Gold Nanoframe Array Electrode for Straightforward Detection of Hydrogen Peroxide

The nanostructuring of a sensing membrane is performed through colloidal nanosphere lithography (NSL) techniques with tiny polystyrene nanobead template 100 nm in size. solvent ratio adjustment has been proven to be effective assisting the monolayer deposition small templating particles minimal defects. Two distinct structures, namely, billowy gold nanostructure (BGN) where left unetched and nanoframe array (GNA) regular ring-like structure after removal, are used for extended-gate field-effect transistor (EGFET) electrodes. GNA generates an electroactive surface area significantly (~20%) larger than its geometrical as well greater roughness BGN. When integrated portable constant voltage–constant current (CVCC) FET circuitry pH screening determine optimized measurement conditions H2O2 sensing, also shows more improved Nernstian sensitivity at ~50 mV/pH BGN electrode. then using detection H2O2, most common representative reactive oxygen species (ROS) involved environment, food, neurodegenerative diseases, such Parkinson´s Alzheimer´s diseases. electrode 70.42 mV/log µM [H2O2] limit (LoD) 1.183 H2O2. ion system employing unique, highly ordered gate electrodes CVCC circuit shown stable real-time output voltage signal, representing alternative bulky conventional devices potential on-site detection.