Institut Jozef Stefan

Center Odlicnosti Nanoznanosti in Nanotehnologije - Co Nanocenter

Adolf Jesih

Marko Virsek

Maja Remskar

Miha Kocmur

Ales Mrzel

Andrej Kovic

The object of the invention is the synthesis of threadlike tungsten oxide WO, in the presence of nickel at a temperature lower than 1000&#xb0; C. Represented is a procedure for the synthesis of a highly homogeneous phase of the WOcompound from the vapor phase, in the presence of nickel, by means of a chemical transport method in a closed quartz ampoule. As an alternative example, a procedure is represented for the synthesis of the WOcompound in a through-flow reaction vessel. Both procedures yield electrically conductive threadlike crystals of the WOcompound. The synthesis is performed in vapor phase. Tungsten enters the reaction as a pure phase or via WS, x&#x2248;4, previously synthesized from the elements, and/or the source of tungsten may also be tungsten oxides WO, 0&#x2266;y&#x2266;1. Nickel may enter the reaction via NiI, Ni(OH)and/or atomic nickel.

[object Object]

The object of the invention is a process for the synthesis of nanotubes of transition metal dichalcogenides, of fullerene-like nanostructures of transition metal dichalcogenides, of nanotubes of transition metal dichalcogenides, filled with fullerene-like nanostructures of transition metal dichalcogenides, of quasi one-dimensional structures (nanowires, microwires and ribbons) of transition metal oxides and of quasi one-dimensional structures of transition metal dichalcogenides, consisting of fine crystallites of transition metal dichalcogenides. The process is characterized in that the synthesis occurs by the chemical transformation of quasi one-dimensional compounds with a sub-micron diameter, described by the formula MCH, 8.2&#x3c;y+z&#x2266;10, where M is a transition metal (Mo, W, Ta, Nb), C is a chalcogen (S, Se, Te), H is a halogen (I).

Process for the synthesis of nanotubes and fullerene-like nanostructures of transition metal dichalcogenides, quasi one-dimensional structures of transition metals and oxides of transition metals

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Planina, Slovenia

Adolf Jesih