Analytical Sciences

Abstract − Analytical Sciences, 26(12), 1211 (2010).

Nano-Gap Magnetophoresis with Raman Spectroscopic Detection
Makoto KAWANO,* Jennifer L. YOUNG,* and Hitoshi WATARAI*,**
*Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
**Institute for NanoScience Design, Osaka University, Toyonaka, Osaka 560-8531, Japan
As a tool to determine the magnetic susceptibility of a nano/microparticle in a liquid, a nano-gap magnetophoresis device was fabricated using tilted flat glass plates and a permanent magnet. The nano-gap device was not only used to determine the size of particles, but also directly provided measurements of Raman spectra of fractionally trapped particles in the nano-gap device. The performance of the new hyphenated method was demonstrated by an analysis of suspended particle matter in traffic air.