DOI: 10.1063/1.1942533. A quasioptical transient electron spin resonance spectrometer operating at 120 and 240 GHz

A quasioptical transient electron spin resonance spectrometer operating at 120 and 240 GHz

10.1063/1.1942533

Crossref journal-article

AIP Publishing

Review of Scientific Instruments (317)

Abstract

A new multifrequency quasioptical electron paramagnetic resonance (EPR) spectrometer is described. The superheterodyne design with Schottky diode mixer/detectors enables fast detection with subnanosecond time resolution. Optical access makes it suitable for transient EPR (TR-EPR) at 120 and 240 GHz. These high frequencies allow for an accurate determination of small g-tensor anisotropies as are encountered in excited triplet states of organic molecules like porphyrins and fullerenes. The measured concentration sensitivity for continuous-wave (cw) EPR at 240 GHz and at room temperature without cavity is 1013spins∕cm3 (15 nM) for a 1 mT linewidth and a 1 Hz bandwidth. With a Fabry-Perot cavity and a sample volume of 30 nl, the sensitivity at 240 GHz corresponds to ≈3×109 spins for a 1 mT linewidth. The spectrometer’s performance is illustrated with applications of transient EPR of excited triplet states of organic molecules, as well as cw EPR of nitroxide reference systems and a thin film of a colossal magnetoresistance material.

Bibliography

van Tol, J., Brunel, L.-C., & Wylde, R. J. (2005). A quasioptical transient electron spin resonance spectrometer operating at 120 and 240 GHz. Review of Scientific Instruments, 76(7).

Authors 3

J. van Tol (first)
L.-C. Brunel (additional)
R. J. Wylde (additional)

References 20 Referenced 155

10.1007/978-1-4757-4379-1 / Very High Frequency (VHF) ESR/EPR by Grinberg (2004)
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10.1006/jmre.1999.1798 / J. Magn. Reson. (1999)
10.1007/BF03161933 / Appl. Magn. Reson. (1999)
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Dates

Type	When
Created	20 years, 2 months ago (June 21, 2005, 6:23 p.m.)
Deposited	2 years ago (Aug. 1, 2023, 6:01 a.m.)
Indexed	3 days, 5 hours ago (Aug. 23, 2025, 9:17 p.m.)
Issued	20 years, 2 months ago (June 22, 2005)
Published	20 years, 2 months ago (June 22, 2005)
Published Online	20 years, 2 months ago (June 22, 2005)
Published Print	20 years, 1 month ago (July 1, 2005)

Funders 0

None

BibTeX

@article{van_Tol_2005, title={A quasioptical transient electron spin resonance spectrometer operating at 120 and 240 GHz}, volume={76}, ISSN={1089-7623}, url={http://dx.doi.org/10.1063/1.1942533}, DOI={10.1063/1.1942533}, number={7}, journal={Review of Scientific Instruments}, publisher={AIP Publishing}, author={van Tol, J. and Brunel, L.-C. and Wylde, R. J.}, year={2005}, month=jun }

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