Abstract
The use of FTO samples as an extended gate field effect transistor biosensor is presented. The FTO samples were produced by spray pyrolysis technique. The cleaning process is shown to have a fundamental importance for the final sensitivity of the samples when multiple re-usage is adopted. The role of electrical resistivity and morphology of the films are investigated. The influence of pH sequence of measurements from 2 to 12 is presented. Both increasing and decreasing the pH values sequence of measurements are compared. Electrical, morphological, time evolution and electrochemical experiments are correlated in the main discussion. A physical-chemical model is presented to explain the main mechanisms of charge adsorption and desorption. Parameters not commonly reported in the literature are proven to have fundamental importance in sensors behavior and characterization.
Highlights
Nanotechnology has provided a true revolution towards miniaturization
Among the huge variety of sensors, the electrochemical ones, specially the Extended Gate Field Effect Transistor (EGFET) type of sensors, can be highlighted as really promising devices because of their intrinsic properties such as possible miniaturization, high entrance impedance, low cost, simple equipment required and possibility to use a broad variety of materials including biocompatible ones[1].Those sensors can be used on the composition of biosensors
It was shown that the cleaning process can influence the final response of Fluorine Tin Oxide (FTO) films when used as an EGFET pH sensor
Summary
Nanotechnology has provided a true revolution towards miniaturization. In material science and engineering, increasing efforts have been applied to the development of new materials or devices at micro and nanoscale. Among the huge variety of sensors, the electrochemical ones, specially the Extended Gate Field Effect Transistor (EGFET) type of sensors, can be highlighted as really promising devices because of their intrinsic properties such as possible miniaturization, high entrance impedance, low cost, simple equipment required and possibility to use a broad variety of materials including biocompatible ones[1].Those sensors can be used on the composition of biosensors. Oxides such as TiO22, SnO23 and ZnO1 can be used as sensing part in these devices. The biocompatibility of these materials has already been demonstrated by other research groups[4,5,6,7,8], and they have been used as part of various types of biosensors
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
