Adhesion mechanism of carbon-nanotube-based gecko tapes as the supportive device for particular solids

• Project/Area Number: 20H02029
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 18010:Mechanics of materials and materials-related
• Research Institution: Osaka University
• Principal Investigator: Hirahara Kaori 大阪大学, 大学院工学研究科, 准教授 (40422795)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Project Status: Completed (Fiscal Year 2022)
• Budget Amount: ¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000); Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2021: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000); Fiscal Year 2020: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
• Keywords: カーボンナノチューブ / 接着 / 地球外物質解析 / 高速接触 / 衝撃吸収 / ヤモリテープ / 衝撃吸収特性 / 粒子捕集 / 走査電子顕微鏡 / 力学試験 / 電子顕微鏡 / 撃力

Outline of Research at the Start

カーボンナノチューブ(CNT)からなるヤモリ足裏構造を模した人工粘着テープ（CNTヤモリテープ）は、物質解析において最も理想的な粘着式試料支持体になり得るが、その実現には強い圧着による劣化の解決が必須であり、マイクロメートルサイズの粒子に対する接着特性の理解も十分でない。
CNTヤモリテープのマイクロ粒子への接着・剥離過程での力学計測やその場観察を行い、個々のCNTの接着・摩擦特性、CNT凝集構造に由来するマクロな弾性・衝撃吸収特性等が階層的におりなすテープの力学を解き明かして制御し、不定形粒子試料支持用途での超強力接着を実現するCNT形態、非劣化強接着を実現する予荷重負荷機構の確立をめざす。

Outline of Final Research Achievements

That study proposed an adhesion process of carbon-nanotubes (CNTs) based Gecko tapes for tiny particles with impact preloading to achieve efficient and strong adhesion, instead of a conventional method with strong and slow compression of whole CNTs, and its usefulness was demonstrated. The 1 mm-50um sized particles were individually contacted with vertically aligned CNTs (VACNTs), and the adhesive properties and deformation process of VACNTs were evaluated at both microscopic and macroscopic scales. Experimental results indicated that the adhesive strength was effectively improved by high-speed loading at 2-7 m/s compared to the conventional method. in situ electron microscopy experiments showed that CNTs at the adherent interface were efficiently deformed, obtaining true contact areas that would be the origin of good adhesion by high-speed loading. Moreover, the effects of shock absorption, crack propagation, and aggregation morphology of VACNTs were also investigated.

Academic Significance and Societal Importance of the Research Achievements

CNTの配向凝集体からなるヤモリテープは、その構造由来の興味深い諸特性を有するものの、強く押しつけることによるテープの劣化が，その応用展開を阻んできた主な理由といえる。本研究は、完全に配向CNTを潰すところまで押しつけなくても従来より強い接着が得られる方法を提示できた。本研究で得た成果は、配向CNTの基礎研究と応用を繋ぐ意義を有し、結果として、新奇デバイス創成に寄与することとなった。本研究の出発点は、惑星科学分野でのニーズだが、その活用によって、将来広い分野での物質構造解析の進展にも繋がる。また、構造解析に留まらず、成層圏汚染調査、電子部品の排熱基盤などへの応用展開が拓ける可能性もある。

Research Products

• [Journal Article] Insight into multi-step geological evolution of C-type asteroids from Ryugu particles (2023)
  • Author(s): Yamaguchi A., Tomioka N., Ito M., Shirai N., Kimura M., Greenwood R. C. et al.
  • Journal Title: Nature Astronomy Volume: 7 Issue: 4 Pages: 398-405
  • DOI: 10.1038/s41550-023-01925-x
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A history of mild shocks experienced by the regolith particles on hydrated asteroid Ryugu (2023)
  • Author(s): Tomioka Naotaka、Yamaguchi Akira、Ito Motoo、Uesugi Masayuki、Imae Naoya、Shirai Naoki、Ohigashi Takuji、Kimura Makoto、Liu Ming-Chang、Greenwood Richard C., et al.
  • Journal Title: Nature Astronomy Volume: 7 Issue: 6 Pages: 1-9
  • DOI: 10.1038/s41550-023-01947-5
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A pristine record of outer Solar System materials from asteroid Ryugu’s returned sample (2022)
  • Author(s): Ito M.Tomioka N.Uesugi M.Yamaguchi A.Shirai N.Ohigashi T.Liu M.-C.Greenwood R. C.Kimura et al.
  • Journal Title: Nature Astronomy Volume: 6 Issue: 10 Pages: 1163-1171
  • DOI: 10.1038/s41550-022-01745-5
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Modeling the particle capture performance by vertically aligned carbon nanotubes for a comet rendezvous sample return (2022)
  • Author(s): Serizawa Ryota、Yano Hajime、Takeda Yuki、Oizumi Shuto、Ishibashi Yukihiro、Arai Kazuyoshi、Li Yuexuan、Hirahara Kaori、Hirai Takayuki、Sun Yuchen、Kooi Steven E.、Nelson Keith A.
  • Journal Title: Advances in Space Research Volume: 69 Issue: 7 Pages: 2787-2797
  • DOI: 10.1016/j.asr.2021.10.013
  • Peer Reviewed / Int'l Joint Research
• [Presentation] ONE YEAR ON! A SUMMARY OF THE ANALYTICAL WORK ON RYUGU PARTICLES CONDUCTED BY PHASE2 KOCHI CURATION (2022)
  • Author(s): M. Ito, N. Tomioka, M. Uesugi, A. Yamaguchi, N. Imae, N. Shirai, T. Ohigashi, M. Kimura, M.-C., Liu, R.C. Greenwood, K. Uesugi, A. Nakato, K. Yogata, H. Yuzawa, Y. Kodama, A. Tsuchiyama, M. Yasutake, R. Findlay, I.A. Franchi, J.A.Malley, K.A. McCain, N. Matsuda, K.D. McKeegan, K. Hirahara, A. Takeuchi, et al.
  • Organizer: MetSoc 2022
  • Int'l Joint Research / Invited
• [Presentation] 小惑星リュウグウ表層粒子の衝撃変成 (2022)
  • Author(s): Richard,上杉健太郎, 中藤亜衣子, 与賀田佳澄, 湯沢勇人, 兒玉優, 平原佳織, 櫻井郁也,岡田育夫, 唐牛譲,岡崎啓史, 野口高明, 三宅亮, 宮原正明, 瀬戸雄介, 松本徹, 伊神洋平, はやぶさ２キュレーションチーム, 臼井寛裕, 渡邉誠一郎, 津田雄一
  • Organizer: 日本鉱物科学会2022年年会
• [Presentation] Application of carbon nanotube-based gecko adhesive tapes for aerospace materials science (2022)
  • Author(s): K. Hirahara
  • Organizer: 第63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
  • Invited
• [Presentation] Hayabusa2 returned samples: Unique and pristine record of Solar System materials from asteroid Ryugu (2022)
  • Author(s): M. Ito, N. Tomioka, M. Uesugi, A. Yamaguchi, N. Imae, N. Shirai, T. Ohigashi, M. Kimura, M-C, Liu, R.C. Greenwood, K. Uesugi, A. Nakato, K. Yogata, H. Yuzawa, Y. Kodama, A. Tsuchiyama, M. Yasutake, R. Findlay, I.A. Franchi, J.A. Malley, K.A. McCain, N. Matsuda, K.D. McKeegan, K. Hirahara, A. Takeuchi, et al.
  • Organizer: 日本地球惑星科学連合2022年大会（JpGU2022）
  • Invited
• [Presentation] Chemical characteristics of Ryugu particles returned by the Hayabusa2 spacecraft (2022)
  • Author(s): N. Shirai, M. Ito, N. Tomioka, M. Uesugi, A. Yamguchi, N. Imae, T. Ohigashi, M-C. Liu, R.C. Greenwood, M. Kimura, S. Sekimoto, K. Uesugi, A. Nakato, K. Yogata, H. Yuzawa, Y. Kodama, M. Yasutake, K. Hirahara, A. Takeuchi, I. Sakurai, I. Okada, Y. Karouji, T. Yada, M. Abe,
  • Organizer: 日本地球惑星科学連合2022年大会（JpGU2022）
• [Presentation] Characterization of organic materials in Ryugu particles and investigation for their origin and nature (2022)
  • Author(s): M. Uesugi, H. Yuzawa, T. Ohigashi, M. Ito, N. Tomioka, Y. Kodama, N. Shirai, K. Uesugi, A. Yamaguchi, N. Imae, M. Kimura, A. Nakato, K. Yogata, K. Hatakeda, A. Miyazaki, T. Yada, M. Abe, K. Hirahara, I. Sakurai, I. Okada, M.-C. Liu, R. C Greenwood
  • Organizer: 日本地球惑星科学連合2022年大会（JpGU2022）
• [Presentation] Multiscale characterization of the Asuka 12169 meteorite; rehearsal of Hayabusa2 returned sample analysis (2021)
  • Author(s): M. Uesugi, M. Ito, N. Tomioka, N. Imae, A. Yamaguchi, M. Kimura, N. Shirai, T. Ohigashi, M-C. Liu, R.C Greenwood, K. Uesugi, A. Nakato, K. Yogata, H. Yuzawa, Y. Kodama, M. Yasutake, K. Hirahara, A. Takeuchi, I. Sakurai, I. Okada, Y. Karouji, T. Yada, M. Abe
  • Organizer: The 12th Symposium on Polar Science
• [Presentation] Hayabusa2 Returned Samples: Unique and Pristine Record of Solar System Materials from Asteroid Ryugu (2021)
  • Author(s): M. Ito, N. Tomioka, M. Uesugi, A. Yamaguchi, N. Imae, N. Shirai, T. Ohigashi, M. Kimura, M-C, Liu, R.C. Greenwood, K. Uesugi, A. Nakato, K. Yogata, H. Yuzawa, Y. Kodama, A. Tsuchiyama, M. Yasutake, R. Findlay, I.A. Franchi, J.A. Malley, K.A. McCain, N. Matsuda, K.D. McKeegan, K. Hirahara, A. Takeuchi, et al.
  • Organizer: The 53rd Lunar and Planetary Science Conference (LPSC 2022)
  • Int'l Joint Research
• [Presentation] The C-type asteroid Ryugu: A first detailed look by Phase2 Curation Kochi (Ph2K) (2021)
  • Author(s): M. Ito, N. Tomioka, M. Uesugi, A. Yamaguchi, N. Imae, N. Shirai, T. Ohigashi, M. Kimura, M-C. Liu, R.C Greenwood, K. Uesugi, A. Nakato, K. Yogata, H. Yuzawa, Y. Kodama, M. Yasutake, R. Findlay, I.A. Franchi, Malley J., K. Hirahara, A. Tsuchiyama et al.
  • Organizer: Hayabusa symposium 2021
  • Int'l Joint Research
• [Presentation] Carbon nanotube-based gecko tapes as supportive devices for microparticles (2021)
  • Author(s): K. Hirahara
  • Organizer: The International Chemical Congress of Pacific Basin Societies 2021 (Pacifichem 2021)
  • Int'l Joint Research / Invited
• [Presentation] Effect of Impact Preloading on The Adhesion of Carbon Nanotube Gecko Tapes Against The Collision of Stainless Steel Balls (2020)
  • Author(s): M. Abe, K. Hirahara
  • Organizer: MNC2020
• [Remarks] 小惑星リュウグウ：太陽系外縁部からの来訪者 多機関連携分析が読み解いた小惑星の記録
  • URL: https://resou.osaka-u.ac.jp/ja/research/2022/20220816_1
• [Remarks] 小惑星リュウグウの活発な地質活動の歴史が明らかに
  • URL: https://resou.osaka-u.ac.jp/ja/research/2023/20230321_1
• [Remarks] 小惑星リュウグウ粒子の微小断層から読み解く天体衝突
  • URL: https://resou.osaka-u.ac.jp/ja/research/2023/20230421_3