{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Sreedhara MB"],"funding":["Israel Science Foundation","Perlman Family Foundation"],"pagination":["1838-1853"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC8874355"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["34(4)"],"pubmed_abstract":["Misfit layered compounds (MLCs) MX-TX<sub>2</sub>, where M, T = metal atoms and X = S, Se, or Te, and their nanotubes are of significant interest due to their rich chemistry and unique quasi-1D structure. In particular, LnX-TX<sub>2</sub> (Ln = rare-earth atom) constitute a relatively large family of MLCs, from which nanotubes have been synthesized. The properties of MLCs can be tuned by the chemical and structural interplay between LnX and TX<sub>2</sub> sublayers and alloying of each of the Ln, T, and X elements. In order to engineer them to gain desirable performance, a detailed understanding of their complex structure is indispensable. MLC nanotubes are a relative newcomer and offer new opportunities. In particular, like WS<sub>2</sub> nanotubes before, the confinement of the free carriers in these quasi-1D nanostructures and their chiral nature offer intriguing physical behavior. High-resolution transmission electron microscopy in conjunction with a focused ion beam are engaged to study SmS-TaS<sub>2</sub> nanotubes and their cross-sections at the atomic scale. The atomic resolution images distinctly reveal that Ta is in trigonal prismatic coordination with S atoms in a hexagonal structure. Furthermore, the position of the sulfur atoms in both the SmS and the TaS<sub>2</sub> sublattices is revealed. X-ray photoelectron spectroscopy, electron energy loss spectroscopy, and X-ray absorption spectroscopy are carried out. These analyses conclude that charge transfer from the Sm to the Ta atoms leads to filling of the Ta 5<i>d</i> <sub><i>z</i> <sup>2</sup></sub> level, which is confirmed by density functional theory (DFT) calculations. Transport measurements show that the nanotubes are semimetallic with resistivities in the range of 10<sup>-4</sup> Ω·cm at room temperature, and magnetic susceptibility measurements show a superconducting transition at 4 K."],"journal":["Chemistry of materials : a publication of the American Chemical Society"],"pubmed_title":["Nanotubes from the Misfit Layered Compound (SmS)<sub>1.19</sub>TaS<sub>2</sub>: Atomic Structure, Charge Transfer, and Electrical Properties."],"pmcid":["PMC8874355"],"funding_grant_id":["43535000350000","339/18"],"pubmed_authors":["K Pathak A","Tenne R","Novikov D","Kaplan-Ashiri I","Khadiev A","Sreedhara MB","Houben L","Balema V","Kolibal M","Bukvisova K","Cohen H","Leitus G","Citterberg D","Enyashin AN"],"additional_accession":[]},"is_claimable":false,"name":"Nanotubes from the Misfit Layered Compound (SmS)<sub>1.19</sub>TaS<sub>2</sub>: Atomic Structure, Charge Transfer, and Electrical Properties.","description":"Misfit layered compounds (MLCs) MX-TX<sub>2</sub>, where M, T = metal atoms and X = S, Se, or Te, and their nanotubes are of significant interest due to their rich chemistry and unique quasi-1D structure. In particular, LnX-TX<sub>2</sub> (Ln = rare-earth atom) constitute a relatively large family of MLCs, from which nanotubes have been synthesized. The properties of MLCs can be tuned by the chemical and structural interplay between LnX and TX<sub>2</sub> sublayers and alloying of each of the Ln, T, and X elements. In order to engineer them to gain desirable performance, a detailed understanding of their complex structure is indispensable. MLC nanotubes are a relative newcomer and offer new opportunities. In particular, like WS<sub>2</sub> nanotubes before, the confinement of the free carriers in these quasi-1D nanostructures and their chiral nature offer intriguing physical behavior. High-resolution transmission electron microscopy in conjunction with a focused ion beam are engaged to study SmS-TaS<sub>2</sub> nanotubes and their cross-sections at the atomic scale. The atomic resolution images distinctly reveal that Ta is in trigonal prismatic coordination with S atoms in a hexagonal structure. Furthermore, the position of the sulfur atoms in both the SmS and the TaS<sub>2</sub> sublattices is revealed. X-ray photoelectron spectroscopy, electron energy loss spectroscopy, and X-ray absorption spectroscopy are carried out. These analyses conclude that charge transfer from the Sm to the Ta atoms leads to filling of the Ta 5<i>d</i> <sub><i>z</i> <sup>2</sup></sub> level, which is confirmed by density functional theory (DFT) calculations. Transport measurements show that the nanotubes are semimetallic with resistivities in the range of 10<sup>-4</sup> Ω·cm at room temperature, and magnetic susceptibility measurements show a superconducting transition at 4 K.","dates":{"release":"2022-01-01T00:00:00Z","publication":"2022 Feb","modification":"2025-04-04T12:43:30.831Z","creation":"2025-04-04T12:43:30.831Z"},"accession":"S-EPMC8874355","cross_references":{"pubmed":["35237027"],"doi":["10.1021/acs.chemmater.1c04106"]}}