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Preparation method of silver nanoparticle lattice with wide plasmon resonant frequency regulation range

A technology of plasmon resonance and silver nanoparticles, which is applied in the field of preparation of silver nanoparticle lattices, can solve the problems of lack of effective and general methods and achieve low-cost effects

Inactive Publication Date: 2011-04-06
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, there is still a lack of effective and general methods for the regulation of plasmon resonance in dense silver nanoparticle lattices with diameters less than 30 nm.

Method used

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  • Preparation method of silver nanoparticle lattice with wide plasmon resonant frequency regulation range
  • Preparation method of silver nanoparticle lattice with wide plasmon resonant frequency regulation range
  • Preparation method of silver nanoparticle lattice with wide plasmon resonant frequency regulation range

Examples

Experimental program
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Effect test

Embodiment 1

[0042] (1) Cover the surface of the quartz glass substrate with a uniform square film film, with a film thickness of 8-15 nanometers, smear 704 vacuum silicone rubber at the four corners of the substrate to fix the substrate on the rotatable substrate seat 5;

[0043](2) the substrate holder 5 with the substrate is fixedly installed in the high vacuum deposition chamber 8 of the nanoparticle beam deposition system by screws, so that the substrate on the substrate holder 5 is in the center of the silver nanoparticle beam 4;

[0044] (3) Utilize the pumping system Rhodes pump 9 and the molecular pump 10 to vacuumize the deposition chamber 8, and the vacuum degree is 5×10 -5 Pa and from the inert gas inlet 11 to the condensing chamber 6 of the cluster beam source of the gas phase concentration method, the argon gas of 150 Pa is charged. Under this pressure, the atomizer 1 in the cluster beam source 7 of the gas phase concentration method passes through the magnetic Controlled spu...

Embodiment 2

[0047] (1) Cover a layer of uniform collodion film on the surface of the quartz glass substrate, the film thickness is 10-15 nanometers, smear 704 vacuum silicone rubber at the four corners of the substrate to fix the substrate on the rotatable substrate seat 5;

[0048] (2) the substrate holder 5 with the substrate is fixedly installed in the high vacuum deposition chamber 8 of the nanoparticle beam deposition system by screws, so that the substrate on the substrate holder 5 is in the center of the silver nanoparticle beam 4;

[0049] (3) Utilize the exhaust system Rhodes pump 9 and molecular pump 10 to vacuumize the deposition chamber 8, and the vacuum degree is 1×10 -5 Pa and from the inert gas inlet 11 to the condensing chamber 6 of the cluster beam source of the gas phase concentration method, the argon gas of 90 Pa is charged. Under this pressure, the atomizer 1 in the cluster beam source 7 of the gas phase concentration method passes through the magnetic Controlled sput...

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Abstract

The invention relates to a preparation method of silver nanoparticle lattice with a wide plasmon resonant frequency regulation range. The method comprises the following steps: (a) covering an organic film on a substrate, fixing the substrate on a rotatable substrate holder with a light hole; (b) installing the substrate holder in a high vacuum settling chamber to ensure that the substrate on the substrate holder is in the center of the beam; (c) adopting the gas phase aggregation method to cluster a beam source and generate silver nanoparticles, using a nozzle to form a silver nanoparticle beam with high directionality and accurately controlled equivalent deposition rate; and (d) using the silver nanoparticle beam to deposit on the substrate, and accurately controlling the deposition of the nanoparticles to control the coverage of the silver nanoparticles on the substrate to be 5%-78%. Therefore, the interplanar distance of the deposited silver nanoparticles can be controlled, the plasmon resonant frequency can evolve continuously, and the changes of the plasmon resonant frequency is monitored through the in-situ extinction spectrum. The method of the invention is characterized in that the technology is simple, the cost is low, the regulation precision of the plasmon resonant frequency is high, the continuous regulation in the wide range is easy to realize, etc.

Description

1. Technical field [0001] The invention relates to the technical fields of nanomaterials and nanodevices, and biological / chemical sensors, in particular to a method for preparing a silver nanoparticle lattice whose plasmon resonance frequency can be adjusted in a wide range. 2. Background technology [0002] The plasmon resonance properties of nanoparticle lattices have important application backgrounds in the fields of nanophotonic devices, micro-nano sensor devices, etc., especially in plasmon-enhanced spectroscopy (such as surface-enhanced Raman spectroscopy, surface-enhanced fluorescence spectroscopy) etc.), the plasmon resonance frequency of the nanoparticle lattice, the spacing and electromagnetic coupling strength between nanoparticles in the lattice have a crucial impact on the sensitivity and efficiency of plasmon-enhanced spectroscopy. Although several methods for tuning the plasmon resonance frequency of silver nanoparticle lattices have been developed internation...

Claims

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Application Information

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IPC IPC(8): B82B3/00B82Y40/00
Inventor 贺龙兵韩民宋凤麒
Owner NANJING UNIV
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