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

Nano Letters
Yen-Ting WuWen-Wei Wu

Abstract

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 p...Continue Reading

References

Feb 14, 2007·Nano Letters·Bangzhi LiuSuzanne E Mohney
Apr 15, 2010·Nano Letters·Jeremy M HigginsSong Jin
Jun 21, 2013·Nanoscale Research Letters·Wen-Li ChiuWen-Wei Wu

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