2013 Fiscal Year Final Research Report
Microchemistry Based on Single Colloidal and Aerosol Particles
| Project/Area Number |
23245015
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Analytical chemistry
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| Research Institution | Hokkaido University |
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Principal Investigator |
KITAMURA Noboru 北海道大学, 理学(系)研究科(研究院), 教授 (50134838)
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| Co-Investigator(Kenkyū-buntansha) |
ISHIZAKA Shoji 広島大学, 大学院理学研究科, 准教授 (80311520)
SAKUDA Eri 北海道大学, 大学院理学研究院, 助教 (80554378)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | レーザー捕捉 / 単一微粒子 / コロイド / エアロゾル / マイクロ分析化学 |
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| Research Abstract |
Novel techniques based on laser trapping - microspectroscopy on single micrometer-sized colloidal particles in solution as well as single aerosol water droplets in air have been developed. In particular, we have developed temperature- and moisture-controlled laser trapping of single aerosol water droplets in air. We also confirmed experimentally photoinduced aerosol droplet formation in air and its mechanistic aspects were elucidated. Furthermore, we succeeeded in determining the sizes of single aerosol droplets in a nanometer level based on whipering gallery mode resonances of Raman scattering light in single aerosol droplets. We also showed that the intraparticle diffusion of a cation dye in single cation-exchange resin microparticles was determined by the Donnan electric membrane potential generated at the resin/water interface, which was the first observation for single ion-exchange microparticles.
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