Functionalized core-shell nanowire as well as preparation method and application thereof

A core-shell nanotechnology, functionalized technology, applied in nanotechnology, nanotechnology, nanotechnology for sensing, etc., can solve the problems of limited material types, cumbersome and time-consuming preparation process, and achieve simplified preparation process and broad application. Prospect, effect of excellent electrochemical performance

Active Publication Date: 2021-07-23
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, one-dimensional conductive nanomaterials are ideal materials for preparing nanoelectrodes, but there are limitations in the types of materials (mainly carbon, gold, and platinum), and the preparation process is cumbersome and time-consuming.

Method used

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  • Functionalized core-shell nanowire as well as preparation method and application thereof
  • Functionalized core-shell nanowire as well as preparation method and application thereof
  • Functionalized core-shell nanowire as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The specific preparation steps of SiC@Au-PEDOT nanowires (SiC as the core and Au-PEDOT as the shell) are as follows:

[0035] (1) Put 1 mg of SiC nanowires in a 100 mL beaker, add 30 mL of acetonitrile as a solvent, and ultrasonically disperse the SiC nanowires evenly.

[0036] (2) Under stirring, add 500 μL of EDOT monomer to the SiC dispersion liquid obtained in step (1), so that EDOT is uniformly dispersed and dissolved.

[0037] (3) Add 2 mL of HAuCl to the dispersion obtained in step (2) 4 (25mM) as an oxidizing agent to initiate chemical polymerization. In this process, EDOT is oxidatively polymerized into the conductive polymer PEDOT, AuCl 4 - Reduction to gold nanoparticles.

[0038] (4) After the reaction system was stirred at room temperature for 24 h, the reaction solution was centrifuged and washed three times with water and ethanol respectively to obtain SiC@Au-PEDOT core-shell nanowires. Such as figure 2 As shown, the surface of SiC@Au-PEDOT nanowir...

Embodiment 2

[0040] TiO 2 @Au-PEDOT nanowires (TiO 2 is the core, and Au-PEDOT is the shell) the specific preparation steps are as follows:

[0041] (1) 1mg TiO 2 Nanowires were placed in a 100mL beaker, 30mL of acetonitrile was added as a solvent, and the TiO 2 The nanowires are uniformly dispersed.

[0042] (2) under stirring state, to the TiO obtained in step (1) 2 Add 500μL EDOT monomer to the dispersion liquid to make EDOT evenly dispersed and dissolved.

[0043] (3) Add 2 mL of HAuCl to the dispersion obtained in step (2) 4 (25mM) as an oxidizing agent to initiate chemical polymerization. In this process, EDOT is oxidatively polymerized into the conductive polymer PEDOT, AuCl 4 - Reduction to gold nanoparticles.

[0044] (4) After the reaction system was stirred at room temperature for 24 hours, the reaction solution was centrifuged, and washed 3 times with water and ethanol respectively to obtain TiO 2 @Au-PEDOT core-shell nanowires. Such as figure 2 Shown, TiO 2 The s...

Embodiment 3

[0046] SiO 2 @Au-PEDOT nanowires (SiO 2 is the core, and Au-PEDOT is the shell) the specific preparation steps are as follows:

[0047] (1) 1mg SiO 2 Nanowires were placed in a 100mL beaker, 30mL of acetonitrile was added as a solvent, and the TiO 2 The nanowires are uniformly dispersed.

[0048](2) under stirring state, to the SiO that step (1) obtains 2 Add 500μL EDOT monomer to the dispersion liquid to make EDOT evenly dispersed and dissolved.

[0049] (3) Add 2 mL of HAuCl to the dispersion obtained in step (2) 4 (25mM) as an oxidizing agent to initiate chemical polymerization. In this process, EDOT is oxidatively polymerized into the conductive polymer PEDOT, AuCl 4 - Reduction to gold nanoparticles.

[0050] (4) After the reaction system was stirred at room temperature for 24 hours, the reaction solution was centrifuged, and washed 3 times with water and ethanol respectively to obtain SiO 2 @Au-PEDOT core-shell nanowires. Such as figure 2 Shown, SiO 2 The s...

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Abstract

The invention discloses a functionalized core-shell nanowire as well as a preparation method and application thereof, and belongs to the field of electrochemistry and materials. According to the invention, through a chemical polymerization reaction between 3,4-ethylenedioxythiophene (EDOT) and a noble metal complex, the surface of a non-conductive nanowire is uniformly coated with a poly EDOT (PEDOT)-noble metal nanoparticle composite coating, and the functionalized core-shell nanowire is prepared in batches. Based on the simple, convenient and universal one-pot reaction, various functionalized conductive core-shell nanowires are prepared in batches by regulating and controlling the types of core and shell materials. By adopting the core-shell nanowire as an electrode material for assembly, a functionalized nanoelectrode with excellent electrochemical performance can be obtained, the preparation process of the nanoelectrode is simplified, the limitation of an existing nanoelectrode preparation material is broken through, and real-time quantitative monitoring of biological signal molecules in a single living cell is realized.

Description

technical field [0001] The invention belongs to the field of electrochemistry and materials, and in particular relates to a functionalized core-shell nanowire and its preparation method and application. Background technique [0002] Numerous fundamental scientific processes (such as cell signal transduction, catalytic reactions, etc.) occur at the nanoscale, thus in situ monitoring of these processes has attracted extensive research interest. Due to its high sensitivity and spatial resolution, nanoelectrode electrochemical technology has shown significant advantages in nanoscale research. Among them, one-dimensional conductive nanomaterials are ideal materials for preparing nanoelectrodes, but there are limitations in the types of materials (mainly carbon, gold, and platinum), and the preparation process is cumbersome and time-consuming. Therefore, it is still a huge challenge to develop a facile and efficient method for preparing functionalized conductive nanowires. Cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/83D06M15/63B22F9/24B82Y15/00B82Y30/00B82Y40/00G01N27/26
CPCD06M11/83D06M15/63B22F9/24B82Y30/00B82Y40/00B82Y15/00G01N27/26
Inventor 黄卫华吴文涛
Owner WUHAN UNIV
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