Submillimeter-Long WS<sub>2</sub> Nanotubes: The Pathway to Inorganic Buckypaper.
basic_science · Level V
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- Record sourced from PubMed, PMID 37805929.
- Also identified by DOI 10.1021/acs.nanolett.3c02783 and PMC identifier 10683059.
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Abstract
WS<sub>2</sub> nanotubes present many new technologies under development, including reinforced biocompatible polymers, membranes, photovoltaic-based memories, ferroelectric devices, etc. These technologies depend on the aspect ratio (length/diameter) of the nanotubes, which was limited to 100 or so. A new synthetic technique is presented, resulting in WS<sub>2</sub> nanotubes a few hundred micrometers long and diameters below 50 nm (aspect ratios of 2000-5000) in high yields. Preliminary investigation into the mechanistic aspects of the two-step synthesis reveals that W<sub>5</sub>O<sub>14</sub> nanowhisker intermediates are formed in the first step of the reaction instead of the ubiquitous W<sub>18</sub>O<sub>49</sub> nanowhiskers used in the previous syntheses. The electrical and photoluminescence properties of the long nanotubes were studied. WS<sub>2</sub> nanotube-based paper-like material was prepared via a wet-laying process, which could not be realized with the 10 μm long WS<sub>2</sub> nanotubes. Ultrafiltration of gold nanoparticles using the nanotube-paper membrane was demonstrated.