The winner of the Environmental Science & Technology Letters 2019 Best Paper Award. 卒業生Alumni: Dr. Masao Gen’s paper published (worked with Prof. Chak K. Chan, Dean and Chair Professor in School of Energy and Environment at City University of Hong Kong) in Environmental Science & Technology Letters (ACS米国化学会の雑誌) was selected as the Best ES&T Letters Papers of 2019. (M. Gen, R. Zhang, D. D….
Tag: aerosol
On particles emitted from mouth (JAAST）口腔内から発せられたエアロゾル粒子に関して（日本エアロゾル学会）
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!」
Statement on Mask-wearing (JAAST) マスク装着に関して（日本エアロゾル学会）
Point-1.「繊維の隙間より小さい粒子はマスクのフィルターを通過する」は間違い “Particles smaller than the fiber gap pass through the filter of the mask” is not accurate
Point-2. 大事なことはマスクのフィルター性能より,マスクの縁と顔表面との隙間からの漏れ（侵入）を少しでもなくすこと。It is important to eliminate the leakage (intrusion) from the gap between the mask edge and the face surface, rather than the filter performance of the mask.
Localization of “Water-Soluble” Particles on Leaf Surfaces. 植物葉における水溶性粒子の局在の可視化
The particles were deposited on the surfaces of the leaves and needles in the same manner, regardless of leaf structure. 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
Low-cost, portable, aerosol/particulate sensor. 低コストで携帯型（気中浮遊）粒子計測器
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。
PAPER: Can particles move and deposit, from 25 to 40 deg-C surface? ～40℃表面に微粒子を集積させた流体の制御技術
Can particles move from 25-deg.C on to 40-deg.C surface? 40℃表面に気相中（20℃）微粒子をどのように沈着させる？
Between surface charges of colloidal particles and their charged aerosols.液中粒子の表面電荷とそれらのエアロゾル化時の荷電との関係
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。
From a single candle: we made both hydrophilic & hydrophobic particle layers. 同一ロウソクから親水性と疎水性の両方の粒子層を作りました
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？
Thermal convections break the droplet? For particle synthesis. 熱対流が浮遊ミストを破壊した後に化学反応・熱分解＝粒子の新しい合成法
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。
Spraying water-soluble particles on the crop. 作物に水溶性微粒子を散布した実験
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…
Does the leaf structure prevent the deposition of aerosols? 葉の構造はエアロゾルの付着を防止する？
Epicuticular “wax” crystals affect distribution of incoming particles on needles (leaf surfaces). Densely distributed “wax” might prevent the deposition of sub-micron particles on the surfaces of needles to retain the function of stomata. スギ（代表的な針葉樹種）の葉表面に人工的に散布されたsub-micronの炭素系粒子の局在を調べた。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。
PAPER: Charge of Particle by Kelvin Probe Force Microscopy. ケルビンフォース顕微鏡で粒子の帯電を計測
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
