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A preparation method of surface plasmon self-assembled chiral structure based on light-controlled symmetry breaking

A surface plasmon and chiral structure technology, applied in optical components, optics, instruments, etc., can solve problems such as complex means, damage to living cells, and broken light-controlled symmetry, to overcome the chemical synthesis process, light source, etc. safe effect

Active Publication Date: 2022-04-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still very difficult to achieve photocontrolled symmetry breaking in the field of chemical synthesis, since the three-dimensional configuration of most molecular functional groups is an inherent property.
Only with the help of complex photocatalytic reactions, this type of chemical reaction has a long cycle and complicated means
More importantly, most molecules can only respond to incident light in the ultraviolet spectral region, and the irradiation of ultraviolet light will inevitably cause damage to living cells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1. Preparation of side-by-side self-assembled structure of gold nanorods

[0034] Wherein, the preparation process of gold nanorods is as follows:

[0035] 1. Gold Seed Preparation

[0036] 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;

[0037] 2. Growth medium preparation

[0038] 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

[0057] Step 1. Preparation of side-by-side self-assembled structure of gold nanorods

[0058] Wherein, the preparation process of gold nanorods is as follows:

[0059] 1. Gold Seed Preparation

[0060] 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;

[0061] 2. Growth medium preparation

[0062] 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

[0081] Step 1. Preparation of side-by-side self-assembled structure of gold nanorods

[0082] Wherein, the preparation process of gold nanorods is as follows:

[0083] 1. Gold Seed Preparation

[0084] 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;

[0085] 2. Growth medium preparation

[0086] 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 an...

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Abstract

The invention provides a method for controlling chiral symmetry breaking by visible / near-infrared light, which belongs to the application field of nano-photonic materials. The invention aims to provide a chiral symmetry-broken composite structure based on the optical response of the nano-exciton assembly. The chiral symmetry breaking effect driven by left-handed or right-handed circularly polarized light is obtained by designing and constructing a racemic mixed solution of chiral gold nanorod self-assembled composite structure. Different from the chiral symmetry breaking of the traditional ultraviolet light-driven molecule / supramolecular system, the present invention utilizes the circularly polarized light in the biological tissue transmission window (650-900nm) to realize the chiral symmetry breaking; Under the resonance / non-resonance excitation mode of the excitonic assembly, different chiral symmetry breaking effects can be selectively realized; the realization of the chiral symmetry breaking only requires milliwatt-level low-power laser energy input. The invention has high biocompatibility and simple synthesis steps, and can be well applied in the fields of light-controlled chiral recognition, light-controlled chiral separation and the like.

Description

technical field [0001] The invention belongs to the field of application of nanophotonic materials, and utilizes left-handed / right-handed circularly polarized light in visible / near-infrared bands to control the chiral symmetry breaking of gold nanorod self-assembly in vitro racemic mixed solution. [0002] technical background [0003] The use of circularly polarized light to achieve chiral symmetry breaking has important applications in chemical and biological research. Existing studies have successfully achieved symmetry breaking effects on racemic molecular / supramolecular systems using circularly polarized light. However, it is still very difficult to achieve photocontrolled symmetry breaking in the field of chemical synthesis, since the three-dimensional configuration of most molecular functional groups is an inherent property. Only with the help of complex photocatalytic reactions, this type of chemical reaction has a long cycle and complicated means. More importantly,...

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