Tag Archives: Aerosols

PAPER: Spraying water-soluble particles to komatsuna leaves. 小松菜に水溶性微粒子を散布したら・・

Short Introductions of /our papers/


Free-access (until Dec. 1, 2017): elsevier.com

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 solution to be absorbed into the leaf. 葉表面に堆積した粒子の量は時間とともに減少した。サブミクロン硫酸アンモニウム(AS)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。

Continue reading PAPER: Spraying water-soluble particles to komatsuna leaves. 小松菜に水溶性微粒子を散布したら・・

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

 

 

 

A book on “air pollution” matter. PM2.5の科学(畠山史郎、野口恒, 2016)

OLYMPUS DIGITAL CAMERA
A book on PM2.5 (by S. Hatakeyama and H. Noguchi) 2016
OLYMPUS DIGITAL CAMERA
The last page

Wuled Lenggoro contributed on making the “first-connect” between two authors (Shiro Hatakeyama, a well-known professor of PM2.5 and Hisashi Noguchi, a Journalist). Published by Nikkan Kogyo Shinbun (2016)..

著者:畠山史郎(農工大教授)、野口恒(ジャーナリスト)

大気中に浮遊する粒子状物質(Particulate Matter)のうち、粒径が2.5 µm以下のものを指します。

Amazon website::: Nikkan Bookstore :::

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

Other “intro” of papers from our lab >> /tag/paper/


okuda-gunji2015

A collaborated study with Dr. Okuda group at Keio University. エアロゾル研究 Vol. 30 (2015) No. 3 p. 190-197 (Journal of Aerosol Research) doi.org/ | ResearchGate

Kelvin Probe Force Microscopyを用いたエアロゾル個別粒子の帯電状態の測定
Measurement of the Electrostatic Charging State of Individual Particles in Ambient Aerosol Using Kelvin Probe Force Microscopy (Okuda, Gunji, Lenggoro)

 

呼吸により人体に入る微粒子に関する課題において、微粒子の帯電状態が注目されるようになった。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新たな手法を考案した。大気環境中から捕集された微粒子の表面電位を測定し、その微粒子の電荷素量が4以上であることが明らかになった。今後は化学組成と帯電状態との関係を検討していく必要も考えられる。

2016-award-okuda-gunji-lenggoro2
An award from JAAST (Industry consortium) related to this study (Okuda/Gunji/Lenggoro)

Recently, 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 using Kelvin probe force microscopy (KPFM). For the ambient aerosol particles, the surface potential ranged from-56.6 mV to+156.7 mV, indicating that the number of elementary charges of ambient aerosol particles analyzed in this study was more than 4.

Recent journal articles from our group.研究室から発表した(最近の)論文
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BEST PAPER AWARD at International Conference (PURE 2015, Malaysia)最優秀論文賞

OPE

11 Nov. 2015. BEST PAPER AWARD, 2nd International Conference on Purity, Utility Reaction and Environmental Research (PURE 2015), Kuala Lumpur.12265664_1658963404361849_7010463302459411147_o
“Development of a battery-driven passive sampling system for electrostatically trapping atmospheric particles”
(M. P. Khairunnisa, F. Faizal, H. Fukushima, M. Gen, P. Widiatmoko, I. W. Lenggoro*)

award201511-nisa-malaysiaaward201511-nisa-malaysia-paper

(乾電池を用いた高電圧変換器を駆使し、携帯性に優れた、大気中微粒子捕集器の開発):各地のPM2.5またはPM1.0の解析に役にたつ

Full paper : Journal of Purity, Utility Reaction and Environment, 5(2), 43-50 (2016.Apr)

Open Access:

Nisa-award-JAASTYoung2015

The related study was also honored as BEST POSTER AWARD during 12th Forum of Young Association of JAAST (Japan Association of Aerosol Science and Technology) 第12回エアロゾル若手フォーラム 2015/10/14 (Keio Univ.)

“A battery- and electrostatic-driven system for sampling suspended particles on a substrate”
(M. P. Khairunnisa, Ferry Faizal, Hisako Fukushima, Masao Gen*, Pramujo Widiatmoko**, I. Wuled Lenggoro)
Tokyo University of Agriculture and Technology; *Tohoku University; **Institut Teknologi Bandung.

研究室のこれまで:受賞歴.AWARD

PAPER: Between Charged Aerosol Particles & Substrate’s Hydrophilicity.(発見)正帯電した気中浮遊粒子が親水性が高い表面に付きやすい現象

pdf
Area-selective deposition of charged particles derived from colloidal aerosol droplets on a surface with different hydrophilic levels...J. Aerosol Science. (a work by Kusdianto (Doctoral student, now with ITS, Indonesia), Gen (Doctoral student, joined Tohoku Univ. then City Univ. Hong Kong), and Lenggoro.

Highlights
* Charged aerosol particles were derived from spraying colloidal droplets.
* Substrate with different ‘levels’ of hydrophilicity was used.
* Positively charged aerosol particles tended to approach the ‘more hydrophilic’ area.

Go to hydropilic surface

異なる親水性度をもつ基板(表面)に対して、気相中に浮遊させた帯電微粒子の挙動を調べました。
【新規性】正に帯電された浮遊微粒子がより親水性度が高い表面に沈着(付着)する傾向にあることがわかりました。
【応用展開1】材料のパターン化技術のヒント
【応用展開2】植物表面における大気中浮遊粒子の沈着の研究のヒント

Patterning on ‘more hydrophilic’ area
pdf
>>> Some journal papers from our group.

Short-link of this site:
http://wp.me/p10HOa-1Qs

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)

Go to hydropilic surface

*** PUBLICATIONS ***