Tag Archives: Analytical method

PAPER: Dispersing particles then Raman spectroscopy: New concept for surface analysis. 新しい表面分析法:ラマン分光用の粒子集積

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


* Main researcher: Masao Gen,  a doctoral student: 2011/10-2014/6. Joined Tohoku University (2014-2015, Researcher/Assistant professor), then City Univ. of Hong Kong. He applied this new method (Electrospray-Surface Enhanced Raman Spectroscopy (ES-SERS) for probing particulate matter (PM) collected as “air pollutant” Atmos. Chem. Phys. (2017)

pdf

M. Gen & I. W. Lenggoro, RSC Adv. (2015)
Gen & Lenggoro, RSC Adv. (2015)

Aerosol nanoparticle sensor system for probing a dip-coated layer of organic molecules, at sub-100 nm resolution .気中分散微粒子を用いたSERS法によって、表面上の分子「パターン」に対して直接「検査」可能な技術

関連技術 Related topics: 残留農薬の検出に向けて, Detect a pesticide in the field.

There’s more…さらに詳細に

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
2: Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo
3: Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido
4: Asia Center for Air Pollution Research, Niigata
5: Institute of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo
6: Forestry and Forest Products Research Institute, Tsukuba, Ibaraki
7: Shikoku Research Center, Forestry and Forest Products Research Institute, Kochi
8: Center for Ecological Research, Kyoto University, Otsu, Shiga
9: Institute of Agriculture, Tokyo University of Agriculture and Technology, Fuchu, Tokyo

To perform quick measurements of black carbon (BC) particles deposited on foliar surfaces of forest tree species, we investigated an optical method for measuring the amount of BC extracted from foliar surfaces and collected on quartz fiber filters. The seedlings of Fagus crenata, Castanopsis sieboldii, Larix kaempferi and Cryptomeria japonica were exposed to submicron BC particles for one growing season (June to December). At the end of the growing season, the leaves or needles of the seedlings were harvested and washed with deionized water followed by washing with chloroform to extract the BC particles deposited on the foliar surfaces. The extracted BC particles were collected on a quartz fiber filter. The absorption spectrum of the filters was measured by spectrophotometer with an integrating sphere. To obtain the relationship between the absorbance of the filter and the amount of BC particles on the filter, the amount of BC particles on the filter was determined as that of elemental carbon (EC) measured by a thermal optical method. At wavelengths below 450 nm, the absorption spectrum of the filter showed absorption by biological substances, such as epicuticular wax, resulting in the low coefficient of determination (R2) in the relationship between the amount of EC on the filter (MEC, μg C cm−2 filter area) and the absorbance of the filter. The intercept of the regression line between MEC and the absorbance of the filter at 580 nm (A580) was closest to 0. There was a significant linear relationship between the A580 and MEC (R2 = 0.917)

files-folderRecent topics from published journal articles: 最近の論文概要

PAPER: Nano-structure for on-site detection of pesticide. 残留農薬の現場検査に向けたナノ構造化

A colloidal route to detection of organic molecules based on surface-enhanced Raman spectroscopy (SERS) using nanostructured substrate derived from aerosols

>> Jpn. J. Applied Physics, 2011 (Abstract, Full Text PDF)

Collaborated works with:
Plant Ecochemicals Research Center (Eniwa, Hokkaido)
and
Kanagawa Industrial Technology Center (Ebina, Kanagawa)

ナノ粒子の構造化による基板(チップ)形成を行い、ラマン散乱分光を用いた微量な(モデル:農薬)成分の検出精度を向上させた。

著者:
玄大雄(東京農工大学・修士課程)、
角田英男((社)植物情報物質研究センター(北海道))、
上元好仁(神奈川県産業技術センター)、
ウレット・レンゴロ(東京農工大学)

files-folderRecent topics from published journal articles: 最近の論文概要