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Quasi-one-dimensional polymers based on the metal-chalcogen-halogen system

A technology of chalcogen and halogen, applied in molybdenum compounds, tungsten compounds, nanotechnology for materials and surface science, etc., can solve problems such as instability and unsuitability for nanofiber or nanowire applications

Inactive Publication Date: 2007-01-03
INSTITUT JOZEF STEFAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fibers so produced can be stabilized by solvated ions in solution, but they are unstable in air and are virtually unsuitable for application as individual nanofibers or nanowires.

Method used

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  • Quasi-one-dimensional polymers based on the metal-chalcogen-halogen system
  • Quasi-one-dimensional polymers based on the metal-chalcogen-halogen system
  • Quasi-one-dimensional polymers based on the metal-chalcogen-halogen system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] synthesis

[0085] The synthesis was carried out in a sealed vacuum quartz ampule with a diameter of 19 mm and a length of 140 mm containing flake Mo metal (Aldrich, 0.1 mm thick molybdenum foil, 99.9+%), S (Aldrich, sulfur powder, 99.98 %) and I 2 (Aldrich, 99.999+%), the amount is 6:4:6 (Mo: 0.8925g, S: 0.1988g, I 2 : 1.1805g). The ampoule was placed in a single-zone furnace (LINDBERG STF 55346C) and heated from room temperature to 1070°C at a rate of 8K / h. This temperature remained stable for 72 hours. The ampoule was subsequently cooled at 1.5 K / min. The resulting material contained substantial amounts of material in the form of fur-like material ( figure 2 ), on which a closer observation found that the stoichiometric Mo 6 S 3 I 6 material rope.

[0086] composition

[0087] The composition determined by EA (Elemental Analysis) is Mo 6 S 3 I 6 .

[0088] Found values, %: Mo 40.4; S 6.4; I 53.1. (measurement tolerance ±0.2-0.3%)

[0089] Mo 6 S 3 ...

Embodiment 2

[0094] synthesis

[0095] Synthesis was performed in sealed vacuum quartz ampoules (19 mm diameter, 140 mm length) containing flake Mo metal (Aldrich, 0.1 mm thick molybdenum foil, 99.9+%), S (Aldrich, sulfur powder, 99.98%) and I 2 (Aldrich, 99.999+%), its amount is 6:4:4 (Mo: 0.8981g, S: 0.2000g, I 2 : 0.7919g). The ampoule was placed in a single zone furnace (LINDBERG STF 55346C) and heated from room temperature to 1150°C at a rate of 8K / h. This temperature remained stable for 72 hours. The ampoule was subsequently cooled at 1.5 K / min. The resulting material contained substantial amounts of material in the form of fur-like material ( figure 2 ), on which a closer observation found that the stoichiometric Mo 6 S 4.5 I 4.5 material rope.

[0096] composition

[0097] The composition determined by EA (Elemental Analysis) is Mo 6 S 4.5 I 4.5 .

[0098] Found values, %: Mo 43.5; S 11.2; Io 45.3. (measurement tolerance ±0.3%)

[0099] Mo 6 S 4.5 I 4.5 Calculat...

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Abstract

The present invention relates a quasi-one-dimensional material with sub-micron cross-section described by the formula M6CyHz, where the M = transition metal, C = chalcogen, H = halogen, and where y and z are integers such that 8.2 C01G 39 / 00 C01G 41 / 00 C01G 1 / 00 15 16 4 2004 / 2 / 25 1890182 2007 / 1 / 3 000000000 Inst Stefan Josef Slovenia Jesih Adolf Mihailovic Dragan Remskar Maja Mrzel Ales Vrbanic Daniel gu jinwei liu jifu 11227 European 2003 / 12 / 8 03028188.5 2006 / 6 / 8 PCT / EP2004 / 001870 2004 / 2 / 25 WO2005 / 058758 2005 / 6 / 30 English

Description

technical field [0001] The present invention relates to the synthesis of air-stable, monodisperse quasi-one-dimensional materials with submicron cross-sections, and the chemical formula M 6 C y h z Expression where M=transition metal, C=chalcogen, H=halogen, and where y and z are real numbers such that 8.2<(y+z)<10. These materials can be synthesized in a one-step process at temperatures above 1000°C. The invention also relates to the use of these materials in electronic, chemical, optical or mechanical applications. Background technique [0002] Carbon nanotubes as reported by Ijima (I. Ijima, Nature 56 (1991), 354) have many functional properties that make them important in many different applications ranging from nanoelectronics to composite materials components such as chemical and nanoelectromechanical sensors and many other devices (R.H. Baughman, A.A. Zakhidovand Walt A.de Heer, Science 297 (2002), 789). Carbon nanotubes are typically synthesized in such a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/00C01G41/00C01G1/00H01J9/02
CPCC01P2004/10C01P2004/16C01G1/00C01P2004/64B82Y30/00C01P2004/04C01P2004/03C01G41/006H01J9/025C01P2006/80C01G39/006C01G41/00C01G39/00B82Y40/00
Inventor 阿道夫·耶西赫德拉甘·米哈伊洛维奇马亚·雷姆斯卡阿莱斯·姆尔泽丹尼尔·弗尔巴尼克
Owner INSTITUT JOZEF STEFAN