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Related Concept Videos

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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...
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Consider two point charges, each exerting Coulomb force on the other. It is possible to describe the Coulomb interaction via an intermediate step by defining a new physical quantity called the electric field.
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An important distinction exists between the electric field induced by a changing magnetic field and the electrostatic field produced by a fixed charge distribution. Specifically, the induced electric field is nonconservative because it does not work in moving a charge over a closed path. In contrast, the electrostatic field is conservative and does no net work over a closed path. Hence, electric potential can be associated with the electrostatic field but not the induced field. The following...
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Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection
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Towards graphane field emitters.

Shuyi Ding1, Matthew T Cole2, Chi Li3

  • 1Display R&D Center , School of Science and Engineering , Southeast University , Nanjing 210096 , P. R. China . Email: lw@seu.edu.cn; School of Information Engineering , Nanjing Normal University Taizhou Collage , Taizhou , 225300 , P. R. China.

RSC Advances
|January 10, 2017
PubMed
Summary
This summary is machine-generated.

Hydrogen plasma treatment significantly enhances graphene foam (GF) field emission. This method improves electron emission by creating defects and a graphane-like material, boosting performance for nanocarbon devices.

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Area of Science:

  • Materials Science
  • Surface Science
  • Nanotechnology

Background:

  • Graphene foam (GF) is a promising material for field emission applications.
  • Optimizing GF for enhanced electron emission is crucial for developing advanced electronic devices.

Purpose of the Study:

  • To investigate the effects of transient hydrogen plasma exposure on graphene foam's field emission performance.
  • To elucidate the mechanisms behind the observed enhancements in field emission.

Main Methods:

  • Field emission measurements
  • Fourier transform infrared spectroscopy
  • Plasma spectrophotometry
  • Raman spectroscopy
  • Scanning electron microscopy

Main Results:

  • Hydrogen plasma treatment significantly reduced the turn-on field to 2.5 V μm⁻¹ and increased maximum current density to 8.27 mA cm⁻².
  • Enhanced emission is attributed to increased lattice defects and formation of a partially hydrogenated, graphane-like material.
  • Treatment improved emission spatial uniformity by approximately fourfold.

Conclusions:

  • Transient hydrogen plasma exposure is an effective method for enhancing graphene foam field emission.
  • Engineered lattice degradation and work function adjustment via plasma treatment offer a low-cost route to improved nanocarbon field emitters.