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Shown below is a chemical-sensing field effect transistor (FET) in the absence of an applied gate potential. Explain how a chemical-sensing FĚT generates a response to an analyte by arranging the following statements in order. First Step Last Step The sample is introduced to the gate. A voltage is applied between the source and the drain, but no current flows. A current flows between the source and drain as a conductive channel forms. The current flowing between the source and the drain changes. A positive potential is applied to the gate, which attracts electrons from the base. Analyte adsorbs onto the chemically-sensitive gate, resulting in a change in potential of the gate. A potential is applied to the external circuit to return the current to its original value. Source (-) (Gate) Metal contact SiO, insulator (+) O (Base) Drain Depletion region Electrical contact between source and base

Shown below is a chemical-sensing field effect transistor (FET) in the absence of an applied gate potential. Explain how a chemical-sensing FĚT generates a response to an analyte by arranging the following statements in order. First Step Last Step The sample is introduced to the gate. A voltage is applied between the source and the drain, but no current flows. A current flows between the source and drain as a conductive channel forms. The current flowing between the source and the drain changes. A positive potential is applied to the gate, which attracts electrons from the base. Analyte adsorbs onto the chemically-sensitive gate, resulting in a change in potential of the gate. A potential is applied to the external circuit to return the current to its original value. Source (-) (Gate) Metal contact SiO, insulator (+) O (Base) Drain Depletion region Electrical contact between source and base

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Shown below is a chemical-sensing field effect transistor (FET) in the absence of an applied gate potential. Explain how a chemical-sensing FĚT generates a response to an analyte by arranging the following statements in order. First Step Last Step The sample is introduced to the gate. A voltage is applied between the source and the drain, but no current flows. A current flows between the source and drain as a conductive channel forms. The current flowing between the source and the drain changes. A positive potential is applied to the gate, which attracts electrons from the base. Analyte adsorbs onto the chemically-sensitive gate, resulting in a change in potential of the gate. A potential is applied to the external circuit to return the current to its original value. Source (-) (Gate) Metal contact SiO, insulator (+) (Base) Drain Depletion region Electrical contact between source and base
Transcribed Image Text:Shown below is a chemical-sensing field effect transistor (FET) in the absence of an applied gate potential. Explain how a chemical-sensing FĚT generates a response to an analyte by arranging the following statements in order. First Step Last Step The sample is introduced to the gate. A voltage is applied between the source and the drain, but no current flows. A current flows between the source and drain as a conductive channel forms. The current flowing between the source and the drain changes. A positive potential is applied to the gate, which attracts electrons from the base. Analyte adsorbs onto the chemically-sensitive gate, resulting in a change in potential of the gate. A potential is applied to the external circuit to return the current to its original value. Source (-) (Gate) Metal contact SiO, insulator (+) (Base) Drain Depletion region Electrical contact between source and base
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