Artículo
Orientation-independent room temperature optical 13C hyperpolarization in powdered diamond
Ajoy, Ashok; Liu, Kristina; Nazaryan, Raffi; Lv, Xudong; Zangara, Pablo René
; Safvati, Benjamin; Wang, Guoqing; Arnold, Daniel; Li, Grace; Lin, Arthur; Raghavan, Priyanka; Druga, Emanuel; Dhomkar, Siddharth; Pagliero, Daniela; Reimer, Jeffrey A.; Suter, Dieter; Meriles, Carlos A.; Pines, Alexander
Fecha de publicación:
05/2018
Editorial:
Science Advances is the American Association for the Advancement of Science
Revista:
Science Advances
e-ISSN:
2375-2548
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Dynamic nuclear polarization via contact with electronic spins has emerged as an attractive route to enhance the sensitivity of nuclear magnetic resonance beyond the traditional limits imposed by magnetic field strength and temperature. Among the various alternative implementations, the use of nitrogen vacancy (NV) centers in diamond-a paramagnetic point defect whose spin can be optically polarized at room temperature-has attracted widespread attention, but applications have been hampered by the need to align the NV axis with the external magnetic field. We overcome this hurdle through the combined use of continuous optical illumination and a microwave sweep over a broad frequency range. As a proof of principle, we demonstrate our approach using powdered diamond with which we attain bulk 13C spin polarization in excess of 0.25% under ambient conditions. Remarkably, our technique acts efficiently on diamond crystals of all orientations and polarizes nuclear spins with a sign that depends exclusively on the direction of the microwave sweep. Our work paves the way toward the use of hyperpolarized diamond particles as imaging contrast agents for biosensing and, ultimately, for the hyperpolarization of nuclear spins in arbitrary liquids brought in contact with their surface.
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Articulos(IFEG)
Articulos de INST.DE FISICA ENRIQUE GAVIOLA
Articulos de INST.DE FISICA ENRIQUE GAVIOLA
Citación
Ajoy, Ashok; Liu, Kristina; Nazaryan, Raffi; Lv, Xudong; Zangara, Pablo René; et al.; Orientation-independent room temperature optical 13C hyperpolarization in powdered diamond; Science Advances is the American Association for the Advancement of Science; Science Advances; 4; 5; 5-2018; 1-8
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