Sensing H+ with conventional neural probes

Trantidou, T., Prodromakis, T., Tsiligkiridis, V., Chang, Y.C. and Toumazou, C. (2013) Sensing H+ with conventional neural probes. Applied Physics Letters, 102 (22), 223506-[4pp]. (doi:10.1063/1.4809674).

Abstract

In this paper, we demonstrate a technique for transforming commercially available neural probes used for electrical recordings, into chemical sensing devices for detection of ionic concentrations in electrolytes, with particular emphasis to pH. This transformation requires a single post-processing step to incorporate a thin indium tin oxide membrane for sensing H+. Measured results indicate a chemical sensitivity of 28?mV/pH, and relatively low leakage currents (2–10?nA) and drifts (1–10?mV/h). The proposed sensing device demonstrates the possibility of a low-cost implementation that can be reusable and thus versatile, with potential applications in real-time extracellular but mainly intracellular chemical monitoring

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• Electronics & Computer Science > Nanoelectronics and Nanotechnology

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