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Inorganic Nanotubes G. R. Patzke, F. Krumeich, R. Nesper, Angew. Chem. Int.Ed. Engl. 14 (2002) 2447 Semicond. OxidesCarbon- based Chalco. Metallic.

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Presentation on theme: "Inorganic Nanotubes G. R. Patzke, F. Krumeich, R. Nesper, Angew. Chem. Int.Ed. Engl. 14 (2002) 2447 Semicond. OxidesCarbon- based Chalco. Metallic."— Presentation transcript:

1 Inorganic Nanotubes G. R. Patzke, F. Krumeich, R. Nesper, Angew. Chem. Int.Ed. Engl. 14 (2002) 2447 Semicond. OxidesCarbon- based Chalco. Metallic

2 Anisotropic Nanoparticles – Non-Carbon Nanotubes A. L. Ivanovskii, Russian Chemical Reviews 71 (2002) 175 G. Patzke, F. Krumeich, R. Nesper, Angew. Chem. 2002, 114, 2554 R. Tenne, Angew. Chem. 2003, 115, 5280 C.N.R.Rao, M. Nath, Dalton Trans. 2003, 1

3 Tubular Silicate minerals Scrolls of one or more layers But: also closed, concentric cylinders History TEM investigation of the cross-sections of Chrysotile Yada, Acta Crystallogr. A 27 (1971) 659

4 Misfit Layer Structures in Ternary Chalcogenides SEM images of tubular crystals in the system Bi-Nb-S History Landa-Cánovas, Gómez-Herrero, Otero-Díaz, Micron 32 (2001) 491

5 Nanotubes CRYSOTILE, Bi-Nb-S carbon boron nitride (BN, B x C y N z ) boron carbide (B x C) silicon dioxide(amorphous) transition metal oxide(VO x, TiO 2 ) metal sulfide(MoS 2, WS 2, NbS 2, InS, CdS(e) transition metal halide(NiCl 2 ) metal(Au, Ni, Bi, Te)

6 BN Nanotubes

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8 BC x Nanotubes

9 B-C-N Nanotubes

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11 Nanotubes of Layered Materials MoS 2 WS 2

12 Nanotubes of Dichalcogenides– MoX 2 MoS 2 WS 2 Tenne, Margulis, Genut, Hodes, Nature 360 (1992) 444

13 Nanotubes of Dichalcogenides– MoX 2 MoS 2 WS 2 Tenne, Margulis, Genut, Hodes, Nature 360 (1992) 444 MoSe 2 C.N.R. Rao et al, Chem. Commun., 2001, 2236–2237

14 Nanotubes of Dichalcogenides– WX 2 WS 2 Tenne, Margulis, Genut, Hodes, Nature 360 (1992) 444 WSe 2 C.N.R. Rao et al, Chem. Commun., 2001, 2236–2237

15 Nanotubes of Dichalcogenides– W/Nb/X y WS 2 NbSe 2 W-Nb-S x

16 Nanotubes of Dichalcogenides– ReS 2 WS 2 W-Nb-S x

17 Nanotube Tips of Dichalcogenides– WX 2 WS 2

18 “TiO 2 ” Nanotubes Kasuga, Hiramatsu, Hoson, Sekino, Niihara, Langmuir 14, (1998) 3160

19 “TiO 2 ” Nanotubes G. H. Du, Q. Chen, R. C. Che, Z. Y. Yuan, L.-M. Peng, APPLIED PHYSICS LETTERS VOLUME 79 (2001) 3702

20 NiCl 2 Nanotubes Y. R. Hacohen, E. Grunbaum, R. Tenne, J. Sloan, J. L. Hutchison, Nature (London) (1998) Multilayer NT were obtained; their cross-sections were up to ~7 nm, while the lengths were several micrometres. The tubular structures remained stable for a few days. It is assumed 136 that the most interesting applications of such structures may be related to their unusual magnetic characteristics. It should be noted that it is compounds which form phases with quasi-2D structures under equilibrium conditions that are usually considered as potential candidates for the synthesis of NT. CdCl 2 structure types !

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24 Semiconductor Nanotubes

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