Nickel/Platinum Dual Silicide Axial Nanowire Heterostructures with Excellent Photosensor Applications

Yen Ting Wu, Chun Wei Huang, Chung Hua Chiu, Chia Fu Chang, Jui Yuan Chen, Ting Yi Lin, Yu Ting Huang, Kuo-Chang Lu, Ping Hung Yeh, Wen Wei Wu

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Transition metal silicide nanowires (NWs) have attracted increasing attention as they possess advantages of both silicon NWs and transition metals. Over the past years, there have been reported with efforts on one silicide in a single silicon NW. However, the research on multicomponent silicides in a single silicon NW is still rare, leading to limited functionalities. In this work, we successfully fabricated β-Pt2Si/Si/θ-Ni2Si, β-Pt2Si/θ-Ni2Si, and Pt, Ni, and Si ternary phase axial NW heterostructures through solid state reactions at 650 °C. Using in situ transmission electron microscope (in situ TEM), the growth mechanism of silicide NW heterostructures and the diffusion behaviors of transition metals were systematically studied. Spherical aberration corrected scanning transmission electron microscope (Cs-corrected STEM) equipped with energy dispersive spectroscopy (EDS) was used to analyze the phase structure and composition of silicide NW heterostructures. Moreover, electrical and photon sensing properties for the silicide nanowire heterostructures demonstrated promising applications in nano-optoeletronic devices. We found that Ni, Pt, and Si ternary phase nanowire heterostructures have an excellent infrared light sensing property which is absent in bulk Ni2Si or Pt2Si. The above results would benefit the further understanding of heterostructured nano materials.

Original languageEnglish
Pages (from-to)1086-1091
Number of pages6
JournalNano Letters
Issue number2
Publication statusPublished - 2016 Feb 10

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


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