Bio-FET Technology
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Questions and Answers

A Bio-FET consists of two main compartments: one is the biological recognition element and the other is the metal gate.

False

In a Bio-FET, the metal gate is replaced by an ion-sensitive membrane, electrolyte solution, and reference electrode.

True

The change in conductance of the FET channel in a Bio-FET is due to the binding of neutral molecules to the gate.

False

A SARS-CoV-2 biosensor with a Graphene transistor has a channel surface functionalized with spike protein antibody.

<p>True</p> Signup and view all the answers

The BioFET structure is primarily based on a type of field-effect transistor known as P-N junction transistor.

<p>False</p> Signup and view all the answers

The amount of detected protein in a SARS-CoV-2 biosensor with a Graphene transistor is inversely proportional to the variation in the transistor channel.

<p>False</p> Signup and view all the answers

The Nyquist plot represents the impedance of the electrode divided into an internal SAM layer and external biomolecules.

<p>True</p> Signup and view all the answers

The equivalent circuit for the Nyquist plot consists of four circuit elements: Solution resistance, constant phase elements CPE1, constant resistance Ra, and charge transfer resistance Rct.

<p>False</p> Signup and view all the answers

The Bio-FET is a field-effect transistor that is gated by changes in the surface potential induced by the binding of molecules.

<p>True</p> Signup and view all the answers

The FET channel in a biosensor MOSFET is not affected by biological recognition elements.

<p>False</p> Signup and view all the answers

An ion-sensitive field-effect transistor (ISFET) is also known as a biosensor field-effect transistor (Bio-FET).

<p>False</p> Signup and view all the answers

SARS-CoV-2 biosensors typically do not involve metal-oxide-semiconductor field-effect transistors (MOSFETs).

<p>False</p> Signup and view all the answers

The impedance profile of Zo at low frequencies tends to that of ZW at decreasing frequencies.

<p>False</p> Signup and view all the answers

A thicker film results in a higher frequency at which the curvature of the impedance spectrum is observed.

<p>False</p> Signup and view all the answers

Equivalent circuit models are not used to interpret EIS data.

<p>False</p> Signup and view all the answers

The dc current flow within the film increases with increasing film thickness.

<p>False</p> Signup and view all the answers

The FET channel is directly related to Electrochemical Impedance Spectroscopy.

<p>False</p> Signup and view all the answers

Metal-oxide-semiconductor field-effect transistors are a type of ion-sensitive field-effect transistors.

<p>True</p> Signup and view all the answers

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