US 8,007,756 B2 · 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

Abstract

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 M6CyHz, 8.2<y+z≦10, where M is a transition metal (Mo, W, Ta, Nb), C is a chalcogen (S, Se, Te), H is a halogen (I).

Claims32

Dependent claims

A process for the synthesis of any one of nanotubes of a transition metal dichalcogenide, fullerene-like nanostructures of a transition metal dichalcogenide, and nanotubes of a transition metal dichalcogenide, filled with fullerene-like nanostructures of a transition metal dichalcogenide, the process comprising exposing a quasi one-dimensional material to at least one reagent comprising a chalcogen to chemically transform the quasi one-dimensional material having a diameter less than about one micrometer, the material having a formula M6CyHz, 8.2<y+z≦10, where M comprises a transition metal selected from Mo, W, Ta, and Nb, C comprises a chalcogen selected from S, Se, and Te, and H comprises a halogen comprising I.

A process for a synthesis of a transition metal dichalcogenide comprising exposing a quasi one-dimensional material to at least one reagent comprising a chalcogen to transform the quasi one-dimensional material to any one of a nanotube of a transition metal dichalcogenide;

a fullerene-like nanostructure of a transition metal dichalcogenide;
or a fullerene-like nanostructure of a transition metal dichalcogenide within a nanotube of a transition metal dichalcogenide,
wherein the quasi one-dimensional material comprises:
α. a diameter less than about one micrometer;
and
β. a formula comprising M6CyHz, where:
(i) M comprises one of Mo, W, Ta, Nb, or any combination thereof;
(ii) C comprises one of S, Se, Te, or any combination thereof;
(iii) H comprises a halogen comprising I;
and
(iv) a sum (y+z) comprises a sum in the range of about 8.2 to about 10.

8 more elements

A process for the synthesis of a quasi one-dimensional structure comprising:

(a) exposing a quasi one-dimensional material comprising the nanowire, at an elevated temperature, to air or the presence of oxygen for a sufficient time to transform the quasi one-dimensional material comprising the nanowire to a quasi one-dimensional metal oxide;
and
(b) exposing the quasi one-dimensional metal oxide, at an elevated temperature, to a reagent comprising a chalcogen for a sufficient time to transform the quasi one-dimensional metal oxide comprising a transition metal to a quasi one-dimensional structure comprising a transition metal dichalcogenide or fine crystallites of a transition metal dichalcogenide,
wherein the quasi one-dimensional material comprising the nanowire comprises:
α. a diameter less than about one micrometer;
and
β. a formula comprising M6CyHz, where:
(i) M comprises one of Mo, W, Ta, Nb, or any combination thereof;
(ii) C comprises one of S, Se, Te, or any combination thereof;
(iii) H comprises a halogen comprising I;
and
(iv) a sum (y+z) comprises a sum in the range of greater than about 8.2 to about 10 and
wherein the quasi one-dimensional metal oxide comprising a transition metal comprises a formula comprising MOx, where:
(i) M comprises one of Mo, W, Ta, or Nb, or any combination thereof;
(ii) O comprises oxygen;
and
(iii) x comprises from greater than about 0.3 to about 3.

14 more elements

Dependencies are inferred from the claim text.

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

Life of this patent

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

Life of this patent

Abstract

Claims32