Enhanced Optical 13 C Hyperpolarization in Diamond Treated by High‐Temperature Rapid Thermal Annealing
| Autor: | Alexander I. Shames, Xudong Lv, Susan Le, Ashok Ajoy, Alessandra Aguilar, Max Gierth, Alexander Pines, Carlos A. Meriles, Alexander M. Zaitsev, Emanuel Druga, Nicholas Nunn, Jeffrey A. Reimer, Olga Shenderova, Marco D. Torelli, Richard Zhao, Valentin Krespach, Ruhee Nirodi, Priyanka Raghavan, Mengze Shen |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Annealing (metallurgy) Diamond Statistical and Nonlinear Physics 02 engineering and technology Electron engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Molecular physics Electronic Optical and Magnetic Materials Paramagnetism Computational Theory and Mathematics Vacancy defect 0103 physical sciences engineering Hyperpolarization (physics) Electrical and Electronic Engineering 010306 general physics 0210 nano-technology Nanodiamond Mathematical Physics Order of magnitude |
| Zdroj: | Advanced Quantum Technologies. 3:2000050 |
| ISSN: | 2511-9044 |
| DOI: | 10.1002/qute.202000050 |
| Popis: | Author(s): Gierth, M; Krespach, V; Shames, AI; Raghavan, P; Druga, E; Nunn, N; Torelli, M; Nirodi, R; Le, S; Zhao, R; Aguilar, A; Lv, X; Shen, M; Meriles, CA; Reimer, JA; Zaitsev, A; Pines, A; Shenderova, O; Ajoy, A | Abstract: Methods of optical dynamic nuclear polarization open the door to the replenishable hyperpolarization of nuclear spins, boosting their nuclear magnetic resonance/imaging signatures by orders of magnitude. Nanodiamond powder rich in negatively charged nitrogen vacancy defect centers has recently emerged as one such promising platform, wherein 13C nuclei can be hyperpolarized through the optically pumped defects completely at room temperature. Given the compelling possibility of relaying this 13C polarization to nuclei in external liquids, there is an urgent need for the engineered production of highly “hyperpolarizable” diamond particles. Here, a systematic study of various material dimensions affecting optical 13C hyperpolarization in diamond particles is reported on. It is discovered surprisingly that diamond annealing at elevated temperatures ∼1720 °C has remarkable effects on the hyperpolarization levels enhancing them by above an order of magnitude over materials annealed through conventional means. It is demonstrated these gains arise from a simultaneous improvement in NV− electron relaxation/coherence times, as well as the reduction of paramagnetic content, and an increase in 13C relaxation lifetimes. This work suggests methods for the guided materials production of fluorescent, 13C hyperpolarized, nanodiamonds and pathways for their use as multimodal (optical and magnetic resonance) imaging and hyperpolarization agents. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text