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Preparation method of multifunctional integrated nano-wire array

A nanowire array, multi-functional technology, applied in the field of material preparation and functional modification, can solve the problems of high requirements for the selection of materials and complex process preparation.

Active Publication Date: 2012-02-22
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For the multi-functional integration of nanowires, the scientific community has made preliminary explorations, mainly focusing on the synthesis of multi-segment nanowires, that is, a single nanowire is composed of multiple segments of different types of materials, and then modified for each segment of material. The preparation is more complicated, and the requirements for the selection of materials and their own properties are higher

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Examples

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Embodiment 1

[0052] Example 1 This embodiment relates to the integration of semiconductor nanoparticles and nucleic acid molecules on the surface of Si nanowires. The process includes the following steps:

[0053] (1) The preparation of Si nanowires adopts the method of metal-assisted corrosion: the corrosion solution used contains 0.02 mol / L AgNO 3 and 5 mol / L HF solution, take an n-type (100) silicon chip with a diameter of 150 mm and put it in the etching solution, react at room temperature for 10 minutes, take it out, HNO 3 And after washing with deionized water, the Si nanowire array was obtained, and the length was 100 nm measured by scanning electron microscope;

[0054] (2) Take 5 mL of PMMA with a viscosity of 1 mPa.s and drop it on the surface of the silicon wafer, place it in a vacuum desiccator, and extract the vacuum to 10 4 Pa, let it stand for 5min, so that the PMMA macromolecule evenly penetrates between the Si nanowires;

[0055] (3) Use a homogenizer in the air to pe...

Embodiment 2

[0059] Example 2 This embodiment relates to the integration of magnetic nanoparticles and proteins on the surface of the ZnO nanowire array, and the process includes the following steps:

[0060] (1) The preparation of ZnO nanowires adopts the CVD method: first weigh ZnO and C powder according to the molar ratio of 1:1 and mix them well, put them into one end of the quartz tube as the reaction source material; The bottom is placed on the other end of the quartz tube, and the distance from the raw material is kept at 10 cm; then the quartz tube is pushed into a high-temperature tube furnace, and the temperature at the raw material end is controlled to be 950 ° C, 50 sccm O 2 and 50sccm Ar as the reaction gas and carrier gas respectively, and the ZnO nanowire array was obtained after 1 hour of reaction, and the length of the nanowires was 10 μm measured by a scanning electron microscope;

[0061] (2) Take 500 μL of polyimide (PI) with a viscosity of 10 mPa.s and drop it on the...

Embodiment 3

[0066] Example 3 This embodiment relates to the integration of metal nanoparticles and cells on the surface of the TiO2 nanowire array, and the process includes the following steps:

[0067] (1) TiO 2 The template method was used to prepare the nanowires: first, 10 mL of tetrabutyl titanate was added to 50 mL of absolute ethanol, stirred for 5 min in an ice bath, and then a mixed solution containing 1 mL of deionized water, 0.05 mL of hydrochloric acid and 30 mL of ethanol was slowly added to it. A porous alumina template with a diameter of 20 mm, an average pore diameter of 100 nm, and a height of 30 μm was placed in the above solution for 30 min, taken out and dried, and then calcined in a muffle furnace at 500 ° C for 4 hours to make TiO 2 The nanowires are crystallized; after calcination, the template is placed in hydrochloric acid to remove alumina to obtain a length of 30 μm TiO 2 nanowire arrays;

[0068] (2) Take 500μL with a viscosity of 10 7 The polyvinyl alcoh...

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Abstract

The invention discloses a preparation method of multifunctional integrated nano-wire array. The method comprises the following steps: firstly covering a layer of an organic polymer solution on a surface of nano-wire array, allowing the array to stand under a vacuum condition so as to allow organic polymer to uniformly penetrate into the nano-wires, then obtaining a flattened surface by a glue-evening method; treating the surface by a dry glue-removing process to expose a part of the nano-wire array, performing surface modification of the part of nano-wires; removing residual organic polymer by an organic solvent, and further modifying the exposed nano-wires. The invention can integrate multiple functions, such as luminescence, magnetism, bio-marking and the like on a surface of a single nano-wire controllably, repeatably, and consistently; the preparation process is simple; the invention has universality for various types of nano-wire array, and is applicable to new material fields of gene drug carriers, biological / chemical sensing, and composite materials.

Description

technical field [0001] The invention relates to a preparation process of a nanowire array, in particular to a multifunctional integrated preparation method of a nanowire array, which belongs to the field of material preparation and functional modification. Background technique [0002] With the advancement of science and technology, nanomaterials represented by one-dimensional nanowires are gradually playing a vital role in the fields of biosensing, chemical sensing, solar cells, biological drug loading and targeted therapy. Generally, when one-dimensional nanowires are applied in the above fields, surface modification needs to be carried out according to different application requirements, so as to improve work efficiency and specificity. In terms of modification, the multifunctional integration of the nanowire surface has important scientific research value and industrial application prospects. The separation of target molecules can be achieved through magnetic field indu...

Claims

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Application Information

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IPC IPC(8): B81C1/00
Inventor 程国胜孔涛苏瑞巩张琦黄荣刘永萍张杰卫芬芬
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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