4.8 Article

Single-Crystalline Pyramidal TiCx Particles Grown by Biphase Diffusion Synthesis

期刊

ACS NANO
卷 16, 期 5, 页码 7713-7720

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c11524

关键词

TICx crystals; pyramids; nanoparticles; growth mode; photoresponse enhancement

资金

  1. National Research Foundation of Korea (NRF) - Korean government (MSIT) [2021R1A2C2007141]
  2. Institute for Basic Science [IBS-R011-D1]
  3. Advanced Facility Center for Quantum Technology
  4. National Research Foundation of Korea [2021R1A2C2007141] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

向作者/读者索取更多资源

In this study, single-crystalline pyramid-shaped TiCx particles were synthesized using a biphase diffusion synthesis method. The growth mode of the particles and their application in photodevices were investigated. The results showed that the TiCx particles exhibited a dendritic growth mode and could enhance the photocurrent through localized surface plasmonic resonance effect.
In this study, we present single-crystalline pyramid-shaped (SP) TiCx particles synthesized on a stacked melt (copper)-solid (titanium) substrate using a biphase diffusion synthesis (BDS) method, in which different sizes ranging from nano- to micrometer scale were obtained within the copper melt with the {100} planes exposed to air. Direct observation and further plasma treatment of the pyramids at different self-assembly stages facilitated the investigation of their growth mode, especially in the horizontal plane. The dendritic growth mode along with the edge and corner-shared modes of the SP TiCx particles frozen on the copper surface was investigated. With SP TiCx particles stacked on top, MoS2-based phototransistors exhibited an up to 6-fold photocurrent increase under laser illumination at different wavelengths, which was attributed to the localized surface plasmonic resonance (LSPR) effect. The BDS method is applied for the synthesis of SP TiCx particles, with a detailed investigation of the relevant growth mode and related applications, such as decoration for high-performance photodevices.

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