High yield production of ultrathin fibroid semiconducting nanowire of Ta2Pd3Se8
High yield production of ultrathin fibroid semiconducting nanowire of Ta2Pd3Se8
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DOI：
10.1007/s12274-020-2784-y
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发表时间：
2020-05-12
期刊：
影响因子：
9.9
通讯作者：
Wei, Jiang
中科院分区：
文献类型：
--
作者：
Liu, Xue;Liu, Sheng;Wei, Jiang
在各种二维（2D）范德华（vdW）晶体机械剥离制备的高质量电子性能的演示之后，许多方法已经被报道探索和控制大规模制造。与近年来二维原子层状晶体的制备进展相比，厚度接近分子或原子水平的一维纳米线的大规模生产仍然停滞不前。在这里，我们展示了通过液相剥离的方法高产量地生产一维vdW材料，半导体Ta2Pd3Se8纳米线。目前最薄的纳米线约为1纳米，相当于一束或两条分子带。透射电子显微镜（TEM）和输运测量表明，制备的Ta2Pd3Se8纳米线具有意想不到的高结晶度和化学稳定性。我们的低频拉曼光谱揭示了存在弱带间绑定的明确证据。所制备的纳米线晶体管具有良好的开关性能，在光电探测器中具有广阔的应用前景。
Immediately after the demonstration of the high-quality electronic properties in various two dimensional (2D) van der Waals (vdW) crystals fabricated with mechanical exfoliation, many methods have been reported to explore and control large scale fabrications. Comparing with recent advancements in fabricating 2D atomic layered crystals, large scale production of one dimensional (1D) nanowires with thickness approaching molecular or atomic level still remains stagnant. Here, we demonstrate the high yield production of a 1D vdW material, semiconducting Ta2Pd3Se8 nanowires, by means of liquid-phase exfoliation. The thinnest nanowire we have readily achieved is around 1 nm, corresponding to a bundle of one or two molecular ribbons. Transmission electron microscopy (TEM) and transport measurements reveal the as-fabricated Ta2Pd3Se8 nanowires exhibit unexpected high crystallinity and chemical stability. Our low-frequency Raman spectroscopy reveals clear evidence of the existing of weak inter-ribbon bindings. The fabricated nanowire transistors exhibit high switching performance and promising applications for photodetectors.