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Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
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Two-Dimensional Tellurium: Progress, Challenges, and Prospects.

Zhe Shi1, Rui Cao1, Karim Khan1,2

  • 1Institute of Microscale Optoelectronics, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ), Shenzhen University, Shenzhen, 518060, Guangdong, People's Republic of China.

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Summary
This summary is machine-generated.

Two-dimensional tellurium (2D Te) exhibits unique properties for nanodevices. This review covers 2D Te nanoflake synthesis, properties, and applications, highlighting future research directions.

Keywords:
2D materialsEnergy harvestingLogic gate and circuitsPhotodetectorsSolar cellsTellurium

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Condensed Matter Physics

Background:

  • Two-dimensional (2D) tellurium (Te) emerged in 2017.
  • It possesses unique thickness-dependent bandgap, environmental stability, piezoelectricity, high carrier mobility, and photoresponse.
  • These properties suggest potential in photodetectors, transistors, and energy harvesting.

Purpose of the Study:

  • To review recent research progress on 2D Te nanoflakes.
  • To consolidate knowledge on synthesis, properties, and applications.
  • To identify challenges and future research directions for 2D Te.

Main Methods:

  • Literature review of 2D Te nanoflake research.
  • Analysis of synthesis techniques.
  • Compilation of reported physical properties and device applications.

Main Results:

  • 2D Te exhibits tunable electronic and optoelectronic properties.
  • Various synthesis methods have been developed for 2D Te nanoflakes.
  • Demonstrated applications include field-effect transistors and photodetectors.

Conclusions:

  • 2D Te is a promising material for next-generation nanodevices.
  • Further research is needed to overcome current challenges.
  • Advancements in 2D Te nanoflakes could lead to significant industrial innovations in nanodevice commercialization.