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J Magn Reson. 2011 Oct;212(2):249-53. doi: 10.1016/j.jmr.2011.07.009. Epub 2011 Jul 23.

Using heat to control the sample spinning speed in MAS NMR.

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Department of Chemistry, West Virginia University, Morgantown, WV 26506, USA.


A new approach using temperature to control the spinning speed of a sample rotor in magic-angle spinning NMR is presented. Instead of an electro-mechanical valve that regulates the flow of drive gas to control the spinning speed in traditional MAS NMR systems, we use a small heater wire located directly in the stator. The sample spinning speed is controlled very accurately with a surprisingly low heating power of 1 W. Results on a benchtop unit demonstrate the capability of the system.

[Indexed for MEDLINE]

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