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Single-Crystalline Pyramidal TiC Particles Grown by Biphase Diffusion Synthesis.

Qingshan Yang1, Yajie Yang2, Qianyu Gong1

  • 1SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), Suwon Gyeonggi-do 16419, Republic of Korea.

ACS Nano
|May 2, 2022
PubMed
Summary
This summary is machine-generated.

Researchers synthesized single-crystalline pyramid-shaped titanium carbide (TiC) particles using biphase diffusion synthesis. These particles enhanced molybdenum disulfide (MoS2) phototransistors by increasing photocurrent via localized surface plasmonic resonance.

Keywords:
TiCx crystalsgrowth modenanoparticlesphotoresponse enhancementpyramids

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Solid-State Chemistry

Background:

  • Titanium carbide (TiC) is a promising material for electronic applications.
  • Controlling the morphology and size of TiC particles is crucial for optimizing device performance.
  • Existing synthesis methods often lack control over particle shape and scale.

Purpose of the Study:

  • To synthesize single-crystalline pyramid-shaped (SP) TiC particles using a novel method.
  • To investigate the growth mechanisms of SP TiC particles.
  • To explore the application of SP TiC particles in enhancing phototransistor performance.

Main Methods:

  • Biphase diffusion synthesis (BDS) using a copper-titanium stacked substrate.
  • Controlled synthesis in a copper melt to achieve nano- to micrometer scales.
  • Direct observation and plasma treatment to study particle self-assembly and growth modes (dendritic, edge-shared, corner-shared).

Main Results:

  • Successfully synthesized SP TiC particles with exposed {100} planes.
  • Identified dendritic and edge/corner-shared growth modes governing particle formation.
  • Demonstrated a 6-fold photocurrent increase in MoS2 phototransistors decorated with SP TiC particles due to localized surface plasmonic resonance (LSPR).

Conclusions:

  • The BDS method provides a scalable route for synthesizing tailored SP TiC particles.
  • Understanding the growth modes is key to controlling particle morphology.
  • SP TiC particles are effective nanoscale decorations for improving the performance of photodetectors.