Atomic scale analysis of nuclear spin clusters realized by MRI

The research team of Du Jiangfeng of the University of Science and Technology of China and its theoretical collaborators successfully used a nitrogen-vacancy solid-state single-electron spin quantum interferometer in doped diamond to successfully detect single-nuclear spin pairs and their atomic-scale structure in a room-temperature atmosphere analysis. This result was published in Nature-Physics.

Traditional spin magnetic resonance studies of tens of billions of ensemble samples have been widely used in basic research and medical applications and other major fields. In recent years, spin magnetic resonance has gradually moved from statistical average measurement to directly obtaining single quantum state information. Achieving this goal enables us to directly measure the composition, structure, and dynamic properties of atomic-scale material units, thereby understanding the structure and properties of matter more fundamentally. However, subject to traditional magnetic resonance detection methods, there is an urgent need to innovate magnetic resonance methods to achieve this goal.

The Research Group of Du Jiangfeng of the University of Science and Technology of China and its collaborators used nitrogen-vacancy solid-state single-electron spin quantum interferometer in doped diamond to convert the weak magnetic signal generated by the micro-spin system into the phase of the interferometer, which was successfully realized at room temperature atmospheric The detection of single-core spin pairs and their atomic-scale structural analysis are presented. The reviewers commented as "This work is original and novel. It is a very useful method to measure the weak magnetic signal generated by nuclear spin pairs using dynamic decoupling technology", "This work realizes the detection of nuclear spin pairs And structural analysis, this new method will attract widespread attention in the field of quantum information such as quantum information processing and quantum measurement. "

Prior to this, Professor Du Jiangfeng cooperated with the German and American research group to realize the detection of proton signals in (5nm) 3 organic samples, and made breakthrough progress in microscopic nuclear magnetic resonance technology. The results were published in Science. The monograph commented during the same period was "using diamond-based nanomagnetometers, effectively reducing the detectable volume of magnetic resonance imaging to the level of a single protein molecule."

These experimental studies have shown that dynamic decoupling combined with single-spin probes is a powerful tool for single molecule structure analysis and spectroscopic analysis, which can help us obtain material composition and structure information at the nanometer or even atomic scale. It provides new methods for microscopic research in various fields such as physical biology.

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