Material Engineering
New Materials, New Opportunities
We engineer molecular materials that embed quantum sensors from the ground up. This includes the controlled growth of large, high-quality crystals—such as pentacene-doped naphthalene and p-terphenyl—enabled by a custom growth apparatus. Beyond crystals, we develop new molecular platforms and polymer-based 3D architectures tailored to host quantum sensors, enabling novel device geometries and expanding the versatility of quantum-sensor applications.
Molecular Systems
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Our first pentacene-doped crystal grown in lab!
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Crystal growth setup with 5 furnaces that can run simultaneously
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Pentacene-doped p-terphenyl crystals with varying pentacene concentration (0.3%, 0.1%, 0.05%)
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Comparison of one of our PDP crystals with a representative NV diamond sample
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Cross section of a growth tube for a pentacene-doped crystal
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A PDP crystal held up to the light to show off size and crystallinity
Novel Sensor Host Architecture
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NV nanodiamonds can be embedded in micron scale 3D printed materials
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Micro-3D printed benchy, scale bar of 200 microns
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~200 micron wide gryoid structure with nanodiamond coated surface
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A section of Michelangelo’s “The Creation of Adam” made used “bubble printed” nanodiamonds
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Confocal image of nanodiamonds (NDs) adhered to the surface of a gyroid microstructure.
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Micron-scale 3D printed “benchy” made with nanodiamond embedded resin
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“Bubble printed” UC Berkeley Cal logo
Latest publications about this work
B. W. Blankenship†, Y. Rho†, Z. Jones, T. Meier, R. Li, E. Druga, H. Singh, X. Xia, A. Ajoy*, C. P. Grigoropoulos* [PDF][SI]
arXiv:2502.16434 — ACS Appl. Mater. Interfaces 17, 69876 (2025)
Sophia N. Fricke, Haiyan Mao, Manas Sajjan, Ashok Ajoy, Velencia Witherspoon, Sabre Kais, Jeffrey A. Reimer [PDF]
arXiv:2508.20235
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).
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)
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.