Procedure for Synthesis of Quasi One-Dimensional Structures of Dichalcogenides and Transition Metal Oxides

Publication Number: SI22623A
Application Date: 25. 9. 2007
Assignee/Applicant: Jožef Stefan Institute [SI]
Inventor: Adolf Jesih, Aleš Mrzel, Maja Remškar, Marko Viršek
Title: Postopek za sintezo kvazi enodimenzionalnih struktur dihalkogenidov in oksidov prehodnih kovin [SL], Procedure for Synthesis of Quasi One-Dimensional Structures of Dichalcogenides and Transition Metal Oxides [EN]
Description: The subject of invention is a procedure for synthesis of quasi one-dimensional structures, i.e. nanowires, microwires and tapes of metal oxides of transition metals and quasi one-dimensional structures of transition metal dichalcogenides composed of fine crystallites of transition metal dichalcogenides. The reaction is run by the chemical reaction of quasi one-dimensional materials consisting of nanowires with a diameter below one micrometre, described with the formula M6CyHz, where y+z is greater than 8.2 and smaller or equal to 10, where M is a transition metal (Mo,W, Ta, Nb), C is a chalcogen (S, Se, Te)and H is a halogen (I), where the said quasi one-dimensional material is first heated in the air or otherwise in the presence of oxygen at an elevated temperature and is transformed into quasi one-dimensional metal oxides of transition metals, described with the formula MOx, where x is greater than 0.3 and smaller or equal to 3, where M is a transition metal (Mo,W, Ta, Nb) and O is oxygen; then a chemical transformation of the said quasi one-dimensional metal oxides follows in a quartz tube with a gas comprising an active reagent containing a chalcogen; the transformation takes place at an elevated temperature at which the active regent, containing a chalcogenide, exists in the vapour phase.
Drawings:
Category: Nanotechnology and New Materials
Technology application codes: Physical and exact sciences
Market application codes: Industrial products, Other
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