NMR MAS electret spin rate detection

Details NMR MAS electret spin rate detection NMR MAS electret spin rate detection

2007-03-27

2007-03-27

Arana, Louis M. (Department: 2859)

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

C324S318000

Reexamination Certificate

active

11276821

ABSTRACT:
A material having a permanent external diametrical electric field is included within an NMR MAS spinner. Such materials include ferroelectret porous films, in which the electric polarization arises from opposite mono-polar charges on separated surfaces within a structured material containing voids. Rotation of electrically polarized material produces a time-dependent electric field, modulated at the rotational frequency, so that a simple antenna achieves high sensitivity and phase stability in spin rate detection. The electrically polarized material is also of sufficiently high resistivity that modulation of the external NMR polarizing magnetic field B0is negligible.

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“Electret Sensors, Filters, and MEMS Devices” by Malti Goel, in Current Science, vol. 85, #4, Aug. 25, 2003, pp. 443-453.

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