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Related Concept Videos

Field Effect Transistor01:29

Field Effect Transistor

Field-effect transistors (FETs) are integral to electronic circuits and distinguished by their three-terminal setup: the gate, drain, and source. These transistors operate as unipolar devices, which utilize either electrons or holes as charge carriers, in contrast to bipolar transistors, which use both types of carriers. The primary function of the FET is to modulate the flow of these carriers from the source to the drain through a channel. The voltage difference between the gate and source...
MOSFET01:16

MOSFET

The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...
Characteristics of MOSFET01:17

Characteristics of MOSFET

Metal-oxide-semiconductor field-effect Transistors, or MOSFETs, play a critical role in electronic circuits. They are primarily utilized for amplifying and switching signals.
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable quicker...
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...
Biasing of FET01:22

Biasing of FET

Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the gate...

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Related Experiment Video

Updated: Jun 23, 2026

Fine-tuning the Size and Minimizing the Noise of Solid-state Nanopores
09:43

Fine-tuning the Size and Minimizing the Noise of Solid-state Nanopores

Published on: October 31, 2013

Ionic field effect transistors with sub-10 nm multiple nanopores.

Sung-Wook Nam1, Michael J Rooks, Ki-Bum Kim

  • 1Department of Materials Science and Engineering, Seoul National University, Seoul 151-742, Korea.

Nano Letters
|April 29, 2009
PubMed
Summary

Researchers developed a novel method to create sub-10 nm nanopore structures for electrofluidic devices. This technique allows precise control over ionic transport using embedded electrodes, advancing applications like ionic field-effect transistors.

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Last Updated: Jun 23, 2026

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Published on: December 7, 2017

Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrochemistry

Background:

  • Fabricating nanopore structures with controlled diameters is crucial for advanced electrofluidic applications.
  • Existing methods often struggle to achieve sub-10 nm precision reliably.

Purpose of the Study:

  • To present a new fabrication method for electrode-embedded multiple nanopore structures with sub-10 nm diameters.
  • To enable precise manipulation of ionic transport for electrofluidic devices.

Main Methods:

  • Utilizing electron-beam lithography for initial pore patterning on membranes.
  • Employing a self-limiting atomic layer deposition process to shrink pore diameters to sub-10 nm.

Main Results:

  • Successfully reduced 70-80 nm diameter pores to sub-10 nm.
  • Demonstrated efficient manipulation of potassium chloride (KCl) electrolyte ionic transport via embedded electrodes.

Conclusions:

  • The developed method offers a viable route to fabricate precisely controlled nanopore structures.
  • Electrode-embedded nanopores show significant potential for electrofluidic applications, including ionic field-effect transistors.