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

Preparation method of PbTe colloid nanocrystalline self-assembly film

A nanocrystalline self-assembly technology, which is applied in the direction of surface coating liquid devices, coatings, binary selenium/tellurium compounds, etc., can solve problems affecting the surface uniformity of nanocrystalline self-assembled films, and achieve the goal of preventing oxidation Effect

Inactive Publication Date: 2010-09-15
XI AN JIAOTONG UNIV
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, after the solvent evaporates, the nanocrystal solution will remain on the substrate, which will affect the uniformity of the surface of the nanocrystal self-assembled film.

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
  • Preparation method of PbTe colloid nanocrystalline self-assembly film
  • Preparation method of PbTe colloid nanocrystalline self-assembly film
  • Preparation method of PbTe colloid nanocrystalline self-assembly film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Under the protection of Ar gas and magnetic stirring, dissolve PbO and oleic acid in octadecane and react at 130°C until PbO disappears to produce a colorless and transparent lead oleate solution with a lead ion concentration of 0.05mol / l. Wherein PbO: the mol ratio of oleic acid=1: 2.5;

[0023] 2) Under the protection of Ar gas and magnetic stirring, dissolve tellurium powder in trioctylphosphorus, heat in a water bath at 70°C until the black tellurium powder disappears completely, and make trioctyl with a tellurium ion concentration of 0.1mol / l tellurium solution;

[0024] 3) Take the lead oleate solution and heat it to 180°C, then add the trioctyl tellurium solution to the lead oleate solution and react for 5 seconds to obtain a mixed solvent, wherein the lead oleate solution and the trioctyl tellurium solution have a ratio of Pb:Te=2:1 The molar ratio of;

[0025]4) Move the mixed solvent to an oil bath at 150°C for 30 seconds and then place it in a cold water...

Embodiment 2

[0030] 1) Under the protection of Ar gas and magnetic stirring, dissolve PbO and oleic acid in octadecane and react at 130°C until PbO disappears to produce a colorless and transparent lead oleate solution with a lead ion concentration of 0.05mol / l. Wherein PbO: the mol ratio of oleic acid=1: 2.5;

[0031] 2) Under the protection of Ar gas and magnetic stirring, dissolve tellurium powder in trioctylphosphorus, heat in a water bath at 70°C until the black tellurium powder disappears completely, and make trioctyl with a tellurium ion concentration of 0.1mol / l tellurium solution;

[0032] 3) Take the lead oleate solution and heat it to 180°C, then add the trioctyl tellurium solution to the lead oleate solution and react for 5 seconds to obtain a mixed solvent, wherein the lead oleate solution and the trioctyl tellurium solution have a ratio of Pb:Te=2:1 The molar ratio of;

[0033] 4) Move the mixed solvent to an oil bath at 150°C for 30 seconds and then place it in a cold wate...

Embodiment 3

[0038] 1) Under the protection of Ar gas and magnetic stirring, dissolve PbO and oleic acid in octadecane and react at 150°C until PbO disappears to prepare a colorless and transparent lead oleate solution with a lead ion concentration of 0.1mol / l. Wherein PbO: the mol ratio of oleic acid=1: 4;

[0039] 2) Under the protection of Ar gas and magnetic stirring, dissolve tellurium powder in trioctylphosphorus, heat in a water bath at 60°C until the black tellurium powder disappears completely, and make trioctyl with a tellurium ion concentration of 0.3mol / l tellurium solution;

[0040] 3) Take the lead oleate solution and heat it to 150°C, then add the trioctyl tellurium solution to the lead oleate solution and react for 50s to obtain a mixed solvent, wherein the lead oleate solution and the trioctyl tellurium solution have a ratio of Pb:Te=1:5 The molar ratio of;

[0041] 4) Move the mixed solvent to an oil bath at 100°C for 100 seconds and then place it in a cold water bath t...

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

PropertyMeasurementUnit
Concentrationaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Concentrationaaaaaaaaaa
Login to View More

Abstract

The invention relates to a preparation method of a PbTe colloid nanocrystalline self-assembly film driven by constant temperature, constant pressure and constant load air flow, belonging to the field of preparation of ordered nano films by using rheotaxy, and the ordered nano film material is an important material for the development of new technologies of electronics, information, biology, and the like. The method comprises the following steps of: dispersing colloid nanocrystalline in a constant temperature, constant pressure and constant load air flow deposition device filled with a mixed solvent, wherein the colloid nanocrystalline is monodisperse PbTe colloid nanocrystalline prepared by adopting a colloid chemical method; driving the colloid nanocrystalline to carry out self-assembly by utilizing bath temperature and carrier air flow; assembling the colloid nanocrystalline on a Si wafer substrate to form a PbTe nanocrystalline film layer; and then clearing away residual liquid on the surface of the film by utilizing a high-speed film throwing technology. The thickness of the film layer can be effectively controlled through controlling the deposition time, and the prepared PbTe colloid nanocrystalline self-assembly film has uniform and consistent surface and is highly ordered. A tool in the invention for controlling solution evaporation has simple structure, low cost, simple and convenient operation and effective method.

Description

technical field [0001] The invention belongs to the field of preparing ordered nano-films by liquid phase epitaxy, and in particular relates to a method for preparing PbTe colloidal nano-crystal self-assembled films driven by constant temperature, constant pressure and constant load air flow. Background technique [0002] Ordered nanofilms are important materials for the development of new technologies such as electronics, information, and biology, and play a decisive role in the revolutionary development of future information technology, biotechnology, and electronic technology. PbTe colloidal nanocrystals are based on the colloidal chemical synthesis method of II-VI colloidal nanocrystals, that is, Pb compounds and Te powder are respectively dissolved in appropriate organic solvents, and after mixing, high-temperature nucleation and low-temperature growth methods are used to prepare different particle sizes. and properties of PbTe colloidal nanocrystals. (See J.E. Murphy,...

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
IPC IPC(8): C01B19/04B05D1/18B05C11/08
Inventor 汪敏强林忠海薛耀辉魏立卓郑中华姚熹
Owner XI AN JIAOTONG 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