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Preparation method of PbTe colloid nanocrystalline self-assembly film

A nanocrystal and self-assembly technology, which is applied to devices, coatings, and binary selenium/tellurium compounds that coat surfaces with liquids. Effect

Inactive Publication Date: 2011-07-27
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • 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 octadecene and react at 130°C until PbO disappears to prepare 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 octadecene and react at 130°C until PbO disappears to prepare 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 octadecene 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...

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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 PbTecolloid 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

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Application Information

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Patent Type & Authority Patents(China)
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
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