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Method for producing metal nano wire based on DNA template

A metal nanometer and wire technology, applied in nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problems of difficult control of length, uncontrollable direction, severe twist of DNA template, etc., and achieve easy control of length and uniform and controllable diameter. Effect

Inactive Publication Date: 2008-09-24
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the characteristics of DNA's own soft matter, it is easy to combine with each other to form various complex secondary structures or network structures, which form a huge obstacle to the utilization of DNA metal wires. Therefore, the nanowires prepared by the above chemical methods have diameters Inhomogeneity is controllable, the DNA template itself is severely twisted, the direction is uncontrollable, the length is not easy to control, and many other shortcomings, and the separation is difficult

Method used

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  • Method for producing metal nano wire based on DNA template
  • Method for producing metal nano wire based on DNA template
  • Method for producing metal nano wire based on DNA template

Examples

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Effect test

Embodiment 1

[0030] Soak the cleaned glass in 35% organic silanol for 25 minutes, take it out, wash and air-dry it for later use. Spread a mixed solution of 1.5 mg / ml DNA and 20 g / L magnesium chloride on the substrate with a micropipette, let it dry naturally for 2 hours, then use a peristaltic pump to rinse for 12 minutes at a speed of 25 rpm, and take out Air-dry naturally, then immerse in 10 g / L silver nitrate solution for 15 minutes, take it out and rinse it gently with pure water 3 times, then soak in 15 g / L sodium hydroxide plus 120 g / L formaldehyde solution for 10 minutes, Take it out and rinse it with pure water for 3 times, then air-dry to get the silver nano wire. The prepared nano-silver wire has a length of 600 nanometers and a width of 30 nanometers.

Embodiment 2

[0032] Soak the cleaned silicon wafer in 35% organic silanol for 10 minutes, take it out, wash and air dry it for later use. Then spread the mixed solution of 1.5 mg / ml DNA and 20 g / L magnesium chloride on the substrate with a micropipette, let it dry naturally for 2 hours, then use a peristaltic pump to rinse for 20 minutes at a speed of 10 rpm, and take out Naturally air-dry, then immerse in 20 g / L copper nitrate solution for 30 minutes, take it out and rinse it gently with pure water for 3 times, then put it in 25 g / L hypophosphite solution plus 140 g / L formaldehyde solution for 25 minutes , take it out and wash it with pure water for 3 times, then air-dry to get the copper nano wire. The prepared nano copper wire has a length of 100 nanometers and a width of 25 nanometers.

Embodiment 3

[0034] Soak the cleaned silicon wafer in 40% organic silanol for 20 minutes, take it out, wash and air dry it for later use. Spread a mixed solution of 0.5 mg / ml DNA and 20 g / L magnesium chloride on the substrate with a micropipette, let it dry naturally for 2 hours, then rinse it with a peristaltic pump at 20 rpm for 15 minutes, and take out Air-dry naturally, then immerse in 40 g / L ferric nitrate solution for 25 minutes, take it out and rinse gently with pure water 3 times, then put it into 25 g / L hypophosphite solution for 15 minutes, take it out and rinse with pure water for 3 The iron nanowires were obtained after air-drying for a few times. The prepared iron nanowire has a length of 2000-3000 nanometers and a width of 50 nanometers.

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Abstract

The invention provides a method based on a DNA template for preparing metal nano-wire, comprising the processing steps as follows: 1) the substrate is arranged in an organic silanol to carry out amination disposal; 2) the DNA with suitable quantity is fixed on the substrate by a chemical bond; 3) the substrate is washed by a creepage pump and the DNA which is not well bonded is washed away; 4) the substrate is dipped in oxidant metal salt solution, so as to lead iron cation to be adsorbed; 5) the substrate is then dipped in a reducing agent, so as to gain the metal nano-wire which takes the DNA as framework. By adopting suitable process and content of DNA, the method for preparing the metal nano-wire realizes the uniformity and controllability of nano-wire, and leads the possibility that the DNA molecule is taken as nano-wire to fabricate nano-device to be realized.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing metal nanowires based on DNA templates. Background technique [0002] Nano-devices are a hot topic that has gradually developed in recent years, and one-dimensional nanowires have played a very important role in special nano-devices. Due to its potential to construct nanoelectronic devices, DNA is increasingly becoming a prominent material for micro- and nano-assembly, which lays the foundation for the combination of nanotechnology and biology. As we all know, DNA is an important biomacromolecule with a unique double helix structure, thermodynamic stability, linear molecular structure and mechanical rigidity, as well as important properties such as self-assembly, denaturation and renaturation. Therefore, the preparation of DNA-based metal nanowires is of great significance. [0003] In recent years, for the purpose of increasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00C23C18/31C23C18/40C23C18/36C23C18/44B82B3/00
Inventor 徐慧张鹏华夏昆李明君
Owner CENT SOUTH UNIV
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