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ref: -0 tags: electrode area review impedance date: 04-28-2017 17:55 gmt revision:9 [8] [7] [6] [5] [4] [3] [head]

Quick review of electrode area / impedance within m8ta:

  • {895} 500um^2
  • {311} 490um^2 nominal; 900k
  • {1040} 108um^2, plated from 5M to 1M.
  • Neuronexus: 177, 413um, 700um, and 1250um.
    • Suggest 177um for SUA, 413um for MUA.
    • Community consensus seems to be that these electrodes don't last as long, though.
    • Electroplating 177um^2 sites with PEDOT:PSS reduces impedance to 23k {1388}
  • {823} 122um^2 nominal
  • {736} 500um^2
  • {1027} (Utah) 1600um^2
    • Impedance: ~ 220K +-91K (in vivo -- large variance)
    • Blackrock site lists impedance @ 400k
  • SIrOF Utah array -- 3100um^2 (3.1e-5cm^2) -- large!
    • Impedance ~50K according to [www.blackrockmicro.com/userfiles/file/Microelectrode%20Arrays.pdf Blackrock product brochure].
  • PMID-20124668 (Utah again) 2000um^2, 125k Pt, 6k SIROF.
  • Neuropixel: 144um^2 acid-etched TiN
  • Carbon fiber: ~38 um^2, PEDOT:PSS or PEDOT:pTS started ~ 4M, plated down to ~ 130k initial, went up to 2M pSS, 840k pTS.