Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing monodisperse germanium nanocrystal by thermolysis

A technology of thermal decomposition and monodispersion, applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the problems of high cost, uneven particle size distribution of nanoparticles, harsh conditions of nanocrystalline materials, etc., and achieve cost Effects of low and high practical value and novel method

Inactive Publication Date: 2006-09-06
ZHEJIANG UNIV
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many methods for preparing Si and Ge nanocrystals have been proposed in the literature, including solid phase evaporation condensation, chemical vapor deposition (CVD), ion implantation, microemulsion method, and methods such as reducing Ge precursors with metal Na, Li, etc. The disadvantages of these methods are that the conditions for preparing nanocrystalline materials are harsh, the cost is high, and the particle size distribution of the obtained nanoparticles is not uniform.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing monodisperse germanium nanocrystal by thermolysis
  • Method for preparing monodisperse germanium nanocrystal by thermolysis
  • Method for preparing monodisperse germanium nanocrystal by thermolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to the preparation process, the air pressure is 1×10 -3 0.47ml of anhydrous GeCl in a Pa vacuum glove box 4 Slowly drop into 4ml of oleylamine, a large amount of heat will be released during the dropwise addition, after the dropwise addition is completed, react at 25°C for 30 minutes, and the obtained product is light yellow gel-like oleylamine germanium. The thermal decomposition process is as follows: 4ml of oleylamine, 4ml of oleic acid, and 16ml of octyl ether are mixed and added into a three-necked flask, and then the flask is heated to 100°C. In another three-necked flask, 2ml of oleylamine germanium and 10ml of octyl ether were mixed and heated to 80°C. Under the conditions of mechanical stirring and argon protection, the mixture of oleylamine germanium and octyl ether was quickly injected into component one through a medical syringe, and the mixture was heated to 290°C at a heating rate of 2°C / min at the same time, and at 290°C The reaction was stopp...

Embodiment 2

[0027] According to the preparation process, the air pressure is 1×10 -3 0.47ml of anhydrous GeCl in a Pa vacuum glove box 4 Slowly drop into 6ml of oleylamine, a lot of heat will be released during the dropwise addition, after the dropwise addition is completed, react at 30°C for 35 minutes, and the obtained product is light yellow gel-like oleylamine germanium. The thermal decomposition process is as follows: 4ml of oleylamine, 4ml of oleic acid, and 30ml of octyl ether are mixed and added into a three-necked flask, and then the flask is heated to 100°C. In another three-necked flask, 2ml of oleylamine germanium and 12ml of octyl ether were mixed and heated to 80°C. Under the conditions of mechanical stirring and argon protection, the mixture of oleylamine germanium and octyl ether was quickly injected into component one through a medical syringe, and the mixture was heated to 297°C at a heating rate of 1.5°C / min, and at 297°C The reaction was stopped after reflux for 4h. ...

Embodiment 3

[0029] According to the preparation process, the air pressure is 1×10 -3 0.47ml of anhydrous GeCl in a Pa vacuum glove box 4 Slowly drop into 8ml of oleylamine, a large amount of heat will be released during the dropwise addition, after the dropwise addition is completed, react at 30°C for 35 minutes, and the obtained product is light yellow gel-like oleylamine germanium. The thermal decomposition process is as follows: 4ml of oleylamine, 4ml of oleic acid, and 20ml of octyl ether are mixed and added into a three-necked flask, and then the flask is heated to 100°C. In another three-necked flask, 2ml of oleylamine germanium and 12ml of octyl ether were mixed and heated to 90°C. Under the condition of mechanical stirring and argon protection, the mixture of oleylamine germanium and octyl ether was quickly injected into component one through a medical syringe, and the mixture was heated to 300 °C at a heating rate of 2 °C / min at the same time, and at 300 °C The reaction was sto...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses the method for preparing monodisperse germanium nanocrystalline with thermal decomposition. The method comprises the following steps: germanium chloride and oil amine carrying out addition reaction, getting the oil amine germanium, at 290Deg.C, inverse flow for 7 hours, and getting Ge nanocrystalline particle enwrapped by surface active agent. According to experiment, find the optimum method for preparing nanocrystalline particle. The method has the advantages of low cost, simple technology, important meaning and high practical value in optical device design and manufacture.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a method for preparing monodisperse germanium nanocrystals by thermal decomposition. Background technique [0002] Semiconductor nanocrystals have received widespread attention in recent years due to their potential applications in optoelectronic devices, photoluminescence, and biological images, and these applications all come from the quantum confinement effect of semiconductor nanocrystals, which improves the optoelectronic properties of semiconductor nanocrystals. size dependence. In the past two decades, semiconducting nanomaterials have played an important role in information technology, electronics, medicine, biotechnology, environment, energy and national security, but a challenging issue is whether they can be controlled Preparation of specific nanoparticles, for example, monodisperse and high-quality nanoparticles of specific shape. Many nanomaterials hav...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/08C22B41/00
Inventor 蒋建中吴海平刘金芳
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com