PAPER: Thermal convections break the mist: A method for synthesis of particle layer. 熱対流がミストを微細化。微粒子層の新しい合成法

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。 Continue reading PAPER: Thermal convections break the mist: A method for synthesis of particle layer. 熱対流がミストを微細化。微粒子層の新しい合成法

PAPER: Leaf waxes to prevent “incoming” particles. 大気中微粒子の付着を防止する葉の仕組み

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


Journal of Plant Research (13 June 2016) DOI 10.1007/s10265-016-0839-7
plants-Fuchucampus“Effect of epicuticular wax crystals on the localization of artificially deposited sub-micron carbon-based aerosols on needles of Cryptomeria japonica (Sugi)”

電界放出型走査電子顕微鏡(FE-SEM)によるスギ(代表的な針葉樹種)の葉表面に人工的に散布されたサブミクロンサイズの炭素系粒子の局在を調べました。気孔の機能を保持するために、密に分布されたエピクチクラワックス結晶は、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。from-nakaba-2016-JPlantRes

Elucidation of the mechanism of adsorption of particles suspended in the gas-phase (aerosol) to the outer surfaces of leaves provides useful information for understanding the mechanisms of the effect of aerosol particles on the growth and physiological functions of trees. We examined the localization of artificially deposited sub-micron-sized carbon-based particles on the surfaces of needles of Cryptomeria japonica, a typical Japanese coniferous tree species, by field-emission scanning electron microscopy (FE-SEM).  Our results suggest that epicuticular wax crystals affect distribution of particles on needles. Therefore, densely distributed epicuticular wax crystals might prevent the deposition of sub-micron particles on the surfaces of needles to retain the function of stomata.


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Continue reading “PAPER: Leaf waxes to prevent “incoming” particles. 大気中微粒子の付着を防止する葉の仕組み”

PAPER: Charge of particles (PM2.5) collected in filter, 捕集された大気粒子の帯電状態

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


Preliminary study on the measurement of the electrostatic charging state of PM2.5 collected on filter media, 
実環境中のPM2.5(粒子状物質)をフィルター状で捕集したあとに帯電状態を調べた。「帯電」は、PMによる健康への影響を理解するために重要な情報。捕集されたPM2.5は75~87%が負に帯電されたことがわかった。

共同研究の成果 Collaborated between:
* Keio Univ: Okuda (Prof.), and graduate students (Yoshida, Gunji, Okahisa) and
* Tokyo Univ. of Agr. & Tech.: Kusdianto (Doctoral-student), Gen (Doctoral-student), Sato (Master-student), Lenggoro (Prof.)

keio-collected-tuat-measured
Schematic of experiments

Asian Journal of Atmospheric Environment (2015) 9(2):105-113 … more…
Continue reading “PAPER: Charge of particles (PM2.5) collected in filter, 捕集された大気粒子の帯電状態”

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 Continue reading Student presented “Pump-less spraying”: Symposium of Institute for Liquid Atomization & Spray Systems, 微粒化シンポジウム

PAPER: Insertion of (water-phase) particles into sub-100 nm holes. 浮遊粒子を100nm以下の穴に固定化:サンドイッチ型複合材料

Immobilization of colloidal particles into sub-100 nm porous structures by electrophoretic methods in aqueous media Kusdianto, Sasaki, Naim, Lenggoro, Colloids Surfaces A: 10.1016/j.colsurfa.2014.06.042 【新規性】新開発の「パルス型電気泳動法(Pulse-type Electrophoretic Deposition/EPD)」および従来EPD法を用いて、水中に浮遊する粒子を100nm以下の穴(ポーラス構造)に挿入・固定。世界初です。 【耐久性】ポーラス構造内に固体化された粒子に対して、超音波エネルギーをかけて、粒子の脱離を試みましたが、穴に粒子がちゃんと残こります。 【展開】酵素や触媒材料の固定化技術への応用 Full article RELATED TECHNOLOGY: 関連技術・成果 Submicrometer- and nanometer-sized particles 2D structure from colloids, 電界による粒子の2次元構造化:凝集状態の制御 Particles with high-crystallinity by-electric field in liquid-phase, 電界による高結晶粒子の構造化:クラックが少ない構造体も可能 Continue reading PAPER: Insertion of (water-phase) particles into sub-100 nm holes. 浮遊粒子を100nm以下の穴に固定化:サンドイッチ型複合材料

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 ***

PAPER: Formation of nanometer sized enzyme. 酵素のナノ粒子化

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 JOURNAL: Enzyme and Microbial Technology HIGHLIGHTS: •Nanometer-sized CGTase enzyme particles. … Continue reading PAPER: Formation of nanometer sized enzyme. 酵素のナノ粒子化

PAPER: Deposition of gas-phase particles on both sides. 薄板の裏側まで微粒子が沈着

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 Open access. サブミクロンの帯電粒子を気中に浮遊させて、目的の平板の両面に粒子群が沈着しているメカニズムを説明した。 【展開】植物の葉に沈着する微粒子の挙動(農薬等の散布法)の理解 【展開】自動車等の静電塗装の分野 Continue reading PAPER: Deposition of gas-phase particles on both sides. 薄板の裏側まで微粒子が沈着

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 derived from colloidal aerosol droplets on a surface with different … Continue reading PAPER: with a project funded by MEXT Kakenhi (2011-2014)科研費の成果

Iinoya Award to a student (30th. Symposium on Aerosol). 院生が学会賞受賞

Doctoral student: MASAO GEN got the 2013 IINOYA AWARD during 30th SYMPOSIUM ON AEROSOL SCIENCE & TECHNOLOGY (held in Kyoto Univ.) (Supplementary prize = cash prize of 100,000 Yen) “Development of a portable sensor system based on aerosol particles to detect pesticide residues” エアロゾル粒子センサーを用いた携帯型残留農薬検出システムの開発 (東京農工大学・大学院博士後期課程)玄 大雄 The award selection was based from a “special session” (5 min. presentation and more than 10 min. Q/A). This … Continue reading Iinoya Award to a student (30th. Symposium on Aerosol). 院生が学会賞受賞

PAPER. Measuring carbon particles on leaf surface, 葉面上の炭素系粒子の計測手法

Journal: Asian Journal of Atmospheric Environment (2012) Optical method for measuring deposition amount of black carbon particles on foliar surface Authors: M. Yamaguchi, K. Takeda, Y. Otani, N. Murao, H. Sase, I. W. Lenggoro, K. Yazaki, K. Noguchi, A. Ishida, T. Izuta Full article (PDF): http://asianjae.org/browse_sub.html?class_no2=30 研究機関: 東京農工大学(農), 北海道大学(工), 日本環境衛生センター/アジア大気汚染研究センター, 森林総合研究所, 東京農工大学(工), 京都大学生態学研究センター Affiliations 1: Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo … Continue reading PAPER. Measuring carbon particles on leaf surface, 葉面上の炭素系粒子の計測手法

Presented in Asian Particle Technology Symposium 2012, Singapore

Lenggoro and Gen (doctoral student) presented two papers in 5th Asian Particle Technology Symposium, Singapore 3-5 July 2012 Proceedings in USB-memory, ISBN: 978-981-07-2518-1 172: Oral: Assembly of Gas-Phase Nanoparticles on a Structural Substrate for Spectroscopic-Based Sensor to Detect a Pesticide Masao Gen*, Hideo Kakuta, Yoshihito Kamimoto, Wuled Lenggoro 銀ナノ粒子のエアロゾル集積によりセンサーを作製し、ラマン分光法との組み合わせを駆使して、現場(農場)における残留農薬の計測を試みた。(博士課程後期の玄にとっては初めての国際会議で口頭発表でした) 122: Oral: A Chamber System with Aerosol Generators for Exposures of Plants to Submicrometer-Sized Particles Wuled Lenggoro*, Masao … Continue reading Presented in Asian Particle Technology Symposium 2012, Singapore