K. Sano was a student of Tachikawa High School (Tokyo) 東京都立立川高等学校) who joined our lab as the first fellow of TUAT-JST-GIYSE Program (2018-2020). His project was about the collection of PM2.5 aerosols using a mask/filter surface. Link: TUAT (Environ. & Natural Resource Sci.) 東京農工大学（農学部）環境資源科学科 Our former members 研究室の元メンバー
Tag: aerosol
サブミクロン粒子の離脱という難題に低出力型超音波洗浄機で何ができるのか？What can a low-power ultrasonic cleaner do for removing submicron particles?
sub-micron粒子が堆積された基板を数百nm炭素系粒子が含まれている水系サスペンションに超音波法を利用した微粒子回収法（洗浄法）が提案された。A protocol for the detachment of submicron particulates deposited on flat substrate and their collection in aqueous samples is proposed based on an ultrasonic method.
第38回空気清浄とコンタミネーションコントロール研究大会 2021/4/13-14 Japan Air Cleaning Association (JACA)
The 38th Annual Technical Meeting on Air Cleaning and Contamination Control 第38回空気清浄とコンタミネーションコントロール研究大会（2021年4月13日・14日） プログラム | 公益社団法人 日本空気清浄協会 （JACA） (jaca-1963.or.jp) Prof. Lenggoro will be acted as a session chair and others. 座長など Venue: Waseda University, Tokyo.
Text: “Interdisciplinary Research for the Education of the Next Generation” (Invited by Indonesian Ministry of Education & Culture)
Global challenges are always complex, so placing an excessive value on a competition will lead the world in the wrong direction. For the long term good, the winner will be meaningless. Understanding and caring about each other’s history is the key to collaborating with other countries.
Talk/講演: 分析用と機能化用ツールとしてのナノ粒子 Nanoparticles as tools for analysis & functionalization
Plenary (基調講演), 1st Functional Nanopowder International Conference (Nov. 2020)
Part of the talk was broadcasted in Indonesian language on 20 Oct. 2020 via Youtube. Organized by International Indonesian Scholars Association (I-4)
エアロゾル学会・高橋幹二賞 TAKAHASHI AWARD (Aerosol Sci. & Tech., Japan) “Deposition of submicron aerosols by a closed-loop flow system” 閉ループ式エアロゾル流によるサブミクロン粒子の沈着
本論文で示された知見により、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。The 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).
Online日本エアロゾル科学技術研究討論会 Symposium on Aerosol (27-28 Aug.)
日本エアロゾル学会第37回エアロゾル科学・技術研究討論会 (jaast.jp) Annual Meeting (Conference) of Japan Association of Aerosol Science and Technology. For the first time, JAAST made the meeting in online. 新型コロナウイルスの感染拡大に伴い，全国規模の「緊急事態宣言」が発出されました．宣言解除後も予断を許さない状況であり，「感染拡大の防止」および「安全な討論会開催」の観点から，本年度は現地開催を取りやめ，「オンライン開催」へ変更することを決定いたしました．In response to the spread of the new coronavirus, a nationwide “state of emergency” has been declared. Even after the declaration has been lifted, the situation is still unpredictable, and from the…
数μmのエアロゾル液滴が親水性表面にどのように沈着するのか？Micrometer-sized droplet aerosols on to a hydrophilic surface. 応用例：エアロゾル吸入器など
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.
Alumni卒業生の論文が米国化学会ES&T Letters最優秀論文賞 ACS Environ. Sci. Tech. Lett. BEST PAPER AWARD
Gen氏は当研究室で卒論・修論・博士論文をしていました。東北大学で研究員・教員を務めたあとに香港の大学に異動しました。Mr. Gen did his thesis, master’s thesis and doctoral dissertation in our laboratory. He was a researcher/lecturer at Tohoku Univ. before moving to City University of Hong Kong.
口から発せられた微粒子と換気 Particles from 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!」
マスク装着（エアロゾル学会）Mask-wearing
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.
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.
卒業生に日本エアロゾル学会奨励賞 (Alumni) Dr. Naoya Hama: Young Researcher Award (Association of Aerosol Science & Tech.)
受賞対象研究：さまざまな粒子発生源に対するエアロゾル（気中）計測装置の適用性に関する研究、および企業会員と学会の連携強化に対する貢献。Research on the applicability of aerosol (gas-phase) measurement devices to a variety of particle sources and contributions to strengthening collaboration between company members and academic societies.
低コストで携帯型（気中浮遊）粒子計測器 Low-cost, portable, aerosol/PM 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。
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..
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 the charge of the particles in the liquid and the charge during aerosolization.
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。
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？
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: a 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。
作物（小松菜）に水溶性微粒子を長期的に散布した後は？ 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…
葉の構造はエアロゾルの付着を防ぐ？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。
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評価したEvaluating the charging state of particles collected from the air using Kelvin-Force 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
ココナツ殻由来素材の表面に微粒子を集積 Fine particles on bio-composite surface.
Other “intro” of papers from our lab >> /tag/paper/ HIGHLIGHTS:* Physical treatment on the biocomposite increases the surface roughness.* Single bond COOH network on the treated biocomposite promotes the particle deposition.* The network reduces the particles repulsion during the deposition process. # Bio-composite（バイオコンポジット）is a composite material formed by a matrix (resin) and a reinforcement of…
微粒子の散布で表面の「分子層」を可視化 Visualization of “molecular layer” by spraying 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
