Laser spectroscopy and photochemistry in micrometre small volumes

Hiroshi Masuhara*, N. Kitamura, H. Misawa, K. Sasaki, M. Koshioka

*Corresponding author for this work

Research output: Contribution to journalArticle

11 Scopus citations


The importance of micrometre dimensions in photochemistry is considered, and a systematic study on laser spectroscopy and photochemistry in small micrometre volumes is reported. To measure chemical reactions in the small volumes, submicrometre space- and picosecond time-resolved fluorescence and transient absorption spectroscopy was developed by employing a confocal laser scanning microscope. Laser-trapping phenomena were used for choosing small (micrometre-sized) materials as well as reagents, transferring them to a certain position with micrometre resolution and inducing chemical reactions. Combined with spectroscopic analysis, the laser-trapping technique was developed as a laser manipulation-spectroscopy-reaction method. Utilizing these methods, characteristic micrometre-sized effects were confirmed in the excimer dynamics in microdroplets and photoresponse of gels. Some small (micrometre-sized) reaction fields, which are crucial for conducting chemical reactions, were created by microfabrication techniques. Summarizing our trials, our goal to create an integrated chemical system named microphotoconversion is presented.

Original languageEnglish
Pages (from-to)235-247
Number of pages13
JournalJournal of Photochemistry and Photobiology, A: Chemistry
Issue number1-2
StatePublished - 30 Apr 1992

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