Synthesis of Arrayed Tungsten Disulfide Nanotubes.
basic_science · Level V
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- Record sourced from PubMed, PMID 39404498.
- Also identified by DOI 10.1021/acs.nanolett.4c03895.
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Abstract
Tungsten disulfide nanotubes (WS<sub>2</sub>-NTs), with their cylindrical structure composed of rolled WS<sub>2</sub> sheets, have attracted much interest because of their unique physical properties reflecting quasi-one-dimensional chiral structures. They exhibit a semiconducting electronic structure regardless of their chirality, and various semiconducting and optoelectronic device applications have been demonstrated. The development of techniques to fabricate arrayed WS<sub>2</sub>-NTs is crucial to realizing the highest device performance. Since the discovery of WS<sub>2</sub>-NTs, various synthesis techniques have been reported; however, horizontally arrayed WS<sub>2</sub>-NTs have never been successfully synthesized. Here, we demonstrate a simple technique to synthesize arrayed WS<sub>2</sub>-NTs. Through precise temperature and gas control, W<sub>18</sub>O<sub>49</sub> nanowires are grown along the [1̅101] direction on an r-plane sapphire substrate, and the nanowires are converted into nanotubes via sulfurization under optimized conditions. The demonstrated synthesis technique for arrayed WS<sub>2</sub>-NTs will play a central role in the fabrication of devices using transition-metal dichalcogenide nanotubes.