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Proceedings Paper

Organic molecular sensing by single metal porphyrin nanoparticles
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Paper Abstract

We demonstrate preparations of zinc porphyrin nanoparticles by reprecipitation method and their spectroscopic analysis by dark-field light scattering microspectroscopy. The size distribution of the prepared nanoparticles was 80-150 nm. By using dark-field illumination the nanoparticles could be observed as bright points in dark background and could be examined by their Rayleigh scattering spectra at single particle level. The spectra differed from particle to particle, which would be ascribed to their size and crystalline phase difference. Thus we have performed this single particle spectroscopic technique to remove the ambiguity about the spectroscopic information owing to distributions of particles and to improve the space selectivility. In addition, we have successfully demonstrated the detection of amine molecules in water at single particle level. These results indicate that the detection technique using the single porphyrin nanoparticles can be applied to chemical and biological sensors with nanometer scale.

Paper Details

Date Published: 22 February 2008
PDF: 7 pages
Proc. SPIE 6865, Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications V, 68650I (22 February 2008); doi: 10.1117/12.762445
Show Author Affiliations
Takayuki Uwada, Hamano Life Science Research Foundation (Japan)
Yoichiroh Hosokawa, Hamano Life Science Research Foundation (Japan)
Osaka Univ. (Japan)
CREST, Japan Science and Technology Agency (Japan)
Noriko Takizawa, Hamano Life Science Research Foundation (Japan)
Kazunori Okano, Hamano Life Science Research Foundation (Japan)
Osaka Univ. (Japan)
Hiroshi Masuhara, Hamano Life Science Research Foundation (Japan)
Osaka Univ. (Japan)
CREST, Japan Science and Technology Agency (Japan)


Published in SPIE Proceedings Vol. 6865:
Nanoscale Imaging, Sensing, and Actuation for Biomedical Applications V
Alexander N. Cartwright; Dan V. Nicolau, Editor(s)

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