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Meeting 2013 TMS Annual Meeting & Exhibition
Symposium 2013 and Beyond: Flexible Electronics
Presentation Title Shape Memory Polymer Substrates for Softening, 3D Neural Interfaces
Author(s) Taylor Ware, Dustin Simon, Walter Voit
On-Site Speaker (Planned) Taylor Ware
Abstract Scope Silicon-based neural interfaces have been shown to have limited stability during chronic implantation. This general failure of electronic devices, usually within a year of implantation, has been partially attributed to the extreme mechanical and geometrical mismatch between the substrate and tissue. In this work a smart polymer capable of softening in response to physiological conditions, despite low water uptake, is developed. Substrates are designed to remain in the high modulus, glassy state during implantation and soften after implantation. The novel thiol-ene/acrylate substrate provides control of the glass transition temperature and modulus in physiological conditions. The shear modulus under simulated physiological conditions increases with diacrylate content from 6.5 to 30 MPa. A process is described that allows for the use of substrates in a planar state for processing and subsequent programming of a 3D shape. This allows for high-density electrode fabrication on substrates that conform to complex neural tissue after implantation.
Proceedings Inclusion? Planned:


Brain Matched Magnetic Susceptibility in Metallic Alloys for Use during MR Imaging
Electrochemical Gating and Oxide Field-effect Transistors: Switching Speed and Device Stability Issues
Electrochemical Properties of Neural Interfaces on Smart, Softening Substrates
Fabricating High-Strain Capacity Conductors on Shape Memory Polymers in Metastable States to Accommodate Large Shape Changes in Flexible Electronic Devices
Flexible Organic Thin Film Transistors for Neural Interfaces
Flexible Organic Transistors on Shape Memory Polymer Substrates for Conformable Biointegrated Interfaces
Flexible, Large-Area Sensor Circuits Fabricated by Additive Printing
Graphene Coated with Titanium Nitride as Electrode Materials for Neural Interfaces
Growth Time Performance Dependence of Vertically Aligned Carbon Nanotube Supercapacitors Grown on Aluminum Substrates
High-Performance Flexible Organic Photovoltaic Cells with Amorphous ZITO Electrode
Low-Temperature Materials for a Neuromorphic Architecture
Shape Memory Polymer Substrates for Softening, 3D Neural Interfaces
Use of Compliant Materials in the Fabrication of a Flexible Utah Neural Interface Electrode Array

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