Tag: biosystem

Nature-Inspired Technology: From Leaf Surfaces to Smart Materials 自然の設計図で創る材料科学：電界・エアロゾル・微細構造

自然と工学の交差点から生まれた3つの革新技術―ESPI、SERS AeroMapper、PhytoSurface μSelect™―を紹介。植物の葉に学んだ粒子のふるまいを応用し、微細孔への浸透、空中ナノセンシング、マイクロパターニングなど、エネルギー・医療・環境分野に新たな可能性を拓きます。At the intersection of nature and engineering, this blog introduces three breakthrough technologies—ESPI, SERS AeroMapper, and PhytoSurface μSelect™—each inspired by how particles interact with plant surfaces. From deep pore infiltration to airborne nanosensing and micron-scale patterning, these innovations offer new solutions for energy, medicine, and environmental science.

[REVIEW] Transport of Nanoparticles into Plants & Their Detection Methods 植物に移動するナノ粒子とその検出方法 

Transport of Nanoparticles into Plants and Their Detection Methods 植物に移動するナノ粒子とその検出方法  Open access: https://doi.org/10.3390/nano14020131 CITATION: https://app.dimensions.ai/details/publication/pub.1167718478 https://encyclopedia.pub/entry/54020 Nanoparticle transport into plants is an evolving field of research with diverse applications in agriculture and biotechnology. This article provides an overview of the challenges and prospects associated with the transport of nanoparticles in plants, focusing on delivery methods…

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Published) Deposition of submicron aerosols by closed-loop flow. 閉鎖循環流システムによるエアロゾル粒子の堆積 (Takahashi Award)

沈着効率が悪い従来法に代わって本手法を気液界面細胞曝露に応用できれば有用である。Our method presented here may potentially be applied for the deposition and analysis of submicron particles on various types of substrate (i.e. air-liquid interface) without the need for vacuum imaging analysis (e.g. electron microscopy).

Award: Charging state of particles collected from air 大気中から捕集した粒子の帯電状態を調べた（学会賞）

呼吸により人体に入る微粒子の帯電状態が注目された。大気中に浮遊する微粒子の帯電状態を評価できる手法を考案。The importance of electrostatic charging state to particle deposition in the human airways has been suggested. We developed a measurement method of electrostatic charging state of individual ambient aerosol particles

Learning from Leaf Surfaces – Patterning Aerosols by Hydrophilicity Gradients. 植物の葉と帯電微粒子。親水性と表面電位が誘う選択的パターニング

植物の静電気現象にヒントを得た、百ナノメートルの解像度を持つマイクロ選択堆積技術。表面の親水性度または電位差（帯電量）分布を計測。 *A micro-selective deposition technology inspired by plant electrostatics, offering sub-micron resolution for measuring surface hydrophilicity or potential difference (equivalent to electric charge) distribution.

Aerosols Behind the Leaf: Uncovering Hidden Deposition Mechanisms 🍃葉の裏側に沈着する微粒子：静電スプレーによる両面堆積のメカニズム

本研究では、静電スプレー（静電噴霧）を用いて、サブミクロン粒子が平板基板の表裏両面に同時に沈着する現象を実証しました。粒子の偏向とドリフトによるこの堆積メカニズムは、植物葉への微粒子沈着や静電塗装技術への応用に貢献します。This study demonstrates the simultaneous deposition of submicron aerosol particles on both sides of a flat substrate using electrostatic spray. The mechanism involves particle deflection on the front side and drift around to the rear, offering insights into aerosol behavior on plant leaves and applications in electrostatic coating.

博士D. Thesis (2014) Immobilization of particles from gas phase onto surfaces 気相からの粒子の基板への固定化

Immobilization of submicron- and nano-particles from gas phase onto solid surfaces by external forces （外力を用いたサブミクロン粒子とナノ粒子の気相から固体基板への固定化）(Thesis is written in English) 2014/5/23 Friday, 15:00 ~ 16:30, BASE1階会議室 発表者： 玄　大雄 (GEN, Masao) ** ** After working with WPI-AIMR, Tohoku University as Assistant Professor, he joined City University of Hong Kong  In 2024 he became a Associate Professor/PI at…

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Water-soluble “air pollution” particles to Forest Tree Species for 2 years. 水溶性の大気汚染粒子を森林樹種に2年間散布した

Four Japanese forest tree species were exposed to submicron ammonium sulfate particles for two years. While growth and photosynthesis in Fagus crenata, Castanopsis sieboldii, and Larix kaempferi remained unaffected, Cryptomeria japonica showed both increased and decreased photosynthetic responses. This study highlights species-specific sensitivity to sulfate (aerosol) particles. 4種の日本の森林樹木に、サブミクロンサイズの硫酸アンモニウム（エアロゾル）粒子を2年間散布。ブナ、スダジイ、カラマツでは成長や光合成に有意な影響は見られなかったが、スギでは光合成速度の増加と減少の両方が観察され、エアロゾル粒子への感受性が示された。

Deposition process of aerosols into forest/ 森林へのエアロゾル沈着過程を解明

Particulate matter strongly adsorbed onto leaf surfaces is not washed away by rainfall and contributes to the EC (Elemental Carbon) flux. Leaf-surface particles must be included when evaluating the dry and total fluxes of particulate matter, in particular for water-insoluble constituents such as EC. 葉面に強く「付着」した粒子状物質は降雨によって洗い流されず、EC(元素炭素)フラックスに寄与する。粒子状物質、特にECのような水不溶性成分の乾燥流束および全流束を評価する場合には、葉表面粒子を含めなければならない。

Effects of Black Carbon Particles on Forest Tree Species Growth & Gas Exchange Rates 森林樹種の成長とガス交換率に及ぼす黒色炭素粒子の影響

世界初となる、森林樹木の苗木に対するサブミクロンサイズの黒色炭素粒子の長期曝露実験を実施。ブナ、スダジイ、カラマツ、スギの4種において、2シーズンにわたる曝露後も成長やガス交換率に有意な変化は見られませんでした。葉面に堆積した粒子は、光合成や気孔機能に影響を与えないことが示唆されました。 The world’s first long-term exposure experiment using submicron black carbon (BC) particles on living forest tree seedlings. Over two growing seasons, Fagus crenata, Castanopsis sieboldii, Larix kaempferi, and Cryptomeria japonica showed no significant changes in growth or gas exchange rates. The results suggest that foliar-deposited BC particles did not interfere with photosynthesis or stomatal function.