pH sensor based on AuNPs/ ITO membrane as extended gate field-effect transistor
نویسندگان
چکیده
In the present work, gold nanoparticles/indium tin oxide (AuNPs/ITO) thin films were analyzed for pH sensing application based on extended gate field-effect transistor (EGFET). The AuNPs synthesized through pulsed laser ablation in liquid (PLAL) technique. Afterwards, deposited onto ITO film by electrospinning method. characterized using transmission electron microscope (TEM) and UV–Vis spectroscope techniques. From TEM analysis, size of spherical-shaped was found to be range 5–22 nm. spectroscopy analysis revealed absorption peak at 518 nm, indicating purplish red color. AuNPs/ITO also field emission scanning (FE-SEM) X-Ray Photoelectron Spectroscopy (XPS) depth 6.498 µm Au 4f doublet binding energy peaks photoelectrons 83.79 87.45 eV. current–voltage (I-V) curves indicated sensitivities values 43.6 mV/pH 0.6 ?A1/2pH?1 with linear regression 0.99 voltage current sensitivities, respectively. hysteresis drift characteristics prepared done investigate stability reliability films. results this work demonstrated that is quite useful acidity basicity detection.
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ژورنال
عنوان ژورنال: Applied Physics B
سال: 2021
ISSN: ['1432-0649', '0946-2171']
DOI: https://doi.org/10.1007/s00340-021-07727-1