(MAS)ⁿ, n ≤ 8

Area of Science:

• Materials Science
• Analytical Chemistry
• Spectroscopy

Background:

• Solid-state magic angle spinning (MAS) nuclear magnetic resonance (NMR) is a powerful technique for characterizing solid materials.
• Traditional MAS NMR requires specialized and often expensive equipment, limiting its accessibility.

Purpose of the Study:

• To develop and demonstrate a low-cost, 3D-printable MAS stator for benchtop NMR magnets.
• To enable simultaneous spinning of multiple solid samples within a single NMR probe.
• To reduce the cost barrier for solid-state MAS NMR applications.

Main Methods:

• 3D printing of a novel MAS stator design capable of holding multiple rotors.
• Experimental setup utilizing a benchtop magnet and standard NMR probe.
• Acquisition of 79Br NMR spectra for single and multiple powdered solid samples (KBr, NaBr).

Main Results:

• Stable spinning of powdered solid samples in 4 mm rotors up to 7 kHz achieved.
• Demonstrated increase in signal-to-noise ratio by simultaneously spinning multiple samples of the same material.
• Successful execution of mixed-sample studies using rotors with different materials (KBr and NaBr).
• A stator design for spinning up to 8 samples simultaneously was presented.

Conclusions:

• The 3D-printed MAS stator significantly lowers the cost and complexity of solid-state MAS NMR.
• Simultaneous multi-sample spinning enhances experimental efficiency and signal detection.
• This technology democratizes access to solid-state MAS NMR for broader research communities.