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Related Concept Videos

Field Effect Transistor01:29

Field Effect Transistor

567
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...
567

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Preparation of Silicon Nanowire Field-effect Transistor for Chemical and Biosensing Applications
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Gas-Phase Assembly of Semiconductor Nanostructures into Functional Field-Effect Transistors.

Yueqi Zhang1, Yuxiang Yin1, Shirong Liu1

  • 1School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.

Small (Weinheim an Der Bergstrasse, Germany)
|September 1, 2025
PubMed
Summary

A novel gas-phase synthesis and assembly platform creates pure, sub-5-nm semiconductor nanoparticles (NPs). Electric-field-guided 3D nanoprinting precisely assembles these NPs for advanced nanoelectronics.

Keywords:
3D nanoprintingaerosol nanotechnologynanodevicesnanofabricationnanoparticles

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Conventional top-down lithography faces nanoscale limitations in resolution, material choice, and cost.
  • Bottom-up colloidal methods struggle with ligand contamination and precision for integrated circuits.

Purpose of the Study:

  • To develop a gas-phase synthesis and assembly platform for high-purity semiconductor nanoparticles (NPs).
  • To achieve precise 3D assembly of NPs for advanced nanoelectronic applications.

Main Methods:

  • Plasma generation of stabilizer-free semiconductor NPs (Si, Ge, ZnO, In2O3, GaAs, SiC) with sub-5-nm size.
  • Kinetically controlled nucleation in a dilute inert gas stream for monodispersity.
  • Electric-field-guided 3D nanoprinting using coupled gas-flow and electric fields for deterministic NP assembly.

Main Results:

  • Achieved sub-5-nm NPs with high purity and monodispersity.
  • Demonstrated <10-nm alignment precision in assembled NP architectures, surpassing colloidal methods.
  • Fabricated functional field-effect transistors (FETs) with demonstrated gate modulation (ON/OFF ratio: ≈1211) and carrier mobility (8.33 cm2 V−1 s−1).

Conclusions:

  • The gas-phase platform overcomes limitations of conventional and colloidal methods for nanoscale semiconductor fabrication.
  • Ligand-free, dry processing enables high material purity and compatibility with air-sensitive semiconductors.
  • Established a scalable pathway for 3D-printed nanoelectronics and advanced semiconductor nanomaterial synthesis.