90. high density individually addressable nanowire arrays record intracellular activity from primary rodent and human stem cell derived neurons

Department: Electrical & Computer Engineering
Faculty Advisor(s): Shadi A. Dayeh

Primary Student
Name: Ren Liu
Email: rel025@ucsd.edu
Phone: 858-281-8072
Grad Year: 2019

Abstract
We report a new hybrid integration scheme that offers for the first time a nanowire-on-lead approach, which enables independent electrical addressability, is scalable, and has superior spatial resolution in vertical nanowire arrays.The fabrication of these nanowire arrays is demonstrated to be scalable down to submicrometer site-to-site spacing and can be combined with standard integrated circuit fabrication technologies. We utilize these arrays to perform electrophysiological recordings from mouse and rat primary neurons and human induced pluripotent stem cell (hiPSC)-derived neurons, which revealed high signal-to-noise ratios and sensitivity to subthreshold postsynaptic potentials (PSPs). We measured electrical activity from rodent neurons from 8 days in vitro (DIV) to 14 DIV and from hiPSC-derived neurons at 6 weeks in vitro post culture with signal amplitudes up to 99 mV. Overall, our platform paves the way for longitudinal electrophysiological experiments on synaptic activity in human iPSC based disease models of neuronal networks, critical for understanding the mechanisms of neurological diseases and for developing drugs to treat them.

Industry Application Area(s)
Electronics/Photonics | Life Sciences/Medical Devices & Instruments | Semiconductor

Related Links:

  1. http://ucop.edu/research-initiatives/programs/lab-fees/2017%20LFRP%20Awards.html
  2. https://www.sciencedaily.com/releases/2017/04/170411135858.htm
  3. http://iebl.ucsd.edu/

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