Journal
NANO RESEARCH
Volume 13, Issue 6, Pages 1627-1635Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-020-2784-y
Keywords
van der Waals nanowire; 1D semiconductor; liquid exfoliation; micro Raman spectroscopy; electronic and optoelectronic device
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Funding
- United States Department of Energy [DE-SC0014208]
- National Science Foundation [1752997]
- Russian Science Foundation [17-72-20223]
- Ministry of Education and Science of the Russian Federation [14.Y26.31.0005]
- Russian Science Foundation [17-72-20223] Funding Source: Russian Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1752997] Funding Source: National Science Foundation
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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.
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