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.
Category: Research
著書 Nanoparticles Carrying Biological Molecules (Book Chapter)
The conjugation of nanoparticles and biomolecules has found applications in bioimaging, biocatalysis, drug delivery, and biosensors. ナノ粒子と生体分子の「共役」は、バイオイメージング、生体触媒、薬物送達、バイオセンサーなどの分野で応用が見出されている。
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!」
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.
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.
Consistent particle deposition & localization found in leaf structures. 様々な葉の構造で一貫した粒子の沈着と局在
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.
A workshop: Australia (Monash Univ.) and Japan (TUAT)
TUAT welcomes a group from Monash Univeristy (led by Professor Aibing Yu, Vice Chancellor’s Professorial Fellow, Pro Vice-Chancellor and President – Suzhou) Speakers: “Modelling of reacting flows and industry applications: some examples” Yansong Shen (University of New South Wales) “Modelling and Simulation of Packing and Flow of Ellipsoidal Particles”, Zongyan Zhou (Monash University) “DEM-based models for flow,…
Electrode design: A solution for producing magnetite nanoparticles. 電極設計の威力。磁鉄鉱粒子を製造する方法。
◆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).
A device for real-time measurement of particulate matter PM10.粒子状物質をリアルタイムに測定する装置 Arduino & Dust 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1000 μg/m3 の濃度も測定可。
科学者・技術者を目指す高校生Program for high-school student by JST, GIYSE. 当研究室も受け入れた
2018-2019: Mid-term Report (at JST website): h30tokyonoukou.pdf (jst.go.jp) Lenggoro lab was joining a new program for high-school student (sponsored by the Japanese government/JST) 東京農工大学では、将来グローバルに活躍する科学者、技術者を目指す高校生を対象に、大学の研究、教育内容を先取りして経験できるプログラムを用意しました。それが「GIYSEプログラム」です。Global Innovation program for Young Scientists and Engineers /~giyse/ K. Sano (1st, 2nd grade student, Tokyo Metropolitan Tachikawa High School 東京都立立川高等学校) is joining GIYSE program (2018-2019). His topic is about the collection…
教員あたりの学術論文数が国内2位(農工大)TUAT: Japan’s second “most-productive” university in terms of “Number of papers per academic-staff”.
Tokyo University of Agriculture and Technology (TUAT) is a university with many “high-research-producers”. The university has about 400 academic-staffs. Japan’s second “most-productive” university in terms of “Number of papers per academic-staff” UK-based QS announced the QS Asian University ranking 2018 (Oct. 2017), and TUAT ranked as the top 1% of universities in Asia. In particular,…
A technology for forming submicron particle layers on substrates by aerosol flow systems.エアロゾル流システムで基板上にサブミクロン粒子層を形成する技術
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..
Surface charge of colloidal particles and electrosprayed droplets interact. コロイド粒子の表面電荷と静電噴霧した液滴の電荷との相互作用
Interaction between surface charge of colloidal particles and their charged aerosol droplets is investigated for the first time. 液中のナノ粒子の表面電荷と気相中操作により懸濁液滴の荷電(電荷)の間の相互作用。世界で初めての研究。
日本地球惑星科学連合会 Invited talk “水性媒体中での電気泳動法による100 nm以下の多孔質構造体へのコロイドの輸送と固定化” Japan Geoscience Union:
By a recommendation of Prof. Hirotaka Saito (Soil Physics, Institute of Agriculture, TUAT) Wuled Lenggoro was invited for a talk in JpGU (Japan Geoscience Union 日本地球惑星科学連合会) Meeting 2018 “Transport and immobilization of colloids into sub-100 nm porous structures by electrophoretic methods in aqueous media” (水性媒体中での電気泳動法による100 nm以下の多孔質構造体へのコロイドの輸送と固定化) This study was performed by TUAT students: K. Kusdianto (Dr. Eng.,…
How to make hydrophilic or hydrophobic particle layers from candle burning? ろうそく燃焼から親水性、疎水性粒子層を作るには?
We discovered methods to form hydrophilic or hydrophobic layers. 親水性または疎水性を有する粒子膜の作製法を開発。5000年前に開発された「墨」技術と同じ?
卒論生が発表:化学工学会学生大会(第18回, 19回, 20回)Undergrad. students’ presentations
水サンプル中のppbレベル不溶性微粒子の計測に関する実験的検討 (2016, Shizuoka)
大気中粒子用パッシブ型捕集器の開発 (2016, Shizuoka)
噴霧乾燥粉末の水中再分散性に関する実験的検討 (2017, Tokyo)
太陽光蒸留器の蒸発効率に及ぼす炭素系微粒子の影響 (2018, Tokyo)
Doctoral Thesis 博士公聴会 (Feb. 2018) “Particle Layers” エアロゾル粒子の集積
MICROSTRUCTURED-PARTICLE LAYERS FROM AEROSOLS. エアロゾル集積による微細構造粒子層の形成
Destruction of aerosols by thermal convection from a plate: A novel synthesis method. 高温板からの熱対流によるエアロゾルの破壊。新しい材料合成法
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。Discovery of a low-energy route to layer of nanometer-sized particles with high crystallinity.
Crowdfunding: Aerosol Research Using Mt. Fuji. 富士山頂の測候所
A “message” from Waseda University (Profs. Okochi and Shimada) クラウドファンディング 富士山頂の測候所から、大気汚染物質の広がりの謎にせまる! https://academist-cf.com/projects/?id=54
After spraying of water-soluble particles on a crop (komatsuna). 小松菜に水溶性微粒子を散布していた後は?
Ammonium sulfate particles deposited on the leaf deliquesced, allowing ions such as SO42− in the solution to be absorbed into the leaf. サブミクロン硫酸アンモニウム粒子が葉表面に堆積し、脱離溶液中のSO42−などのイオンが葉に吸収される可能性が高い。
Doctoral Presentation (Aug. 2017) ” Enzyme Immobilization” 酵素の固定化(博士公聴会)
DEPOSITION AND IMMOBILIZATION OF ENZYME BY MEANS OF ELECTROHYDRODYNAMIC ATOMIZATION (電気流体力学効果を用いた酵素の固定化)
大学院生(博士課程)が台湾で発表 Graduate student at 2017 Asian Particle Technology Symposium (Taiwan).
Doctoral student presented in Asian Particle Technology Symposium 2017 (Taiwan). 博士学生が台湾で発表した
大学院生が韓国で発表。A graduate student at Asian Aerosol Conference (Korea, July 2017)
A doctoral student (Ferry Faizal) presented his study at 10th Asian Aerosol Conference (AAC2017), which was held in Jeju, Korea, 2 to 6 July 2017. Assembly of particles from candle burning Attracting 541 delegates, speakers, and sponsors from 19 countries around the world. Photo: Conference official website
A doctoral student presented in Asian Aerosol Conference 2017 (Jeju, Korea)博士学生が韓国で発表した。
Presenter: F. Faizal (Doctoral student), Co-author: S. Yokote (Master-student), M. P. Khairunnisa (former doctoral student, now with Ministry of Higher Education, Malaysia), W. Lenggoro “Direct- and Electrospray-Depositions of Particles Derived from Burning Candles” DATE: JULY 2 – 6, 2017, VENUE: ICC JEJU, JEJU, KOREA * Presentation by student >> LIST