One-Shot Resin 3D-Printed Stators for Low-Cost Fabrication of Magic-Angle Spinning NMR Probeheads,Analytical Chemistry

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One-Shot Resin 3D-Printed Stators for Low-Cost Fabrication of Magic-Angle Spinning NMR Probeheads
Analytical Chemistry ( IF 6.7 ) Pub Date : 2023-06-27 , DOI: 10.1021/acs.analchem.3c01323
Daniel Pereira ₁ , Mariana Sardo ₁ , Ildefonso Marín-Montesinos ₁ , Luís Mafra ₁

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Additive manufacturing such as three-dimensional (3D)-printing has revolutionized the fast and low-cost fabrication of otherwise expensive NMR parts. High-resolution solid-state NMR spectroscopy demands rotating the sample at a specific angle (54.74°) inside a pneumatic turbine, which must be designed to achieve stable and high spinning speeds without mechanical friction. Moreover, instability of the sample rotation often leads to crashes, resulting in costly repairs. Producing these intricate parts requires traditional machining, which is time-consuming, costly, and relies on specialized labor. Herein, we show that 3D-printing can be used to fabricate the sample holder housing (stator) in one shot, while the radiofrequency (RF) solenoid was constructed using conventional materials available in electronics stores. The 3D-printed stator, equipped with a homemade RF coil, showed remarkable spinning stability, yielding high-quality NMR data. At a cost below 5 €, the 3D-printed stator represents a cost reduction of over 99% compared to repaired commercial stators, illustrating the potential of 3D-printing for mass-producing affordable magic-angle spinning stators.

中文翻译：

用于低成本制造魔角旋转 NMR 探头的一次性树脂 3D 打印定子

三维 (3D) 打印等增材制造彻底改变了昂贵的 NMR 零件的快速、低成本制造方式。高分辨率固态核磁共振波谱需要在气动涡轮机内以特定角度 (54.74°) 旋转样品，涡轮机的设计必须能够实现稳定且高的旋转速度，而无需机械摩擦。此外，样品旋转的不稳定常常会导致崩溃，从而导致昂贵的维修费用。生产这些复杂的零件需要传统的机械加工，这既耗时又昂贵，并且依赖于专业劳动力。在此，我们展示了 3D 打印可用于一次性制造样品支架外壳（定子），而射频 (RF) 螺线管是使用电子商店中出售的传统材料构建的。3D打印的定子，配备自制射频线圈，表现出卓越的旋转稳定性，产生高质量的核磁共振数据。与修复的商业定子相比，3D 打印定子的成本低于 5 欧元，成本降低了 99% 以上，这说明了 3D 打印在批量生产经济实惠的魔角旋转定子方面的潜力。

更新日期：2023-06-27

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