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Monodisperse C* nano unit crystal material and method for preparing same

A nano-single-crystal, monodisperse technology, applied in the direction of polycrystalline material growth, single crystal growth, single crystal growth, etc., can solve problems such as disorder, difficulty, and lack of high crystallinity, and achieve a promising, Simple operation effect

Inactive Publication Date: 2009-10-07
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently about C 70 The preparation method of nanometer single crystal is rarely reported. The early method is to use the template method to enter the alumina template into the C 70 solution, prepared by heating and removing the template process such as C 70 nanowires, but this method cannot obtain samples of high purity and crystallinity (Chem.Commun., 541, 2001)
Adopt liquid-liquid interface method (J.Mater.Res., Vol.20,32005) in the existing report, by isopropanol and C 70 The interface formed by the pyridine saturated solution was left to stand for 7 days, and tubular C with different diameters and sizes were obtained. 70 fiber, high crystallinity of C 70 Nano-single crystal, the sample has great disorder, cannot be well controlled to a smaller size range, and is entangled, which poses difficulties whether it can be applied or further studied

Method used

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  • Monodisperse C* nano unit crystal material and method for preparing same
  • Monodisperse C* nano unit crystal material and method for preparing same
  • Monodisperse C* nano unit crystal material and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 provides a specific preparation granular C 70 Examples of nano single crystals.

[0028] Choose saturated C 70 Meta-xylene solution was used as the mother liquor, and methanol was selected as the shape regulator. Will C 70 The saturated m-xylene solution and methanol were mixed with each other at a volume ratio of 1:8, added to a glass weighing bottle, ultrasonically oscillated for 30 seconds, and left to stand at room temperature for 2 hours. Use a rubber dropper to suck out the sediment at the bottom of the container, drop it on a substrate such as a silicon wafer or a glass wafer, and naturally volatilize the solvent and shape regulator at room temperature, and then obtain granular C with a diameter of 200-300 nm on the substrate. 70 nanocrystals. at 10 -5 Under the pressure of Pa, at a temperature of 120 ° C, the solvent is removed by heating to obtain C with a face-centered cubic structure. 70 Nanoparticles are single crystals that remain unchang...

Embodiment 2

[0029] Embodiment 2 provides a specific preparation granular C 70 Examples of nano single crystals.

[0030] Choose saturated C 70 The m-xylene solution is used as the mother liquor, and n-butanol is used as the shape regulator. Will C 70 A saturated solution of m-xylene and n-butanol were mixed with each other at a volume ratio of 1:10, added to a glass weighing bottle, ultrasonically oscillated for 60 seconds, and left to stand at room temperature for 5 hours. Use a rubber dropper to suck out the sediment at the bottom of the container, drop it on a substrate such as a silicon wafer or a glass sheet, and naturally volatilize the solvent and shape regulator at room temperature, and then obtain granular C with a diameter of 400-600 nm on the substrate. 70 nanocrystals. at 10 -5 Under the pressure of Pa, at a temperature of 150 ° C, the solvent is removed by heating to obtain granular C with a face-centered cubic structure. 70 Nano single crystal, shape and size remain un...

Embodiment 3

[0031] Embodiment 3 provides a specific preparation granular C 70 Examples of nano single crystals.

[0032] Choose saturated C 70 The m-xylene solution is used as the mother liquor, and n-amyl alcohol is used as the shape regulator. Will C 70 Saturated m-xylene solution and n-amyl alcohol were mixed with each other at a volume ratio of 1:10, added to a glass weighing bottle, ultrasonically oscillated for 30 seconds, and left to stand at room temperature for 10 hours. Use a rubber dropper to suck out the sediment at the bottom of the container, drop it on a substrate such as a silicon wafer or a glass sheet, and naturally volatilize the solvent and shape regulator at room temperature, and then obtain granular C with a diameter of 400-600 nm on the substrate. 70 nanocrystals. at 10 -5 Under the pressure of Pa, at a temperature of 140 ° C, the solvent is removed by heating to obtain granular C with a face-centered cubic structure. 70 Nano single crystal, shape and size rem...

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Abstract

The present invention provides a monodisperse C70 nano unit crystal material and a method for preparing same which belong to the technic field for preparing unit crystal material. The C70 nano unit crystal material has granular, bar or pipe shape with face-centred cubic structure. A saturated C70 meta-xylene solution is used as mother liquor, straight-chain saturated monohydric alcohol with various type is used as shape regulating agent. The preparing method includes steps as follows: mixing the mother liquor and the shape regulating agent, ultrasound shocking, standing, taking defecation scum on a basal lamina, volatilizing dissolvant and shape regulating agent naturally in room temperature and obtaining C70 nano crystal; then heating for removing dissolvant under pressure intensity 10(-5) and obtaining the product. The method can prepare C70 nano unit crystal material with granular shape, bar shape and pipe shape with regular size and shape; the product shape can be controlled accurately; the method is simple; the product provides an effective purpose for the nano device application which has better application prospect.

Description

technical field [0001] The invention belongs to the technical field of single crystal material preparation, in particular to different shapes of C 70 Preparation method of nano single crystal. Background technique [0002] C 70 It was first discovered in 1985 by scientists such as Kroto (Nature, Vol. 318, 162, 1985), and then improved and mass-produced by scientists such as Kratschmer (Nature, Vol. 347, 354, 1990). C 70 It is a semiconductor material with a band gap of 1.8eV, C 70 It has excellent photophysical, photoconductive and electrical conductivity properties. C 70 Nanomaterials have huge potential application value in nanodevices, which leads to the preparation of different shapes of C 70 crystals, especially C 70 Single crystal has become a research hotspot and the goal of efforts. [0003] Currently about C 70 The preparation method of nanometer single crystal is rarely reported. The early method is to use the template method to enter the alumina template ...

Claims

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Application Information

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IPC IPC(8): C30B29/02C30B7/06
Inventor 刘冰冰刘德弟崔雯邹广田
Owner JILIN UNIV
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