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A preparation method of visible/near-infrared light regulated plasmonic chiral switching nanostructures

A plasmon and nanostructure technology, applied in optical components, optics, instruments, etc., can solve the problems of complex and expensive photochemically responsive molecular synthesis, and achieve the effect of light source safety

Active Publication Date: 2021-03-26
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above problems, the object of the present invention is to provide a method for regulating plasmonic chiral conversion nanostructures with visible / near-infrared light. Plasmon circular dichroism (PCD) signals of assembled structures to overcome the complex and expensive synthesis of traditional photochemically responsive molecules

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1. Preparation of side-by-side self-assembled structure of gold nanorods

[0033] Wherein, the preparation process of gold nanorods is as follows:

[0034] 1. Gold Seed Preparation

[0035] Get 7.5ml of 0.1mol / L CTAB solution, add 1.8ml of water, add concentration under stirring condition and be the chloroauric acid (HAuCl) of 24.7mmol / L 4 ) solution of 100.4μl, add 0.01mmol / L sodium borohydride (NaBH 4 ) solution of 600 μl, stirred for 3 minutes to obtain gold species for later use;

[0036] 2. Growth medium preparation

[0037] Get 0.1mol / L CTAB solution 100ml, add concentration and be the chloroauric acid (HAuCl 4 ) in 2 mL of aqueous solution, 120 μL of silver nitrate aqueous solution with a concentration of 0.1 mol / L, and 552 μL of ascorbic acid aqueous solution with a concentration of 0.1 mol / L. After the mixed solution was left to stand for 12 hours, 552 μL of an aqueous solution of ascorbic acid with a concentration of 0.1 mol / L was added twice, with a...

Embodiment 2

[0056] Step 1. Preparation of side-by-side self-assembled structure of gold nanorods

[0057] Wherein, the preparation process of gold nanorods is as follows:

[0058] 1. Gold Seed Preparation

[0059] Get 7.5ml of 0.1mol / L CTAB solution, add 1.8ml of water, add concentration under stirring condition and be the chloroauric acid (HAuCl) of 24.7mmol / L 4 ) solution of 100.4μl, add 0.01mmol / L sodium borohydride (NaBH 4 ) solution of 600 μl, stirred for 3 minutes to obtain gold species for later use;

[0060] 2. Growth medium preparation

[0061] Get 0.1mol / L CTAB solution 100ml, add concentration and be the chloroauric acid (HAuCl 4 ) in 2 mL of aqueous solution, 120 μL of silver nitrate aqueous solution with a concentration of 0.1 mol / L, and 552 μL of ascorbic acid aqueous solution with a concentration of 0.1 mol / L. After the mixed solution was left to stand for 12 hours, 552 μL of an aqueous solution of ascorbic acid with a concentration of 0.1 mol / L was added twice, with a...

Embodiment 3

[0080] Step 1. Preparation of side-by-side self-assembled structure of gold nanorods

[0081] Wherein, the preparation process of gold nanorods is as follows:

[0082] 1. Gold Seed Preparation

[0083] Get 7.5ml of 0.1mol / L CTAB solution, add 1.8ml of water, add concentration under stirring condition and be the chloroauric acid (HAuCl) of 24.7mmol / L 4 ) solution of 100.4μl, add 0.01mmol / L sodium borohydride (NaBH 4 ) solution of 600 μl, stirred for 3 minutes to obtain gold species for later use;

[0084] 2. Growth medium preparation

[0085] Get 0.1mol / L CTAB solution 100ml, add concentration and be the chloroauric acid (HAuCl 4 ) in 2 mL of aqueous solution, 120 μL of silver nitrate aqueous solution with a concentration of 0.1 mol / L, and 552 μL of ascorbic acid aqueous solution with a concentration of 0.1 mol / L. After the mixed solution was left to stand for 12 hours, 552 μL of an aqueous solution of ascorbic acid with a concentration of 0.1 mol / L was added twice, with a...

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PUM

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Abstract

The invention relates to a preparation method of a visible / near-infrared light regulated plasmon chiral conversion nano structure, and belongs to the field of nano photonic material application. The invention aims to provide a chiral optical conversion composite structure based on optical response of a nano plasmon assembly. The chiral optical conversion effect driven by levorotatory or dextrorotatory circularly polarized light is obtained by designing and constructing a gold nanorod-connecting molecule-chiral molecule self-assembled nano composite structure, namely a molecule-mediated gold nanorod chiral dimer. Different from a traditional ultraviolet-driven molecular optical switch, the preparation method has the advantages that chiral optical conversion is realized by utilizing circularly polarized light in a biological tissue transmission window (650-900nm); under the resonance / non-resonance excitation mode of the nano plasmon assembly, the conversion effects of different chiralitycan be selectively realized; and the conversion of the chiral optical signal only needs milliwatt-level low-power laser energy input.

Description

technical field [0001] The invention belongs to the application field of nanophotonic materials, and utilizes left-handed / right-handed circularly polarized light in visible / near-infrared bands to control the plasmonic chiral optical activity of a gold nanorod self-assembly structure. [0002] technical background [0003] The use of circularly polarized light to realize dynamic chiral switching plays an important role in the research of chemistry and biology. Existing studies have successfully utilized circularly polarized light to achieve chiral switching at the molecular / supramolecular level. However, most molecules can only respond to incident light in the ultraviolet region, and the irradiation of ultraviolet light will inevitably cause damage to living cells. Therefore, it is very important to be able to achieve chirality switching in the near-infrared window that is friendly to organisms. [0004] In recent years, chiral plasmonic nanostructures represented by gold na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/00
CPCG02B5/008
Inventor 王荣瑶赵文静
Owner BEIJING INSTITUTE OF TECHNOLOGYGY