Table 1.
Young’s moduli of example microelectrode substrates versus rat brain.
| Material | Approximate Young’s Moduli (MPa) | Refs. | |
|---|---|---|---|
| Silicon | ~165,000 | 61 | |
| Pt/Ir (90%/10%) | ~170,000 | 62 | |
| Cellulose nanocomposite | (Pre/Stiff)(Post/Soft) | 4,2001.6 | 40,63 |
| Thiol-ene/acrylateShape Memory Polymer | (Pre/Stiff)(Post/Soft) | ~2,000~30 | 28 |
| Rat brain tissue | 0.015–0.45 | 61,64,65 | |
While the methods and values vary in the reported literature, the relative magnitudes are conserved such that Young’s moduli of typical electrode substrates are much greater than polymer-based microelectrode substrates, even dynamically changing materials in their ‘stiff’ state.