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Method for induced growth of DAST and derivative single-crystal film thereof by using self-assembly monomolecular film

A technology for self-assembling single-molecule and single-crystal thin films, applied in the directions of single crystal growth, single crystal growth, crystal growth, etc., can solve the problems of poor crystal thickness and orientation controllability, interference with crystal growth, easy formation of twin crystals, etc. Overcome the poor controllability of thickness and orientation, avoid twinning, and control the effect of orientation

Inactive Publication Date: 2016-11-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to: aim at the problems existing in the prior art, provide a kind of self-assembled monomolecular film induced growth method of DAST and its derivative single crystal thin film, can effectively overcome the crystal thickness and the orientation of organic thin film single crystal growth process Problems such as poor controllability, easy formation of twins, and water vapor interfering with crystal growth can effectively control the thickness and growth direction of DAST or DAST derivative crystals to avoid the formation of twins

Method used

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  • Method for induced growth of DAST and derivative single-crystal film thereof by using self-assembly monomolecular film
  • Method for induced growth of DAST and derivative single-crystal film thereof by using self-assembly monomolecular film
  • Method for induced growth of DAST and derivative single-crystal film thereof by using self-assembly monomolecular film

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Embodiment

[0044] Such as figure 1 As shown, the main structure of this embodiment includes a beaker 1, a glass sheet 2, a DAST methanol solution 3, and a sealed box 4 with a humidity of 4%. Two pieces of glass slides 2 are inserted into the methanol solution 3 of DAST in the manner of leaning against the mouth of the beaker 1 close to each other.

[0045] The amorphous substrate used in this example is a glass flake with a size of 2.5cm×7.5cm, and dry DAST powder is used as a raw material. The specific growth process is as follows:

[0046] (1) select dry DAST powder to be dissolved in methanol solvent, be mixed with the methanol solution of DAST that the mass fraction of DAST is 1%, standby;

[0047] (2) Clean the two glass substrates: ultrasonically in acetone, ethanol and deionized water for 15 minutes respectively, and then blow dry with high-purity nitrogen;

[0048] (3) Prepare Piranha solution: slowly add concentrated sulfuric acid to 30% H2O according to the volume ratio of 7:...

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Abstract

The invention discloses a method for induced growth of DAST and a derivative single-crystal film thereof by using a self-assembly monomolecular film. The method comprises the following steps: performing self-assembly of a layer of monomolecular film containing one or more functional groups of -SO3-, -OH, -Cl-, -NH2-, -F- and -COOH on the surface of a substrate to realize functionalization of the substrate; clinging two functionalized substrates in parallel and inserting to DAST or DAST derivative solution; and growing DAST or DAST derivative single crystal between the two substrates by adopting a slow solvent evaporation process. The method disclosed by the invention can effectively overcome the problems such as poor thickness and orientation controllability of crystal, easy formation of twin crystal and water vapor interference with crystal growth in the growth process of organic film single crystal, and can effectively control the thickness and growth direction of the DAST or DAST derivative crystal to avoid twin crystal.

Description

technical field [0001] The invention belongs to the technical field of crystal growth, and relates to a method for inducing the growth of a self-assembled monomolecular film of DAST and its derivative monocrystalline film. Background technique [0002] Organic nonlinear optical materials are widely used in optical frequency conversion and optical signal processing, and have important application values ​​in lasers, communications, electronic instruments, and medical equipment. Compared with inorganic nonlinear materials, organic nonlinear optical materials usually have the advantages of larger nonlinear optical coefficient, higher damage threshold, easy processing, synthesis and modification (see J.Zyss, J.Mol.Electron. , 1985, 1, 25. Literature). [0003] Among them, the organic DAST crystal is considered to be one of the best nonlinear optical materials, with a large second-order nonlinear coefficient (for example, under the action of 1318nm wavelength laser, the d of DAS...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B7/06C30B29/54
CPCC30B7/06C30B29/54
Inventor 许向东戴泽林陈哲耕蒋亚东孙铭徽谷雨王福连宇翔李欣荣
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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