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Preparation method and application of metal-based DNA thermotropic liquid crystal

A thermotropic liquid crystal, metal-based technology, applied in the direction of liquid crystal materials, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problems of limited research, complicated operation, and few types of liquid crystal main bodies, etc., to achieve production The effect of high efficiency and simple synthesis method

Active Publication Date: 2021-10-29
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the inventors have found that the method of physically mixing nanoparticles and liquid crystals, or first dispersing in an organic solvent and then volatilizing the solvent, is often used, the operation is complicated, and there may be problems such as uneven mixing.
At the same time, the presence of solvents may limit its research in the fields of electricity and optics
Secondly, at present, most of the liquid crystal main bodies used are mature commercial 5CB, and there are few types of liquid crystal main bodies.

Method used

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  • Preparation method and application of metal-based DNA thermotropic liquid crystal
  • Preparation method and application of metal-based DNA thermotropic liquid crystal
  • Preparation method and application of metal-based DNA thermotropic liquid crystal

Examples

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preparation example Construction

[0025] In one embodiment of the present disclosure, a method for preparing metal-based DNA thermotropic liquid crystals includes: using DNA as a template, adding a metal precursor solution, mixing uniformly, adding a reducing agent, and in situ reduction to obtain metal nanoparticles, Then self-assemble with positively charged vesicles to prepare metal-based DNA thermotropic liquid crystals. This method uses DNA as a template and stabilizer, and introduces nanoparticles through the in situ reduction method. The prepared metal-based thermotropic liquid crystal nanoparticles are evenly doped, and can be extended to the preparation of various metal-based thermotropic liquid crystals (such as gold, silver, etc.). , platinum, copper, palladium, etc.). This method expands and simplifies the preparation method of nanoparticle-doped thermotropic liquid crystals. Secondly, the basic properties of thermotropic liquid crystals (such as melting point, clearing point, liquid crystal phase ...

Embodiment 1

[0037] Example 1: Preparation of 250bp single-stranded DNA and anion / cation surfactant composite vesicle DTAL.

[0038] Prepare 3mM 250bp double-stranded DNA solution, and after pyrolysis at 95°C for 45 minutes, quickly enter the ice-water bath for 2 hours to prepare 250bp single-stranded DNA;

[0039] Prepare 8mM sodium laurate (NaL) mother solution and 20mM dodecyltrimethylammonium bromide (DTAB) mother solution, mix the two in equal volumes to obtain DTAL vesicles, and store them in a constant temperature incubator at 25°C for 3 weeks use.

Embodiment 2

[0040] Example 2: 250bp single-stranded DNA was used as a stabilizer to synthesize gold nanoparticles.

[0041] First, add 5mL 3mM 250bp single-stranded DNA solution into the test tube, dropwise add different volumes (10 microliters to 1000 microliters) of chloroauric acid solution (5mM) and stir at room temperature for 5min, then add dropwise to the mixed solution under stirring Add 100 μl of freshly prepared sodium borohydride solution (50 mM), and stir for 15 min in a dark environment.

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Abstract

The invention relates to the technical field of thermotropic liquid crystal preparation, in particular to a preparation method and application of a metal-based DNA thermotropic liquid crystal. The preparation method comprises the following steps that DNA is used as a template, a metal-based solution is added, a reducing agent is added after uniform mixing, in-situ reduction is performed to obtain metal nanoparticles, and the metal nanoparticles are self-assembled with positively-charged vesicles to prepare the metal-based DNA thermotropic liquid crystal. According to the method, the metal-based thermotropic liquid crystal can be prepared without participation of a solvent, the preparation method is simple, the yield is high, and the method has the universality.

Description

technical field [0001] The disclosure relates to the technical field of thermotropic liquid crystal preparation, specifically a preparation method and application of metal-based DNA thermotropic liquid crystals. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The discovery of DNA solvent-free fluids and thermotropic liquid crystals provides new research ideas for the development of DNA soft materials. The current research has found that the properties of DNA thermotropic liquid crystals can be changed by changing the selected surfactant alkyl chain length, surfactant type, The counter ion and DNA chain length are adjusted. In order to further promote the application rese...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00C09K19/00
CPCB22F9/24B82Y30/00B82Y40/00C09K19/00
Inventor 郝京诚陈晓丽武文娜刘立董姝丽
Owner SHANDONG UNIV
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