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I am a scientist interested in the physical principles driving morphogenesis. Geometry and mechanics often provide a powerful lens for understanding the mechanisms governing material behavior. I apply this lens to understand shape change in living tissues — in which geometry and mechanics interact with genetic signals — as well as the behavior of soft materials — such as thin elastic sheets, cytoskeletal gels, and metamaterials. I am currently most interested in how biology uses physics to sculpt visceral organs during morphogenesis, incorporating approaches from computer science, and cellular/molecular biology.

I am a Helen Hay Whitney Foundation fellow in the Kavli Institute for Theoretical Physics at UC Santa Barbara, where I work with Sebastian Streichan, Boris Shraiman, and Zvonimir Dogic. My PhD work at the University of Chicago with William Irvine revealed that amorphous structures can support topologically insulating phases of matter, explored how curvature controls the energetics and paths of cracks in thin sheets, explained fracture patterns in nanoparticle sheets stamped on corrugated substrates, and related findings. In my undergraduate years, I studied how galactic-scale flows affect the evolution of dwarf galaxies.

Contact

email: npmitchell@kitp.ucsb.edu
ORCiD: https://orcid.org/0000-0003-1922-8470
Scholar: https://scholar.google.com/citations?user=2xEDEh0AAAAJ&hl=en

Recent awards

Helen Hay Whitney Foundation Fellowship (2020-present)
Springer Thesis Award (2019)
Otis Williams Postdoctoral Fellowship (2019-2020)
Yodh Prize in experimental physics (2017)
Wentzel Teaching Prize from University of Chicago (2013)
Other graduate fellowships (2012-2016)

Selected Publications

N. P. Mitchell, D. J. Cislo, S. Shankar, Y. Lin, B. I. Shraiman, S. J. Streichan, “Visceral organ morphogenesis via calcium-patterned muscle contractions.” eLife 11:e77355 (2022) [link]
N. P. Mitchell, L. M. Nash, D. Hexner, A. M. Turner, W. T. M. Irvine. “Amorphous topological insulators constructed from random point sets.” Nature Physics 14380–385 (2018) [link]
N. P. Mitchell, V. Koning, V. Vitelli, W. T. M. Irvine, “Fracture in sheets draped on curved surfaces.” Nature Materials 16, 89-93 (2017) [link]
N. P. Mitchell, R. Carey, J. Hannah, Y. Wang, M. Cortes, S. McBride, H. Jaeger. “Conforming nanoparticle sheets to surfaces with Gaussian curvature.” Soft Matter, 14, 9107 – 9117 (2018) [link]
N. P. Mitchell, L. M. Nash, W. T. M. Irvine. “Realization of a topological phase transition in gyroscopic lattices.” Physical Review B 97, 100302(R) (2018) [link]