@article {2979,
	title = {Orientation independent room-temperature optical 13C hyperpolarization in powdered diamond},
	journal = {Science Advances},
	volume = {4},
	year = {2018},
	month = {05/2018},
	abstract = {<p>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\&mdash;a paramagnetic point defect whose spin can be optically polarized at room temperature\&mdash;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 <sup>13</sup>C 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<br />
	of nuclear spins in arbitrary liquids brought in contact with their surface.</p>
},
	doi = {10.1126/sciadv.aar5492 },
	url = {http://advances.sciencemag.org/content/4/5/eaar5492},
	author = {Ashok Ajoy and Kristina Liu and Raff Nazaryan and Xudong Lv and Pablo R. Zangara and Benjamin Safvati and Guoqing Wang and Daniel Arnold and Grace Li and Arthur Lin and Priyanka Raghavan and Emanuel Druga and Siddharth Dhomkar and Daniela Pagliero and Jeffrey A. Reimer and Dieter Suter and Carlos A. Meriles and Alexander Pines}
}
@article {2391,
	title = {An optimized microfabricated platform for the optical generation and detection of hyperpolarized 129Xe},
	journal = {Scientific Reports },
	year = {2017},
	url = {http://www.nature.com/articles/srep43994},
	author = {Daniel J. Kennedy and Scott J. Seltzer and Ricardo Jimenez-Martinez and Hattie L. Ring and Nicholas Malecek and Svenja Knappe and Elizabeth Donley and John Kitching and Vikram S. Bajaj and Alexander Pines}
}
