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Related Concept Videos

In-situ Hybridization02:31

In-situ Hybridization

In situ hybridization (ISH) is a technique used to detect and localize specific DNA or RNA molecules in cells, tissue, or tissue sections using a labeled probe. The technique was first used in 1969 for the investigation of nucleic acids. It is currently an essential tool in scientific research and clinical settings, especially for diagnostic purposes.
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Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...
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Related Experiment Video

Updated: Jun 14, 2026

Seeded Synthesis of CdSe/CdS Rod and Tetrapod Nanocrystals
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Growth and Electrical Characterization of Hybrid Core/Shell InAs/CdSe Nanowires.

Mane Kaladzhian1,2, Nils von den Driesch2,3, Nataliya Demarina4

  • 1Peter Grünberg Institut 9 (PGI 9), Forschungszentrum Jülich, 52425 Jülich, Germany.

ACS Applied Materials & Interfaces
|February 20, 2024
PubMed
Summary
This summary is machine-generated.

We developed hybrid Indium Arsenide (InAs) and Cadmium Selenide (CdSe) core/shell nanowires. These novel structures demonstrate protected electron transport, paving the way for advanced electronic devices.

Keywords:
III−V/II–VI core/shell NWsInAs nanowireNW-based FET deviceselective-area growthtransport properties

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Semiconductor Physics

Background:

  • Core-only Indium Arsenide (InAs) nanowires (NWs) are crucial for optical and electrical devices.
  • Surface effects can degrade the electron transport channel in InAs NWs.

Purpose of the Study:

  • To protect the electron transport channel in InAs NWs using a Cadmium Selenide (CdSe) shell.
  • To investigate the electronic properties of InAs/CdSe core/shell nanowires.

Main Methods:

  • Fabrication of InAs/CdSe core/shell nanowires with optimized growth conditions.
  • Characterization using Atom Probe Tomography (APT) to analyze material diffusion.
  • Fabrication and electrical characterization of field-effect transistors (FETs).
  • Band structure simulations to understand electron transport.

Main Results:

  • Achieved a smooth interface between InAs core and CdSe shell with minimal lattice mismatch.
  • Observed significant Indium diffusion into the CdSe shell, creating remote n-type doping.
  • Demonstrated an electron transport channel within the InAs core, extending into the CdSe shell at higher gate voltages.

Conclusions:

  • Hybrid III-V/II-VI core/shell nanowires offer a promising platform for advanced electronic applications.
  • The CdSe shell effectively protects the InAs electron transport channel.
  • Remote doping enhances the electronic properties of the core/shell system.