Method for preparing metal nano-particle thin films in various shapes on conductive glass

A conductive glass and glass technology, which is applied in the field of nanoparticle film preparation, can solve the problems of preparing single spherical nano-gold or rod-shaped gold nano-particles, and achieve the effect of easy large-scale production, simple preparation process and low equipment requirements

Inactive Publication Date: 2012-05-02
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing methods usually only prepare spherical gold nanoparticles or rod-shaped gold nanoparticles with a single shape.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0038] Clean the ITO conductive glass with soapy water and ultrapure water for 15 minutes in an ultrasonic cleaner. The ITO glass was immersed in a mixed aqueous solution of 10 mM LPEI and 0.2 M NaCl for 2 hours. The ITO glass was immersed in a mixed aqueous solution of 10 mM PSS and 0.2 M NaCl for 2 h. After the treated ITO glass was cleaned with ultrapure water, one end was immersed in the spherical nano-gold colloid solution for 12 hours. The ITO glass in the previous step was again immersed in the mixed aqueous solution of 10mM PSS and 0.2M NaCl for 2 hours. After the treated ITO glass was cleaned with ultrapure water, the other end was immersed in the rod-shaped nano-gold colloid solution for 12 hours. Immerse the ITO glass in the previous step in the PSS solution for 20 minutes, and then immerse the spherical end in the spherical nano-gold colloid solution for 40 minutes. Immerse the ITO glass in the previous step in the PSS solution for 20 minutes, and then immerse t...

Embodiment approach 2

[0040] The ITO conductive glass was cleaned with soapy water and ultrapure water for 20 minutes in an ultrasonic cleaner. The ITO glass was immersed in a mixed aqueous solution of 10 mM LPEI and 0.1 M NaCl for 3 hours. After the treated ITO glass was cleaned with ultrapure water, it was immersed in the triangular nano-silver colloid solution for 15 hours. Immerse the ITO glass in the previous step in the LPEI solution for 10 minutes, and then immerse in the triangular nano-silver colloid solution for 40 minutes. Repeat the previous step until a satisfactory coating effect is obtained. The prepared nano film contains triangular nano silver particles, and the absorption spectrum test results show that the nano film has good optical properties of the triangular nano silver particles.

Embodiment approach 3

[0042] Clean the ITO conductive glass with soapy water and ultrapure water for 15 minutes in an ultrasonic cleaner. The ITO glass was immersed in a mixed aqueous solution of 10 mM LPEI and 0.1 M NaCl for 2 hours. The ITO glass was immersed in a mixed aqueous solution of 10 mM PSS and 0.1 M NaCl for 1.5 h. After the treated ITO glass is cleaned with ultrapure water, it is immersed in the mixed colloid solution of spherical nano-gold and rod-shaped nano-gold for 12 hours, and the ITO glass in the upper part is immersed in PSS solution for 20 minutes. Mixed colloidal solution of gold and rod-shaped gold nanoparticles for 40 minutes. Repeat the previous step until a satisfactory coating effect is obtained. The prepared nano-film contains both spherical gold nanoparticles and rod-shaped gold nanoparticles. The absorption spectrum test results show that the nano-film has good optical properties of the mixed spherical gold nanoparticles and rod-shaped gold nanoparticles.

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PUM

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Abstract

The invention discloses a method for preparing metal nano-particle thin films in various shapes on conductive glass, which comprises the steps of: adding gold and silver nano-particles in different shapes, further coating the nano-particles in different shapes on ITO conductive glass, treating the surface of the ITO conductive glass and changing the electrifying characteristics on the surface of the ITO conductive glass in the process of coating the surface of Indium-Tin Oxide-ITO conductive glass. When different charges are electrified on the surface of the ITO conductive glass, the nano-particles in different shapes will be absorbed on the surface of treated ITO conductive glass so as to change the optical properties of the ITO conductive glass so that the ITO conductive glass is featured by optical properties of nano-particles in different shapes at the same time. The method provided by the invention controls the thickness of the nano-particle thin film by increasing the number of times of treatment.

Description

technical field [0001] The invention relates to a method for preparing a nanoparticle film. Background technique [0002] Due to their special optical properties, that is, Surface Plasmon Resonance (SPR), and their good biocompatibility, nano-noble metal particles have shown great application prospects in the fields of bio-optical sensing, medical diagnosis, and clinical treatment. . Spherical gold nanoparticles have an SPR absorption peak at around 520nm. Rod-shaped gold nanoparticles have two geometric parameters in the long axis and short axis directions, and their absorption spectrum has two SPR absorption peaks. The long axis peak varies with the aspect ratio and environmental refraction. rate changes are very sensitive. The triangular silver nanoparticles have three SPR absorption peaks, among which the in-plane dipole resonance peak is very sensitive to the change of the side length-thickness ratio and the refractive index of the environment. These local dielectric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/10
Inventor 朱键孙璋李剑君赵军武
Owner XI AN JIAOTONG UNIV
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