ワーク ショップ プログラム ニホン ノ ベトナム カンケイ アーカイブズ ベトナム ノ ニホン カンケイ アーカイブズ サンカキ

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アンドウ マサヒト クボ トオル ヨシダ ユタカ ヘン レキシガク ガ トウ コウブンショ ノ カンリ ト ジョウホウ コウカイ トクテイ ヒミツ ホゴホウカ ノ カダイ. ホッカイドウ シンブンシャ ヘン トクテイ ヒミツ ホゴホウ オ ヨム ゼン ジョウブン ハンタイ セイメイ イケンショ

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Size dependent nanomechanics of coil spring shaped polymer nanowires

Direct laser writing (DLW) via two-photon polymerization (TPP) has been established as a powerful technique for fabrication and integration of nanoscale components, as it enables the production of three dimensional (3D) micro/nano objects. This technique has indeed led to numerous applications, including micro- and nanoelectromechanical systems (MEMS/NEMS), metamaterials, mechanical metamaterials, and photonic crystals. However, as the feature sizes decrease, an urgent demand has emerged to uncover the mechanics of nanosized polymer materials. Here, we fabricate coil spring shaped polymer nanowires using DLW via two-photon polymerization. We find that even the nanocoil springs follow a linear-response against applied forces, following Hooke’s law, as revealed by compression tests using an atomic force microscope. Further, the elasticity of the polymer material is found to become significantly greater as the wire radius is decreased from 550 to 350 nm. Polarized Raman spectroscopy measurements show that polymer chains are aligned in nanowires along the axis, which may be responsible for the size dependence. Our findings provide insight into the nanomechanics of polymer materials fabricated by DLW, which leads to further applications based on nanosized polymer materials

キロク ヲ マモル ノハ ダレカ アームストロング ジケン ガ シメシタ カダイ

研究ノー

GCAS サブゼミ 2018 2020 カツドウ ホウコク

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実習指導者-教員の協働状況とユニフィケーション活動との関係

本研究の目的は、実習における実習指導者?教員の協働に関わる現状を把握し、指導体制およびユニフィケーション活動が実習指導者?教員の協働的な活動に及ぼす影響を明らかにすることである。A大学看護教員と実習先の2施設の実習指導者（以下、指導者）に無記名自記式質問紙調査を実施した。51の有効回答を分析した結果、意思決定、協調性、情報共有において、教員が指導者よりも協働の認識は高く、協調性、情報共有に有意差が見られた。実習指導者?教員の協働に、ユニフィケーション活動の企画・実施した者が3因子とも高く、協調性に有意差があった。ユニフィケーション活動の場や機会が両者のコミュニケーションを促進し、実習指導の協働に影響を与えることが示唆された

3D microfabrication of single-wall carbon nanotube/polymer composites by two-photon polymerization lithography

We present a method to develop single-wall carbon nanotube (SWCNT)/polymer composites into arbitrary three-dimensional micro/nano structures. Our approach, based on two-photon polymerization lithography, allows one to fabricate three-dimensional SWCNT/polymer composites with a minimum spatial resolution of a few hundreds nm. A near-infrared femtosecond pulsed laser beam was focused onto a SWCNT-dispersed photo resin, and the laser light solidified a nanometric volume of the resin. The focus spot was three-dimensionally scanned, resulting in the fabrication of arbitrary shapes of SWCNT/polymer composites. SWCNTs were uniformly distributed throughout the whole structures, even in a few hundreds nm thick nanowires. Furthermore, we also found an intriguing phenomenon that SWCNTs were self-aligned in polymer nanostructures, promising improvements in mechanical and electrical properties. Our method has great potential to open up a wide range of applications such as micro- and nanoelectromechanical systems, micro/nano actuators, sensors, and photonics devices based on CNTs.the National Science Foundation Grant No. OISE-096840