大気に浮遊する微粒子の沈着の場所について考えてみた。”Wet”微粒子は「親水性の高い」場所に多く沈着する。”Dry”微粒子”は「親水性の低い」場所に多く沈着する。Considered the location of the deposition of particles suspended in the air. The results: “More hydrophilic” area trapped more “wet” particles. The “less hydrophilic” area trapped more “dry” particles.
Tag: Transport
口腔から発せられた微粒子と換気 Particles from the mouth & Ventilation
Air flow and ventilation or air purifiers are necessary to expel aerosol particles floating in closed spaces!「閉空間に漂うエアロゾル粒子を追い出すには空気の流れと換気・空気清浄機が必要です!」
開発の事例：微粒子の合成と構造化 Example of Technology: Synthesis & Structuring of Particles (2018-2019)
浮遊する微粒子の構造化と集積化について、従来まで考証されていなかった物質の輸送に対する「駆動力のバランス」の視点からの技術手法を開発した。We have developed methods for synthesis & structuring suspended particles from the viewpoint of “balance of the driving force on the transport of matter”, which has not been considered before.
【植物とエアロゾル】植物葉における水溶性粒子の局在の可視化 Localization of “Water-Soluble” Particles on Leaf Surfaces
堆積した粒子は凝集せず、葉の構造に依存性がないことを確認した
The particles were deposited on the leaves and needles in the same manner, regardless of leaf structure.
【材料合成技術】電極の設計による水中の磁鉄鉱ナノ粒子の量産化. Design of electrode structure for production of magnetite nanoparticles in water.
◆環境に優しい（磁性）ナノ粒子製造プロセスを提案。◆水と鉄（電極）以外に化学薬品は必要ない
*Environmentally friendly process for (magnetic) nanoparticles. *No chemicals are needed, except water and iron (electrode).
【環境計測技術】低コスト・携帯型、エアロゾル計測器の開発 Low-cost, portable, aerosol sensor
Arduino-based real-time PM10 sensor, with temperature and humidity. マイクロコントローラArduinoを用いたオンラインPM10 (10μm未満の粒子状物質) 測定を開発。数Ⅰ000 μg/m3 の濃度も測定可。
【医療機器】40℃の表面に気中微粒子を沈着させた流体制御 Can aerosol particles move/deposit, from 25 to 40 ℃ surface?
閉鎖空間における沈着を考慮したエアロゾルフローシステムを構築した。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。An aerosol flow system has been constructed to mimic the delivery of particles to the air-liquid interface. Potentially be applied for the deposition and analysis of submicron particles on various types of substrate without the need for vacuum imaging analysis..
【デバイス化技術】液体中の粒子の電荷とエアロゾル化時の帯電による粒子膜の光学特性の調整 Tuning the optical properties of particle films by particle charges (in liquid and in gas-phase)
Interaction between surface charge (zeta potential) of colloidal nanoparticles and the charge induced droplets suspended in the gas phase by electrospray is investigated for the first time. 液相中のナノ粒子の表面電荷（ゼータ電位）と気相中操作（静電噴霧）により懸濁液滴の荷電（電荷）の間の相互作用について初めての研究。
【材料合成技術】同一ロウソクから親水性と疎水性の両方の粒子層が製造可能 From a single candle: we can make both hydrophilic & hydrophobic layers.
Using “soot” from a candle burning, we developed assembly routes to form hydrophilic or hydrophobic layers of carbonaceous nanoparticles. ロウソク燃焼の「煤」を用いて、親水性または疎水性を有するナノ粒子膜の作製する方法を開発。5000年前に中国で開発された、従来の「墨」技術と同じかどうか？
【材料合成技術】熱対流による浮遊液滴の破壊、物質の微粒化。Destruction of aerosol droplets (size-reduction of materials) by thermal convection: New Synthesis Route
Discovery of a low-energy route to layer of nanometer-sized particles with high crystallinity. 高結晶性を有するナノ粒子層への「省エネプロセス」の発見。
【植物とエアロゾル】作物・小松菜に水溶性微粒子を長期的に散布したら・？ What happens after long-term spraying of water-soluble fine particles on a crop (komatsuna)?
Short Introductions of other papers: /paper/ Komatsuna plants were grown and exposed to ammonium sulfate (((NH4)2SO4), AS) submicron particles for 16 days (22.5 µg m−3 per day) in phytotrons. The amount of particles deposited on the leaf decreased over time, because AS particles deposited on the leaf deliquesced, allowing ions such as SO42− in the…
【植物とエアロゾル】葉の構造は大気汚染物質の付着を防ぐ？Does the leaf structure prevent the aerosol deposition?
Epicuticular “wax” crystals affect distribution of incoming particles on leaf surfaces. 気孔の機能を保持するために密に分布されたワックスは、気中からの微粒子の付着を防止する役割があるかもしれません。
【食品プロセス】高分子繊維中に固定化された酵素が再利用できるか？ Can enzymes immobilized in (200 nm) polymer fibers be reused?
Enzyme in polymer-nanofibers show excellent immobilization efficiency. 高分子ナノファイバー中の酵素は優れた「固定化」効率を示す。
【環境計測技術】表面電位顕微鏡で大気中から捕集した粒子の帯電状態を調べたCharging state of particles collected from the air by K-F Microscope.
呼吸により人体に入る微粒子の帯電状態が注目された。本研究では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
捕集された大気粒子の帯電状態を調べた。The charged state of the collected atmospheric particles (PM2.5) was examined.
Charging state is important to understand the process of adverse health effects of PM. 健康影響を調べるために微粒子の帯電状態を知ることは重要
PM2.5 collected on the filters were likely to carry a negative charge 捕集された微粒子の帯電状態は主にマイナス帯電
Student presented “Pump-less spraying”: Symposium of Institute for Liquid Atomization & Spray Systems, 微粒化シンポジウム
2014/12/18, Hirosaki City (Aomori Pref.) 第23回 微粒化シンポジウム 23rd Symposium of the Institute for Liquid Atomization and Spray Systems – Japan (A133) 毛細管現象を利用した Pumpless 静電微粒化法に関する研究 (M2)竹松 佑介, Wuled Lenggoro 通常の駆動力である液体供給装置（ポンプ）を用いない、毛細管現象だけで静電気力型噴霧法の開発。工夫を加えたところ数時間運転が可能であることも判明 Presentation by student. 学生による学会等の発表
【環境計測技術】微粒子の散布による表面上の分子層を可視化 Visualization of “molecular layer” by nanoparticles.
Aerosol nanoparticle sensor system for probing a layer of organic molecules, at sub-100 nm resolution . 応用：残留農薬, PM2.5, 半導体表面の検査
【植物に学んだ技術】正帯電した気中粒子が親水性が高い表面に付きやすい Plus-charged aerosols easily arrive onto wet part of a “leaf” surface: Learning from the Nature
（現象の発見）正帯電した気中浮遊粒子（エアロゾル）が親水性が高い表面に付きやすい。
応用例：大気汚染と植物表面の理解。新しい材料の開発。
【デバイス化技術】水中浮遊粒子を100nm以下の穴に固定化できる？Can particles in water be immobilized in sub-100 nm holes?
水中浮遊粒子を100nmの穴に固定化できるのか？サンドイッチ型複合材料？
2008年に特許出願した技術の応用例。
An example application of our patented Pulse Electrophoretic Deposition (PEPD) Method.
Kusdianto, Doctoral presentation, 19 Aug. 2014, 博士論文公聴会
19 Aug. 2014. BASE 1st floor meeting room DOCTORAL THESIS: The role of chemical and physical properties of substrate in the deposition of particles 粒子の沈着における基板表面の物理的・化学的特性の役割 by KUSDIANTO (Also a faculty member of Department of Chemical Engineering, Institut Teknologi Sepuluh Nopember, ITS)
【食品プロセス】酵素粒子はどこまで小さくできるのか？How small can the enzyme be ?
http://dx.doi.org/10.1016/j.enzmictec.2014.06.002 Transformation of an enzyme: from aqueous suspension to fine solid particles via electrospraying route 静電噴霧法による糖転移酵素の微粒化 by* Dept. of Process and Food Engineering, Univ. Putra Malaysia; * Biotechnology Research Institute, Univ. Malaysia Sabah; * Faculty of Chemical Engineering, Univ. Teknologi MARA; * Grad. School of Bio-Applications and Systems Engineering, Tokyo Univ. of Agriculture and Technology…
【環境技術】薄板の裏側まで微粒子が沈着？Are the particles deposited to the back of a sheet?
Simultaneous deposition of submicron aerosols onto both surfaces of a plate substrate by electrostatic forces We demonstrate one-step deposition of submicrometer-sized particles suspended in the gas-phase onto a plate type substrate using an electrostatic-assisted spray system. The particles were deposited on plate-type metallic surfaces, on both front and rear sides of the substrate. This “both-side”…
PAPER: with a project funded by MEXT Kakenhi (2011-2014)科研費の成果
科研費の結果に関するサイトです。 （研究課題番号：23560904） PROJECT TITLE: Multi-dimensional assembly and assessment of high-crystalline fine particles via charged aerosol route. 帯電エアロゾルを用いた高結晶性微粒子の多次元集積と評価 ARTICLE Simultaneous deposition of submicron aerosols onto both surfaces of a plate substrate by electrostatic forces M. Gen, S. Ikawa, S. Sagawa, I. W. Lenggoro e-Journal of Surface Science and Nanotechnology, 2014. http://dx.doi.org/10.1380/ejssnt.2014.238 ARTICLE Area-selective deposition of charged particles…
【植物と微粒子】2年間、水溶性微粒子を植物に与えたら？Effect of water-soluble particles on growth of plants (2 years)
JOURNAL: Atmospheric Environment (2014)http://www.sciencedirect.com/science/article/pii/S1352231014000405 Effects of 2-years exposure to (sub-micron) ammonium sulfate particles on growth and gas exchange rates of Fagus crenata (ブナ), Castanopsis sieboldii (スダジイ), Larix kaempferi (唐松) and Cryptomeria japonica (スギ) seedlings •No significant effect of the particles on growth was observed after 2 years.•Net photosynthetic rates of 3 species were not significantly changed.•Net photosynthesis of…
