molds were anodic aluminum oxide templates with nano-texture (N-Tx) and micro-nano double texture (D-Tx). Meanwhile, replicate molds used a hard PDMS. Fluorine-doped tin oxide and titanium dioxide were deposited on textured glass substrates to generate electrodes for DSSCs. Unlike the DSSCs without texture, textured DSSCs realized 11.4% (N-Tx) and 10% (D-Tx) improvement in conversion efficiency.

DOI： 10.1515/aot-2019-0010

Web of Science

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薄膜金属ガラスの大気中結晶化評価の基礎検討

鬼頭直希, 櫻井淳平, 岡智絵美, 林裕美, 山崎宏明, 秦誠一

精密工学会学術講演会講演論文集 2019A 巻 ( 0 ) 頁： 5 - 6 2019年8月

記述言語：日本語出版者・発行元：公益社団法人精密工学会

本研究では，サンプルとして，ガラス基板上に長さ4 mm，幅1 mm，厚さ500 nmの薄膜金属ガラスPd77Cu7Si16 at.%を10 mm間隔に成膜し，試作した温度傾斜加熱装置により，543 K以下，471 K以上の異なる温度で同時加熱試験を行った．この時の各温度での大気中における結晶化度の時間変化を，放射率変化としてサーモグラフィで捉えることに成功し，XRDにより結晶化度を測定した．

DOI： 10.11522/pscjspe.2019a.0_5

CiNii Research

表面活性化接合用新規高速原子ビームガン

森崎諒, 岡智絵美, 櫻井淳平, 平井隆巳, 高橋知典, 辻裕之, 秦誠一

精密工学会学術講演会講演論文集 2019A 巻 ( 0 ) 頁： 687 - 688 2019年8月

記述言語：日本語出版者・発行元：公益社団法人精密工学会

表面活性化接合は半導体分野における三次元積層技術として利用されている．しかし，表面活性化接合に用いられる高速原子ビームガンは，短時間の使用で内部が磨耗してしまう．そこで，高速原子ビームの高効率な照射により，接合回数に対する相対的な長寿命化を目指す新規高速原子ビームガンの開発を行った．また，新規高速原子ビームガンを用いて，その照射特性を評価し，更なる高性能化を目指した設計指針の確立を目指した．

DOI： 10.11522/pscjspe.2019a.0_687

CiNii Research

Preparation of Nonspherical Monodisperse Polydimethylsiloxane Microparticles for Self-assembly Fabrication of Periodic Structures

Mizoshiri M., Iijima Y., Hata S.

電気学会論文誌Ｅ（センサ・マイクロマシン部門誌） 139 巻 ( 6 ) 頁： 132 - 136 2019年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会

Nonspherical monodisperse polydimethylsiloxane (PDMS) microparticles were fabricated by lithography and ultraviolet ozone (UVO) treatment for self-assembly of periodic structures. PDMS solution was poured into photoresist molds on glass substrates, whereupon it was cured at 80°C. After irradiating ultraviolet to the surface of the PDMS, remaining thin PDMS films on the molds were eliminated using ultrasonic waves. Attenuated-total-reflection Fourier-transform infrared spectra indicated that the surface of the UVO treated PDMS was changed to glass SiO2-like materials, resulting that the remaining thin PDMS films could be ultrasonically removed by fracture. The PDMS microparticles were separated from the substrates using ultrasonic waves, and microparticles of a desired shaped were formed. A suspension was prepared by mixing the PDMS microparticles in deionized water, and a droplet of the suspension was placed on a hydrophobic template substrate. The PDMS microparticles self-assembled on the substrate along the template walls, leading to PDMS microparticles being closely packed. Such PDMS microfabrication would be useful for microdevices.

DOI： 10.1541/ieejsmas.139.132

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Fabrication of a Novel Nanoporous Film via Chemical Dealloying of a Cu-Cr Alloy for Sensing Moisture in Oil 査読有り国際誌

Yoshii, Y; Sakurai, J; Mizoshiri, M; Hata, S

JOURNAL OF MICROELECTROMECHANICAL SYSTEMS 28 巻 ( 2 ) 頁： 279 - 289 2019年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Microelectromechanical Systems

© 1992-2012 IEEE. Based on our prior combinatorial analysis aimed at materials discovery, Cu82Cr18 and Cu80Cr20 were selected in chemical dealloying experiments as candidates for incorporation in sensors for the first time. The Cu82Cr18 film was Cu-dealloyed, altering its composition to Cu25Cr75 after 7 min of dealloying. The dealloyed Cu82Cr18 film exhibited a Cr-based nanoporous structure with 20-40-nm-diameter pores, indicating that Cu was sufficiently dealloyed. In contrast, the Cu80Cr20 film could not be sufficiently Cu-dealloyed, which was consistent with the results of the combinatorial analysis; the original composition was changed to Cu46Cr54 after 7 min, and the pores were not visible. Sensors A and B were fabricated via chemical dealloying of Cu82Cr18 and Cu80Cr20, respectively, and they were evaluated with respect to a reference sensor in both air and oil. The measured hysteresis in the air was 7.4% full scale (FS) for sensor A, which was below the acceptable limit of 10.0% FS, whereas that for sensor B was 13.3% FS. Moreover, the 90% response time in oil was 8 min for sensor A and 10 min for sensor B, as compared to 12 min for the reference sensor; thus, the response time of sensor A was below the acceptable limit of 10 min. [2018-0242]

DOI： 10.1109/JMEMS.2019.2895164

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Draft Genome Sequence of Ralstonia sp. Strain SET104, Isolated from Root Nodules of Aeschynomene indica.

Tanaka A, Suzuki T, Uesaka K, Hata S

Microbiology resource announcements 8 巻 ( 2 ) 2019年1月

FABRICATION AND EVALUATION OF TACTILE PINS FOR PASSIVE TYPE TACTILE DISPLAYS USING HIGH FORMABILITY SHAPE MEMORY ALLOYS

Nambara, K; Iki, K; Oka, C; Hata, S; Sakurai, J

2019 20TH INTERNATIONAL CONFERENCE ON SOLID-STATE SENSORS, ACTUATORS AND MICROSYSTEMS & EUROSENSORS XXXIII (TRANSDUCERS & EUROSENSORS XXXIII) 頁： 1854 - 1857 2019年

記述言語：英語出版者・発行元：2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems and Eurosensors XXXIII, TRANSDUCERS 2019 and EUROSENSORS XXXIII

© 2019 IEEE. We report on the fabrication and evaluation of tactile pins for passive-type tactile displays using high formable Ti-Ni-Cu shape memory alloy. These pins were fabricated by utilizing a viscous flow of Ti-Ni-Cu metallic glass. After crystallization, the material transformed to a shape memory alloy and was driven by the superelastic effect. In this manner, we successfully acquired the desired three-dimensional structure and measured a reaction force of 20 mN or larger, necessary to deform the skin. Additionally, we successfully varied the reaction force by controlling the temperature and demonstrated the potential application of these tactile pins.

DOI： 10.1109/transducers.2019.8808618

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高成形性形状記憶合金の耐食性のコンビナトリアル評価

千須和要, 岡智絵美, 秦誠一, 櫻井淳平

機械材料・材料加工技術講演会講演論文集 2019.27 巻 ( 0 ) 頁： 207 2019年

手術シミュレータ用リアルタイム光弾性3次元応力測定系の開発

山田大地, 堀史門, 岡智絵美, 櫻井淳平, 秦誠一

機械材料・材料加工技術講演会講演論文集 2019.27 巻 ( 0 ) 頁： P01 2019年

テクスチャ基板による色素増感太陽電池の変換効率の向上

西保裕司, 楊娜, 岡智絵美, 秦誠一, 櫻井淳平

機械材料・材料加工技術講演会講演論文集 2019.27 巻 ( 0 ) 頁： P04 2019年

逆リフトオフ法を用いたMEMSミラー構造体の作製

山田恭平, 中川優希, 岡智絵美, 櫻井淳平, 吉田沙織, 清元智文, 秦誠一

年次大会 2019 巻 ( 0 ) 頁： J22208P 2019年

Effect of Heat Accumulation on Femtosecond Laser Reductive Sintering of Mixed CuO/NiO Nanoparticles 査読有り

Mizoshiri, M; Nishitani, K; Hata, S

MICROMACHINES 9 巻 ( 6 ) 2018年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Micromachines

Direct laser-writing techniques have attracted attention for their use in two- and three-dimensional printing technologies. In this article, we report on a micropatterning process that uses femtosecond laser reductive sintering of mixed CuO/NiO nanoparticles. The writing speed, laser fluence, and incident total energy were varied to investigate the influence of heat accumulation on the micropatterns formed by these materials. Heat accumulation and the thermal history of the laser irradiation process significantly affected the material composition and the thermoelectric properties of the fabricated micropatterns. Short laser irradiation durations and high laser fluences decrease the amount of metal oxide in the micropatterns. Selective fabrication of p-type and n-type thermoelectric micropatterns was demonstrated to be possible with control of the reduction and reoxidization reactions through the control of writing speed and total irradiation energy.

DOI： 10.3390/mi9060264

Fabrication of a novel nanoporous film by chemical dealloying of CU-CR and its application for a sensor

Yoshii Y., Sakurai J., Mizoshiri M., Hata S.

Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS) 2018-January 巻頁： 1104 - 1107 2018年4月

出版者・発行元：Proceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)

In this study, novel transparent nanoporous films exhibiting insulating properties were fabricated by a new chemical dealloying method of Cu-Cr with no requirement of high-temperature annealing. Furthermore, for the first time to the best of our knowledge, the fabricated nanoporous film was successfully applied as a nanoporous electrode film filter of a moisture-in-oil sensor: The fabricated moisture-in-oil sensor exhibited outstanding sensitivity and a low hysteresis of 7.4% FS in air, which was less than the desired value of 10.0% FS. Furthermore, the sensor exhibited a favorable 90% response time in oil, which was 8 min and well less than the desired value of 10 min.

DOI： 10.1109/MEMSYS.2018.8346753

Scopus

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