Abstract
The design for a nuclear magnetic resonance (NMR) probe capable of detecting hydrogen signals at levels of <5×1016 H/sample is presented. In order to reduce background signals, the design eliminates polymeric materials from the probe head area and allows for a dry nitrogen purge during experimental runs to avoid signals due to ambient moisture. In addition, a metal cleaning process is employed that removes 1H NMR detectable contaminants from copper components. Use of this NMR probe for thin solid films and other low hydrogen content materials is demonstrated. The probe holds these samples without a NMR sample tube, further eliminating background hydrogen signals. In addition, a calibration curve for low hydrogen content standards demonstrates that NMR signal response is indeed linear at low hydrogen concentrations, leading to accurate quantification of hydrogen.
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Schedule a callMore From: Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films
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