200 GHz single chip microsystems for dynamic nuclear polarization enhanced NMR spectroscopy

Nergiz Sahin Solmaz (), Reza Farsi and Giovanni Boero
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Nergiz Sahin Solmaz: Institute of Electrical and Micro Engineering (IEM) and Center for Quantum Science and Engineering (QSE) École Polytechnique Fédérale de Lausanne (EPFL)
Reza Farsi: Institute of Electrical and Micro Engineering (IEM) and Center for Quantum Science and Engineering (QSE) École Polytechnique Fédérale de Lausanne (EPFL)
Giovanni Boero: Institute of Electrical and Micro Engineering (IEM) and Center for Quantum Science and Engineering (QSE) École Polytechnique Fédérale de Lausanne (EPFL)

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Dynamic nuclear polarization (DNP) is one of the most powerful and versatile hyperpolarization methods to enhance nuclear magnetic resonance (NMR) signals. A major drawback of DNP is the cost and complexity of the required microwave hardware, especially at high magnetic fields and low temperatures. To overcome this drawback and with the focus on the study of nanoliter and subnanoliter samples, this work demonstrates 200 GHz single chip DNP microsystems where the microwave excitation/detection are performed locally on chip without the need of external microwave generators and transmission lines. The single chip integrated microsystems consist of a single or an array of microwave oscillators operating at about 200 GHz for ESR excitation/detection and an RF receiver operating at about 300 MHz for NMR detection. This work demonstrates the possibility of using the single chip approach for the realization of probes for DNP studies at high frequency, high field, and low temperature.

Date: 2024
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DOI: 10.1038/s41467-024-49767-z

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