FORMATION of NANOTUBES FROM MISFIT-LAYERED COMPOUNDS

Leela Srinivas Panchakarla, Materials and Interfaces, Weizmann Institute of Science, Rehovot, Israel
Gal Radovsky, Materials and Interfaces, Weizmann Institute of Science, Rehovot, Israel
Ronit Popovitz-Biro, Chemical Research Support Department, Weizmann Institute of Science, Rehovot, Israel
Lothar Houben, Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter, Grünberg Institute, Jülich, Germany
Rafal E. Dunin-Borkowski, Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter, Grünberg Institute, Jülich, Germany
Reshef Tenne, Materials and Interfaces, Weizmann Institute of Science, Rehovot, Israel

Nanotubes made from two-dimensional (2D) layered compounds generated significant scientific interest. The driving force of making such nanotubular structures was credited to the minimization of high energy unsaturated rim atoms. “Misfit” layered compounds (MLCs) are considered to be composite structures having general formula of [(MX)_1+x]_m[TX₂]_n, where M is Pb, Sb, Bi, rare earths, etc; T is Ti, V, Cr, Nb, etc. and X is S, Se.[1] After creation of misfit structure, the in-plane (a-b) periodicities of the different slabs are mutually incommensurate along at least one of the directions. MX can be observed as a molecular slice cut from the (001) plane of a distorted rock salt structure, while the TX₂ molecular slab can be considered as a pseudo-hexagonal structure. MLCs demonstrate greater thermoelectric behavior and superconductivity. Here, we would present chemical and structural aspects of the misfit nanotubes. Different synthetic strategies, characterization through microscopic studies of misfit layered nanotubes will be conferred. How the incommensurability of the misfit lattice along with the reactivity of the rim atoms combines to give misfit nanotubes will be presented.[2-4]

References

[1]. G. A. Wiegers, Prog. Solid St. Chem., 24 (1996) 1.

[2]. G. Radovsky, R. Popovitz-Biro, D. G. Stroppa, L. Houben, and R. Tenne

Acc. Chem. Res., 47 (2014) 406.

[3]. L. S. Panchakarla, R. Popovitz-Biro, L. Houben, R. E. Dunin-Borkowski, and

R. Tenne, Angew. Chem., Int. Ed., 53 (2014) 6920.

[4]. L. S. Panchakarla, G. Radovsky, L. Houben, R. Popovitz-Biro, , R. E. Dunin-Borkowski, and R. Tenne, J. Phys. Chem. Lett.5, (2014) 3724.


FORMATION of NANOTUBES FROM MISFIT-LAYERED COMPOUNDS Leela Srinivas Panchakarla, Materials and Interfaces, Weizmann Institute of Science, Rehovot, Israel Gal Radovsky, Materials and Interfaces, Weizmann Institute of Science, Rehovot, Israel Ronit Popovitz-Biro, Chemical Research Support Department, Weizmann Institute of Science, Rehovot, Israel Lothar Houben, Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter, Grünberg Institute, Jülich, Germany Rafal E. Dunin-Borkowski, Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter, Grünberg Institute, Jülich, Germany Reshef Tenne, Materials and Interfaces, Weizmann Institute of Science, Rehovot, Israel Nanotubes made from two-dimensional (2D) layered compounds generated significant scientific interest. The driving force of making such nanotubular structures was credited to the minimization of high energy unsaturated rim atoms. “Misfit” layered compounds (MLCs) are considered to be composite structures having general formula of [(MX)_1+x]_m[TX₂]_n, where M is Pb, Sb, Bi, rare earths, etc; T is Ti, V, Cr, Nb, etc. and X is S, Se.[1] After creation of misfit structure, the in-plane (a-b) periodicities of the different slabs are mutually incommensurate along at least one of the directions. MX can be observed as a molecular slice cut from the (001) plane of a distorted rock salt structure, while the TX₂ molecular slab can be considered as a pseudo-hexagonal structure. MLCs demonstrate greater thermoelectric behavior and superconductivity. Here, we would present chemical and structural aspects of the misfit nanotubes. Different synthetic strategies, characterization through microscopic studies of misfit layered nanotubes will be conferred. How the incommensurability of the misfit lattice along with the reactivity of the rim atoms combines to give misfit nanotubes will be presented.[2-4] References [1]. G. A. Wiegers, Prog. Solid St. Chem., 24 (1996) 1. [2]. G. Radovsky, R. Popovitz-Biro, D. G. Stroppa, L. Houben, and R. Tenne Acc. Chem. Res., 47 (2014) 406. [3]. L. S. Panchakarla, R. Popovitz-Biro, L. Houben, R. E. Dunin-Borkowski, and R. Tenne, Angew. Chem., Int. Ed., 53 (2014) 6920. [4]. L. S. Panchakarla, G. Radovsky, L. Houben, R. Popovitz-Biro, , R. E. Dunin-Borkowski, and R. Tenne, J. Phys. Chem. Lett.5, (2014) 3724.

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