Iridium Oxide Redox Gradient Material: <i>Operando</i> X-ray Absorption of Ir Gradient Oxidation States during IrO<i><sub>x</sub></i> Bipolar Electrochemistry
نویسندگان
چکیده
Electrodeposited iridium oxide (K1.7IrO0.8 (OH)2.2 × 1.8 H2O; also called IrOx) is among the best substrates for neural growth, decreasing impedance and stimulating cell when used as a connected electrode. Without direct contact, it has been proven to stimulate neurons through bipolar mechanism related conducting character of material in presence remote electric fields. The wireless electrostimulation that arises from large significance clinical applications. Ionic intercalation simultaneous with oxidation state changes at induced IrOx cathode formation redox ionic gradient substrate envisaged most probable explanation observed effects on growth. This work shows using X-ray absorption spectroscopy (XAS) significant electrochemical features relaxation times allow persistent effect even after field creating dipole switched off. It correlated intercalated sodium gradients by semiquantitative energy-dispersive (EDX) analysis data. yields new evidence behavior other biocompatible growth substrates.
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ژورنال
عنوان ژورنال: Journal of Physical Chemistry C
سال: 2021
ISSN: ['1932-7455', '1932-7447']
DOI: https://doi.org/10.1021/acs.jpcc.1c05012