期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 82, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3581226
关键词
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资金
- Israeli Science Foundation [213/09]
- United States-Israel Binational Science Foundation [2009401]
- European Research Council (ERC) [201665]
- Russell Berrie Nanotechnology Institute at the Technion
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [2009401] Funding Source: National Science Foundation
A pulsed electron spin resonance (ESR) microimaging system operating at the Q-band frequency range is presented. The system includes a pulsed ESR spectrometer, gradient drivers, and a unique high-sensitivity imaging probe. The pulsed gradient drivers are capable of producing peak currents ranging from similar to 9 A for short 150 ns pulses up to more than 94 A for long 1400 ns gradient pulses. Under optimal conditions, the imaging probe provides spin sensitivity of similar to 1.6 x 10(8) spins/root Hz or similar to 2.7 x 10(6) spins for 1 h of acquisition. This combination of high gradients and high spin sensitivity enables the acquisition of ESR images with a resolution down to similar to 440 nm for a high spin concentration solid sample (similar to 10(8) spins/mu m(3)) and similar to 6.7 mu m for a low spin concentration liquid sample (similar to 6 x 10(5) spins/mu m(3)). Potential applications of this system range from the imaging of point defects in crystals and semiconductors to measurements of oxygen concentration in biological samples. (C) 2011 American Institute of Physics. [doi:10.1063/1.3581226]
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