A Method for Dynamically and Reversibly Tuning the Properties of Surface Plasmon Resonance

A technology of surface plasmon and surface plasmon, applied in the field of excitonic photonics, can solve the problems of complex control process, poor repeatability, high cost, etc., and achieve the effect of strong controllability, good effect and high sensitivity

Active Publication Date: 2019-04-23
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The current methods for regulating the surface plasmon resonance properties of nanomaterials have problems such as complex regulation process, high cost, low efficiency, and poor repeatability.

Method used

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  • A Method for Dynamically and Reversibly Tuning the Properties of Surface Plasmon Resonance
  • A Method for Dynamically and Reversibly Tuning the Properties of Surface Plasmon Resonance
  • A Method for Dynamically and Reversibly Tuning the Properties of Surface Plasmon Resonance

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preparation example Construction

[0041] In some embodiments, the preparation method of the chalcogenide-copper compound-coated noble metal nanomaterial comprises:

[0042] In a protective atmosphere, the noble metal nanoparticles are dispersed in deionized water, and a surfactant is added to form a nanoparticle dispersion;

[0043] maintaining a protective atmosphere, while adding a selenium source and / or a sulfur source to the nanoparticle dispersion, and then adding a reducing agent to obtain a reaction system containing selenium and / or sulfur-coated noble metal nanoparticle intermediates;

[0044] A copper source is added to the reaction system containing the selenium and / or sulfur-coated noble metal nanoparticle intermediate to carry out the reaction to form the chalcogen copper compound-coated noble metal nanomaterial.

[0045] In some more specific embodiments, the method for dynamically and reversibly regulating surface plasmon resonance properties includes: dispersing a noble metal salt in a solvent c...

Embodiment 1

[0075] Embodiment 1 Embodiment 1 of the present invention provides a composite nanomaterial, which is prepared according to the following steps:

[0076] (1) First, a gold seed solution is prepared. Stir the chloroauric acid solution and cetyltrimethylammonium bromide solution evenly at room temperature, quickly add the reducing agent sodium borohydride solution stored in an ice bath, keep stirring for 2 minutes, and then stand at 25-30°C 30min to 1h to get the gold seed solution. Second, prepare gold rod growth solution. Stir cetyltrimethylammonium bromide aqueous solution, silver nitrate solution and chloroauric acid solution evenly at room temperature, then add reducing agent ascorbic acid solution, and keep stirring until the solution is colorless. Finally, adding a certain amount of the prepared gold seed solution into the gold rod growth solution, stirring for 10 seconds, and then standing at 25-35°C for 8-12 hours to obtain rod-shaped gold nanoparticles;

[0077] (2)...

Embodiment 2

[0082] Embodiment 2 The present invention adjusts the method of Embodiment 1: increase the air exposure time in step (5), carry out an absorption spectrum measurement every 30min at the beginning, carry out an absorption spectrum measurement every 1h in the mid-term, and carry out once every 2h in the later stage Absorption spectroscopy measurements, the results are as follows Figure 4 as shown ( Figure 4 The middle arrow shows the variation trend of the absorption spectrum gradually increasing with the air exposure time), it can be seen that this embodiment can realize the controllable adjustment of the surface plasmon resonance properties of the material.

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Abstract

The present invention discloses a method of dynamic reversible regulatory surface plasma resonance properties, which includes: preparing for copper -sulfurized copper -covered precious metal nanoma;Steps such as the resonance of the surface of the material.The present invention can achieve the adjustability of the surface plasma resonance by regulating the size, appearance and carrier concentration of the material, and the process is simple, the conditions are easy to control, and can be repeated multiple times.The important significance is also potential in detection, infrared switches and infrared sensors.

Description

technical field [0001] The invention belongs to the field of surface plasmon photonics, and specifically relates to a method for dynamically and reversibly regulating the properties of surface plasmon resonance, that is, the reversible properties of surface plasmon resonance are realized by regulating the shape, size and carrier concentration of materials. tonality. Background technique [0002] Localized surface plasmon resonance (LSPR) is mostly a phenomenon in which free electrons in noble metal nanoparticles oscillate coherently under an external electromagnetic field, resulting in enhanced absorption and scattering resonance. LSPR is a powerful means of optical regulation at the nanoscale, which can break through the optical diffraction limit. Around this unique optical phenomenon, a series of research directions have emerged, such as surface-enhanced Raman based on the surface photoelectric field enhancement effect of LSPR, surface-enhanced fluorescence, and surface p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/02G01N21/552B82Y30/00B82Y40/00
CPCG01N21/554B82Y30/00B82Y40/00B22F9/24B22F1/07B22F1/16
Inventor 姜江杨钟贞邹彧
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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