I am a PhD student at Stanford and work in the
Microsystems group. My main project is developing improved tools for studying the senses of touch and hearing. One of the issues with studying these senses (generally called mechanotransduction) is that our bodies are very good sensors. The hair cells in our ear which allow us to hear can response to forces at the piconewton scale, about the amount of force to pull two covalently bonded atoms apart.
In esssence, my work is focused on making a better tool for poking individual neurons. This specifically means a device with a rise time on the order of one microsecond and force resolution of 10s of pN and capable of closed loop force control, all while operating in saline solution. Our group collaborates heavily with the
Goodman lab.
- Aluminum nitride on titanium for CMOS compatible piezoelectric
transducers, J.C. Doll, B.C. Petzold, B. Ninan, R. Mullapudi,
B.L. Pruitt, submitted August 2009.
- Force sensing optimization and applications, J. C. Doll,
S.-J. Park, A.J. Rastegar, N. Harjee, J.R. Mallon Jr., G. Hill,
A.A. Barlian and B.L. Pruitt, to appear in Advanced Materials and
Technologies for Micro/Nano-Devices, Sensors and Actuator, Springer
expected publication November 2009.
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Design optimization of piezoresistive cantilevers for force
sensing in air and water, J.C. Doll, S.-J. Park, B.L. Pruitt,
Journal of Applied Physics (2009). Also selected for the Virtual
Journal of Nanoscale Science & Technology. (Free,
opensource Matlab design optimization code)
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SU-8 Force Sensing Pillar Arrays for Biological Measurements, J.C. Doll, N. Harjee, N. Klejwa, R. Kwon, S. Coulthard, B.C. Petzold, M.B. Goodman, B.L. Pruitt, Lab on a Chip (2009).
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Artificial dirt: Microfluidic substrates for nematode neurobiology and behavior, S. Lockery, K. Lawton, J.C. Doll, S. Faumont, S. Coulthard, T. Thiele, N. Chronis, K. McCormick, M. Goodman, B. Pruitt. Journal of Neurophysiology (2007).
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The phenomenon of twisted growth: Humeral torsion in dominant arms of high performance tennis players, R.E. Taylor, C. Zheng, R.P. Jackson, J.C. Doll, J.C. Chen, K.R.S. Holzbaur, T. Besier, E. Kuhl. Computer Methods in Biomechanics and Biomedical Engineering (2007).
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High-speed multispectral imaging of nanoplasmonic array, G.L. Liu*, J.C. Doll*, L.P. Lee. Optics Express, 13, 8520-8525 (2005)
- Magnetic Nanocrescents as Controllable Surface-Enhanced Raman Scattering Nanoprobes for Biomolecular Imaging, G.L. Liu, Y. Lu, J. Kim, J.C. Doll, L.P. Lee. Advanced Materials, 17, 2683-2688 (2005)
* = equal contribution
- A High d33 CMOS Compatible Process for Aluminum Nitride on Titanium, J.C. Doll, B.C. Petzold, B. Ninan, R. Mullapudi, B.L. Pruitt, Transducers (2009).
- High Frequency Force Sensing with Piezoresistive Cantilevers, J.C. Doll, B.C. Petzold, P. Ghale, M.B. Goodman, B.L. Pruitt, Transducers (2009).
- Measuring Thresholds for Touch Sensation in C. elegans, J.C. Doll, S. Muntwyler, F. Beyeler, S. Geffeney, M.B. Goodman, B.J. Nelson, B.L. Pruitt, Microtechnologies in Medicine and Biology (2009). Best Abstract Award
- Exploring Cellular Tensegrity: Physical Modeling and Computational Simulation, C.H. Zheng, J.C. Doll, E. Gu, E.H. Barnard, Z. Huang, A. Kia, M. Ortiz, B.C. Petzold, T. Usui, R. Kwon, C. Jacobs, E. Kuhl, ASME Summer Bioengineering Conference (2008).
- Biological Measurements of C. elegans Touch Sensitivity with Microfabricated Force Sensors, J.C. Doll, N. Harjee, N. Klejwa, R. Kwon, S. Coulthard, M. Goodman, B. Pruitt, MicroTAS (2007)
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Molecular Engineering of Smart Protein Scaffolds for Cardiac Stem Cell Differentiation, J. Blundo, O. Abilez, K. Straley, J.C. Doll, F. Cao, J. Wu, C. Zarins, S. Heilshorn, B. Pruitt. Materials Research Society Fall Meeting (2007)
Here are my
personal website and
photos. In case you're interested, here's my
CV as of August 2006.
