Silver nanowire with core-shell structure and preparation method and application thereof

A technology of silver nanowires and core-shell structure, which is applied in the fields of nanotechnology, nanotechnology and nanotechnology for material and surface science, and achieves the effects of low preparation cost, improved dynamic decay rate, and increased reservoir scale.

Pending Publication Date: 2022-07-22
NANJING COLLEGE OF INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the time constant τ of the diffused resistive memory prepared by doping silver particles to the SiO2 functional layer can be less than 5 milliseconds, but there has been no report on the use of silver nanoparticles doped system in the neuromorphic nanowire system.

Method used

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  • Silver nanowire with core-shell structure and preparation method and application thereof
  • Silver nanowire with core-shell structure and preparation method and application thereof
  • Silver nanowire with core-shell structure and preparation method and application thereof

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preparation example Construction

[0045] In some embodiments, the method for preparing silver nanowires with a core-shell structure includes the following steps:

[0046] Weigh silver acetate and / or silver nitrate, add deionized water to make solution A; weigh glucose, add deionized water to make solution B; weigh PVP, add deionized water to make solution C;

[0047] Weigh NaCl, add deionized water to make solution D;

[0048] Mix solution A and solution B, stir, then add solution C to continue stirring, then add solution D and ultrasonically disperse to obtain a mixed solution; in the mixed solution, Ag + The concentration of PVP is 10~30wt%, the concentration of glucose is 10~30wt%, the concentration of PVP is 10~30wt%, the - The concentration is 10~30wt%.

[0049] The obtained mixed solution was poured into a closed hydrothermal reactor, and reacted at 130 to 180 ° C for 12 to 22 hours to obtain silver nanowires with a core-shell structure. figure 2 It is an SEM image of a silver nanowire with a core-sh...

Embodiment 1

[0054] Preparation of silver nanowires:

[0055] First, weigh 0.025 g of silver acetate powder and 0.025 g of silver nitrate powder into a beaker, add 15 mL of deionized water to make solution A; secondly weigh 0.12 g of glucose into a beaker, add 5 mL of deionized water to make up Solution B; then weigh 1 g of PVP into a beaker, add 5 mL of deionized water to make solution C; finally weigh 0.035 g of NaCl into a beaker, add 15 mL of deionized water to make solution D.

[0056] Next, solution A was mixed with solution B, stirred for 10 minutes, then added with solution C and continued to stir for 20 min, then added with solution D and dispersed by ultrasonic for 5 min.

[0057] Finally, the obtained mixed solution was poured into a closed hydrothermal reactor, and reacted at 130°C for 22 hours to obtain a silver nanowire product. The silver nanowires prepared in this example have an average length of about 38 μm, an average diameter of about 36 nm, an aspect ratio of about 10...

Embodiment 2

[0061] Preparation of silver nanowires:

[0062] First, weigh 0.02 g of silver acetate and 0.08 g of silver nitrate powder into a beaker, add 25 mL of deionized water to make solution A; secondly weigh 0.36 g of glucose into a beaker, add 5 mL of deionized water to make solution B ; Then weigh 0.05 g of PVP into a beaker, add 5 mL of deionized water to make solution C; finally weigh 0.03 g of KCl into a beaker, add 15 mL of deionized water to make solution D.

[0063] Next, solution A was mixed with solution B, stirred for 15 minutes, then added with solution C and continued to stir for 20 min, then added with solution D and dispersed by ultrasonic for 5 min. Finally, the obtained mixed solution was poured into a closed hydrothermal reactor, and the reaction was carried out at 150° C. for 22 hours to obtain a silver nanowire product. The silver nanowires prepared in this example have an average length of about 25 μm, an average diameter of about 56 nm, an aspect ratio of abou...

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Abstract

The invention discloses a silver nanowire with a core-shell structure and a preparation method and application thereof, the silver nanowire comprises a silver nanowire core layer and a polymer shell layer coating the outer side of the silver nanowire core layer, and the polymer shell layer is doped with silver nanoparticles. According to the preparation method, one-step polyol is blended to serve as a solvent and a reducing agent, and under the condition that PVP and Cl <-> ions exist, silver source reactants are subjected to a liquid-phase reduction reaction to prepare the silver nanowires. The preparation cost is low, the preparation method is simple, the silver nanoparticles doped in the polymer shell layer induce and strengthen the behavior that the conductivity of the nanowire network changes along with the time sequence change of pulse voltage, and the memristive characteristics of double-pulse simplification, nonlinear response, dynamic attenuation and the like are achieved; silver nanoparticles spontaneously doped into the PVP layer in the silver nanowire preparation process are used as'island bridges' for silver migration and diffusion, the nonlinear dynamic attenuation speed can be increased, and the reservoir scale of a reservoir calculation system is increased.

Description

technical field [0001] The invention relates to a silver nanowire with a core-shell structure, a preparation method and application thereof, and belongs to the technical field of functional materials. Background technique [0002] Due to the significant advantages of low cost and high density, memristive nanonetworks composed of core-shell structured silver nanowires are often used as physical "reservoirs" in neuromorphic systems such as reservoir computing (RC), which can inspire cognition and neuroscience. Brain-like computational artificial intelligence devices offer new options for functional materials. As a cutting-edge artificial intelligence hardware system, the neuromorphic nanowire network (NNWN) for reservoir computing has developed from a proof-of-concept to a practical demonstration stage in recent years. NNWNs are a relatively new class of neuromorphic devices. It is usually a uniform self-organized network composed of nanowires with a core-shell structure in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/054B22F1/102B22F9/24B82Y30/00B82Y40/00G06N3/063
CPCB22F9/24B82Y40/00B82Y30/00G06N3/063
Inventor 赵玮张君赵春宝张彦娜秦美婷王诉
Owner NANJING COLLEGE OF INFORMATION TECH
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