Nanoporous metal multiple electrode array and method of making same
First Claim
1. A low-impedance nanoporous metal electrode array for measuring electrophysiological activity, the array comprising a patterned multiple electrode array including a metal alloy, the patterned multiple electrode array having a plurality of leads each extending from a contact pad to a nanoporous metal electrode tip that is configured to measure electrophysiological activity.
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Abstract
A method is disclosed for fabricating a low-impedance nanoporous metal multiple electrode array for measuring electrophysiology activity. A patterned photoresist is applied to a substrate, in which the patterned photoresist corresponds to a pattern of the nanoporous metal multiple electrode array. A metal alloy including a sacrificial alloying element is deposited in the pattern of the nanoporous metal electrode array. The patterned photoresist is removed to expose the metal alloy as deposited. At least part of the sacrificial alloying element is removed from the metal alloy to create nanoporous metal electrode tips thereby forming the nanoporous metal multiple electrode array. The resultant nanoporous metal multiple electrode array has improved impedance characteristics in comparison to conventional multiple electrode arrays.
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Citations
11 Claims
- 1. A low-impedance nanoporous metal electrode array for measuring electrophysiological activity, the array comprising a patterned multiple electrode array including a metal alloy, the patterned multiple electrode array having a plurality of leads each extending from a contact pad to a nanoporous metal electrode tip that is configured to measure electrophysiological activity.
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