Particle spacing control method for ordered precious metal nano-particle array

A nanoparticle array and control method technology is applied in the field of particle spacing control of ordered noble metal nanoparticle arrays, and can solve problems such as inability to accurately design the spacing between adjacent particles of the array and obstacles to noble metal nanoparticle arrays.

Active Publication Date: 2018-03-27
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the distance adjustment method and even the existing control methods are facing a difficulty, that is, the distance between adjacent particles of the array cannot be precisely

Method used

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  • Particle spacing control method for ordered precious metal nano-particle array
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  • Particle spacing control method for ordered precious metal nano-particle array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for controlling the particle spacing of an ordered noble metal nanoparticle array, comprising the steps of:

[0046] 1) Diblock copolymer template method to implant the initial ordered array of platinum nanoparticles

[0047] Add solid chloroplatinic acid to the PS-b-P4VP spherical micelles / tetrahydrofuran solution at a molar ratio of chloroplatinate to pyridine of 1:8, magnetically stir at a rotor speed of 400 rpm for 6 hours at room temperature, and prepare a platinum content of 0.125 mg / ml of precursor / copolymer THF solution.

[0048] A titanium sheet with a size of 10mm*10mm and a thickness of 0.2mm was pickled in hydrochloric acid with a mass fraction of 10% at 80°C for 10min, and then rinsed several times with deionized water. The titanium sheets after pickling were polished with No. 600, No. 1000, No. 2000 and No. 3000 metallographic sandpaper in sequence, and ultrasonically cleaned in absolute ethanol and deionized water for 10 min in sequence.

[00...

Embodiment 2

[0054] The steps are basically the same as those in Example 1, the only difference being that the total number of implants is designed to be S=9, so as to obtain an ordered array of platinum nanoparticles whose spacing is 1 / 3 times that of the initial array. After finishing the preparation, the calculated l n =14nm, in line with the design value, and the particle arrangement form and main particle diameter are consistent with the initial array, that is, when S=3 n , then the center-to-center distance l between adjacent particles in the ordered noble metal nanoparticle array n Satisfies the following formula: l n = l 0 / 3 n / 2 ,Such as Figure 3a with Figure 3b They are the photo of the morphology of the titanium-loaded ordered platinum nanoparticle array, the statistical results of the particle diameter and the center-to-center distance of adjacent particles, respectively.

Embodiment 3

[0056] The steps are basically the same as in Example 1, the only difference is that the total number of implants designed is S=27, so that the spacing is 1 / 3 of the initial array 3 / 2 times the ordered array of platinum nanoparticles. After finishing the preparation, the calculated l n =8nm, in line with the design value, and the particle arrangement and main particle diameter are consistent with the original array, Figure 4a with Figure 4b They are the photo of the morphology of the titanium-loaded ordered platinum nanoparticle array, the statistical results of the particle diameter and the center-to-center distance of adjacent particles, respectively.

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Abstract

The invention provides a particle spacing control method for an ordered precious metal nano-particle array. The method comprises the following steps that 1, a carrier is implanted into an initial ordered precious metal nano-particle single-layer array through an organic solution with dispersed precious metal precursor/diblock copolymer micelle in a dip-coating mode; 2, implanting is conducted multiple times on the carrier loaded with the initial array according to the process in the step 1, and finally the ordered precious metal nano-particle array meeting the target particle spacing is obtained. Accordingly, by means of the positioning and dispersing mechanism of the spherical micelle in the multi-time implanting process, the problem that particle spacing design cannot be achieved througha single diblock copolymer template is solved. According to the discovery and technology, the controllable range of the spacing is determined, precise design and adjustment of the center distance ofthe adjacent particles of all kinds of single-layer precious metal nano-particle ordered arrays are achieved, and a material preparation method and technology are provided for optimizing the catalyticperformance, optical performance, electrical performance and other performances closely related to the spacing with the particles or density.

Description

Technical field: [0001] The invention belongs to the technical field of noble metal nanoparticles, and in particular relates to a particle distance control method of an ordered noble metal nanoparticle array. Background technique: [0002] In the fields of catalysis, optics, electronics, and energy conversion and storage, ordered noble metal nanoparticle arrays have important application value and broad application prospects. On the one hand, noble metal nanoparticles have excellent redox catalytic properties, photosensitivity, electrical conductivity, and chemical stability, and are the preferred catalysts and sensitizers in the process of mutual conversion of light, electricity, and chemical energy. On the one hand, when noble metal nanoparticles are arranged in a uniform and ordered array, their unique effects on the micro scale can be concentrated on the macro scale, such as surface plasmon resonance, high-density periodic catalytic active sites, etc. At the same time, t...

Claims

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Application Information

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IPC IPC(8): B82B3/00B82B1/00B82Y30/00B82Y40/00
CPCB82B1/005B82B3/0014B82Y30/00B82Y40/00
Inventor 闫常峰甘源王志达郭常青史言谭弘毅卢卓信
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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