Electron Spin Resonance Measurement with Microinductor on Chip | Zendy

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Electron Spin Resonance Measurement with Microinductor on Chip

Author(s) -

Akio Kitagawa

Publication year - 2011

Publication title -

journal of sensors

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.399

H-Index - 43

eISSN - 1687-7268

pISSN - 1687-725X

DOI - 10.1155/2011/813636

Subject(s) - electron paramagnetic resonance , spectrometer , materials science , analytical chemistry (journal) , chip , spins , spectroscopy , radical , signal (programming language) , cmos , sweep frequency response analysis , dielectric spectroscopy , chemistry , optoelectronics , nuclear magnetic resonance , electrical engineering , electrode , optics , physics , organic chemistry , chromatography , condensed matter physics , quantum mechanics , engineering , computer science , electrochemistry , programming language

The detection of radicals on a chip is demonstrated. The proposed method is based on electron spin resonance (ESR) spectroscopy and the measurement of high-frequency impedance of the microinductor fabricated on the chip. The measurement was by using a frequency sweep of approximately 100MHz. The ESR spectra of di(phenyl)-(2,4,6-trinitrophenyl)iminoazanium (DPPH) dropped on the microinductor which is fabricated with CMOS 350-nm technology were observed at room temperature. The volume of the DPPH ethanol solution was 2L, and the number of spins on the micro-inductor was estimated at about 10 1 4. The sensitivity is not higher than that of the standard ESR spectrometers. However, the result indicates the feasibility of a near field radical sensor in which the microinductor as a probe head and ESR signal processing circuit are integrated. Copyright © 2011 Akio Kitagawa

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