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MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

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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...
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Schottky Barrier Diode01:27

Schottky Barrier Diode

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Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...
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An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
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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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In semiconductor devices, diodes play a crucial role in directing current flow, and its operation is primarily categorized into forward bias and reverse bias. A diode is said to be forward-biased when its p-type region is connected to the positive terminal of a battery and its n-type region is linked to the negative terminal. This configuration reduces the potential barrier within the diode, allowing current to flow easily from the p to the n-type region.
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オリエンテッド・エクステリア・フィールドで制御されるフラーレンベースのスイッチング分子ダイオード

Adam Jaroš1,2, Esmaeil Farajpour Bonab3,4, Michal Straka1

  • 1Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences , Flemingovo nám. 2 , CZ-16610 Prague , Czech Republic.

Journal of the American Chemical Society
|November 21, 2019
PubMed
まとめ

フラーレンのスイッチングダイオード (FSD) を開発しました 適用された電場は分子指向を制御し,電圧制御されたスイッチングとデータ読み書き操作を可能にします.

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科学分野:

  • 分子電子
  • ナノテクノロジー
  • 材料科学

背景:

  • 分子ダイオードは高度なデータ保存と処理に不可欠です.
  • 固体フルレンは分子装置の製造のためのユニークなプラットフォームを提供します.

研究 の 目的:

  • 極性分子 (MX@C70) を封じ込めるエンドヘッダルフルレンに基づくフルレンスイッチングダイオード (FSD) を提案し,研究する.
  • これらの分子ダイオードの電圧制御されたスイッチングとデータ保存能力を実証する.

主な方法:

  • マルチスケール・シリコ・モデリング
  • 密度関数理論と非均衡グリーン関数 (DFT-NEGF) の計算を組み合わせた.
  • 外部電場下で2つまたは4つの端末の電極を持つMX@C70システムのシミュレーション.

主要な成果:

  • 外部電場は,C70ケージ内のカプセル化されたMX分子の方向を制御することができます.
  • MX@C70システムの伝導性は,電極に対するMX方向性に依存する.
  • 伝導状態の間の電圧誘発のスイッチングが示され,分子メミストーに類似しています.

結論:

  • MX@C70システムは,電圧に敏感なスイッチング分子ダイオードとして機能します.
  • 封装された分子の方向性は,適用された電圧を使用して書き読めます.
  • これらのフルレンのスイッチングダイオードは 分子データの保存と処理アプリケーションに希望を示しています