Department of Chemistry, West Virginia University, Morgantown, WV 26506, USA.
J Magn Reson. 2011 Oct;212(2):249-53. doi: 10.1016/j.jmr.2011.07.009. Epub 2011 Jul 23.
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.
本文提出了一种在魔角旋转 NMR 中利用温度控制样品转子旋转速度的新方法。与传统 MAS NMR 系统中通过调节驱动气体流量的机电阀来控制旋转速度不同，我们使用直接位于定子中的小加热丝。只需 1 W 的低功率加热即可非常精确地控制样品的旋转速度。台式设备的实验结果验证了该系统的性能。
