57. Enhanced Reactivity at the Oil-Water Interface Accelerates the Synthesis of Zymonic Acid in Microemulsions
B. Wallace, M. Makhnun, R. Bachnak, P. Kim, M. Ahmed, C. Dutcher, K. Wilson*, A.Ajoy* [PDF]
Chem. Sci. 16, 15155 (2025) [Edge Article].
56. Electronic Spin Relaxation and Clustering in High-Pressure High-Temperature Synthesized Microcrystalline Diamond Particles with Reduced Nitrogen Content
N. Nunn, S. Milikisiyants, M. Torelli, A. Healey, R. Styles, B. Johnson, J-P. Tetienne, P. Reineck, C. Long, T. Dumm, A. Dalis, H. Abe, T. Ohshima, L. Moon, E. Druga, A. Ajoy, A.I. Shames, A. Smirnov, O. Shenderova [PDF]
Journal of Physical Chemistry C 129, 7493 (2025).
55. Nanoscale engineering and dynamical stabilization of mesoscopic spin textures
K. Harkins†, C. Fleckenstein†, N. D'Souza†, P. M. Schindler†, D. Marchiori†, C. Artiaco, Q. Reynard-Feytis, U. Basumallick, W. Beatrez, A. Pillai, M. Hagn, A. Nayak, S. Breuer, X. Lv, M. McAllister, P. Reshetikhin, E. Druga, M. Bukov, A. Ajoy [PDF][SI]
arXiv:2310.05635 — Science Advances 11, 13, eadn9021 (2025)
54. Cryogenic field-cycling instrument for optical NMR hyperpolarization studies
N. D'Souza†, K. A. Harkins†, C. Selco, U. Basumallick, S. Breuer, Z. Zhang, P. Reshetikhin, M. Ho, A. Nayak, M. McAllister, E. Druga, D. Marchiori, A. Ajoy [PDF]
arXiv:2412.164715 — Journal of Magnetic Resonance 375, 107874 (2025).
Selected as the Journal Cover Article in J. Magn. Res.
53. Room-temperature quantum sensing with photoexcited triplet electrons in organic crystals
H. Singh, N. D'Souza, K. Zhong, E. Druga, J. Oshiro, B. Blankenship, J. A. Reimer, J. D. Breeze, A. Ajoy [PDF]
arXiv:2402.13898 — Phys. Rev. Research 7, 013192 (2025)
52. High-precision chemical quantum sensing in flowing monodisperse microdroplets
A. Sarkar†, Z. Jones†, M. Parashar, E. Druga, A. Akkiraju, S. Conti, P. Krishnamoorthi, S. Nachuri, P. Aman, M. Hashemi, N. Nunn, M. Torelli, B. Gilbert, K. R. Wilson, O. Shenderova, D. Tanjore, A. Ajoy [PDF][SI]
arXiv:2404.19313 — Science Advances 10, 50 (2024)
51. Anomalously extended Floquet prethermal lifetimes and applications to long-time quantum sensing
K. A. Harkins†, C. Selco†, C. Bengs, D. Marchiori, L. J. I. Moon, Z. R. Zhang, A. Yang, A. Singh, E. Druga, Y. Q. Song, A. Ajoy [PDF]
arXiv:2410.09028
50. Spatially Resolved Quantum Sensing with High-Density Bubble-Printed Nanodiamonds
B. Blankenship, J. Li, Z. Jones, M. Parashar, N. Zhao, H. Singh, R. Li, S. Arvin, A. Sarkar, R. Yang, T. Meier, Y. Rho, A. Ajoy*, C. Grigoropoulos* [PDF][SI]
Nano. Lett. 24, 9711 (2024)
49. Roadmap on Nanoscale Magnetic Resonance Imaging
R. Budakian, A. Finkler, A. Eichler, M. Poggio, C. Degen, S. Tabatabaei, I. Lee, C. Hammel, E. Polzik, T. Taminiau, R. Walsworth, P. London, A. Jayich, A. Ajoy, A. Pillai, J. Wrachtrup, F. Jelezko, Y. Bae, A. Heinrich, C. Ast, P. Bertet, P. Cappellaro, C. Bonato, Y. Altmann, E. Gauger [PDF]
arXiv:2312.08841 — Nanotechnology 35, 412001 (2024)
48. Electron-to-nuclear spectral mapping via "Galton board" dynamic nuclear polarization
A. Pillai, M. Elanchezhian, T. Virtanen, S. Conti, A. Ajoy* [PDF]
arXiv:2110.06826 — J. Chem. Phys. 159, 154201 (2023)
Selected as the Journal Cover Article in J. Chem. Phys.
Selected as the Editors' Featured Article in J. Chem. Phys.
47. Complex 3-dimensional microscale structures for quantum sensing applications
B. Blankenship†, Z. Jones†, N. Zhao, H. Singh, A. Sarkar, R. Li, E. Suh, A. Chen, C. Grigoropoulos*, A. Ajoy* [PDF][SI]
arXiv:2307.15233 — Nano. Lett. 23, 9272 (2023)
Spotlighted by Berkeley Engineering: Researchers demonstrate new 3D printing technique for quantum sensors.
46. Electron induced nanoscale nuclear spin relaxation probed by hyperpolarization injection
W. Beatrez, A. Pillai, O. Janes, D. Suter, A. Ajoy* [PDF][SI]
arXiv:2207.02827 — Phys. Rev. Lett. 131,010802 (2023).
Watch nuclear spins directly probing proximal electron relaxation: [Video 1] , [Video 2] , [Video 3] .
45. Optical and electronic spin properties of fluorescent micro- and nanodiamonds upon prolonged ultrahigh-temperature annealing
N. Nunn, S. Milikisiyants, M. Torelli, R. Monge, T. Delord, A. I. Shames, C. Meriles, A. Ajoy, A. I. Smirnov, O. Shenderova [PDF]
Journal of Vacuum Science & Technology B 41, 042206 (2023)
Spotlighted as a Featured article in JVST.
44. Critical prethermal discrete time crystal created by two-frequency driving
W. Beatrez†, C. Fleckenstein†, A. Pillai, E. Sanchez, A. Akkiraju, J. Alcala, S. Conti, P. Reshetikhin, E. Druga, M. Bukov*, A. Ajoy* [PDF]
arXiv:2201.02162 — Nature Physics 19, 407 (2023)
Watch the formation and melting of a time-crystal: [Video 1] , [Video 2] , [Video 3] .
43. Rapidly enhanced spin polarization injection in an optically pumped spin ratchet
A. Sarkar, B. Blankenship, E. Druga, A. Pillai, R. Nirodi, S. Singh, A. Oddo, P. Reshetikhin, A. Ajoy* [PDF] [SI]
arXiv:2112.07223 — Phys. Rev. Applied 18, 034079 (2022).
42. High-Field Magnetometry with Hyperpolarized Nuclear Spins
O. Sahin, E. d. L. Sanchez, S. Conti, A. Akkiraju, P. Reshetikhin, E. Druga, A. Aggarwal, B. Gilbert, S. Bhave, A. Ajoy* [PDF] [SI]
arXiv:2112.11612 — Nature Communications 13, 5486 (2022)
Selected as Editors Highlight by Nature Communications
Spotlighted by News & Views in Nature Physics: Magnetometry goes nuclear [pdf]
40. Beauty Beyond the Eye: Color Centers in Diamond Particles for Imaging and Quantum Sensing Applications
N. Nunn, M. Torelli, A. Ajoy, A. Smirnov, O. Shenderova [PDF]
Rev. Adv. Chem., 12, 1, (2022).
39. Floquet prethermalization with lifetime exceeding 90s in a bulk hyperpolarized solid
W. Beatrez, O. Janes, A. Akkiraju, A. Pillai, A. Oddo, P. Reshetikhin, E. Druga, M. McAllister, M. Elo, B. Gilbert, D. Suter, A. Ajoy* [PDF]
arXiv:2104.01988 -- Phys. Rev. Lett. 127, 170603 (2021).
Selected as Editors Suggestion by PRL
Spotlighted by Physics at PRL: Delaying Thermalization in a Periodically Driven System
Spotlighted in Nature Physics: Keep the spins spinning
38. "Galton board" nuclear hyperpolarization
M. Elanchezhian, A. Pillai, T. Virtanen, A. Ajoy* [PDF]
arXiv:2110.05742