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A kind of chiral assembly and its preparation method

An assembly and chirality technology, applied in chemical instruments and methods, transportation and packaging, metal processing equipment, etc., can solve the problems of being easily interfered by external factors, affecting PCD signals, and being difficult to control separately, achieving low price, Easy-to-obtain raw materials and easy-to-achieve effects

Active Publication Date: 2022-02-22
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the chiral molecular driving source and the assembly driving source are located in the same layer in space, they interact with each other, and it is not easy to achieve separate regulation; in addition, the chiral molecule is exposed to the solution environment, which is easily interfered by external factors and affects the PCD signal.

Method used

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  • A kind of chiral assembly and its preparation method
  • A kind of chiral assembly and its preparation method
  • A kind of chiral assembly and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0105] This embodiment provides a novel method for constructing a chiral assembly, the method comprising the following steps:

[0106] (1) Incubate the mixed solution of gold nanorods (aspect ratio of 2), surfactant (CTAB) and cysteine ​​at 25°C for 60min to obtain the mixed solution after incubation, in which the particle concentration of gold nanorods is 0.1nM, the concentration of surfactant is 2mM, and the concentration of cysteine ​​is 2μM;

[0107] (2) Centrifuge the hatched mixed solution obtained in step (1) at 9500 rpm for 15 minutes, then remove the supernatant, add a 10 mM aqueous solution of surfactant to the lower sediment, mix well, and Incubation at lower temperature for 60 minutes to obtain hatching solution;

[0108] (3) Add silver nitrate, chloroauric acid, and ascorbic acid to the incubation solution of step (2), and grow on the surface of gold nanorod particles for another 90 min in a water bath at 60° C. to obtain a nanoparticle solution, wherein the conc...

Embodiment 2

[0112] This embodiment studies the influence of the concentration of ascorbic acid on the chiral driving source, which involves the regulation of local hotspots in the core-shell interface region. The method includes the following steps:

[0113] (1) The mixed solution of gold nanorod particles (length-to-diameter ratio is 3.08), surfactant (CTAB), and cysteine ​​was incubated at 30°C for 30 minutes to obtain the mixed solution after incubation, in which gold nanorods The particle concentration is 0.1nM, the surfactant concentration is 10mM, and the cysteine ​​concentration is 2μM;

[0114] (2) Centrifuge the hatched mixed solution obtained in step (1) at 9500 rpm for 15 minutes, then remove the supernatant, add a 10 mM aqueous solution of surfactant to the lower layer of sediment, mix well, and heat Incubate for 30 minutes to obtain the hatching solution;

[0115] (3) Add silver nitrate, chloroauric acid and ascorbic acid of different concentrations to the hatching solution ...

Embodiment 3

[0120] This embodiment studies the impact of cysteine ​​concentration on the chiral driving source, involving the size and spatial position of the chiral driving source, and the method includes the following steps:

[0121] (1) Incubate a mixed solution of gold nanorod particles (aspect ratio of 3.08), surfactant (CTAB) and cysteine ​​at 30°C for 30 min to obtain a mixed solution after incubation, in which the gold nanorod particles The concentration is 0.1nM, the concentration of the surfactant is 10mM, and the concentration of cysteine ​​is 1-100μM;

[0122](2) Centrifuge the hatched mixed solution obtained in step (1) at 9500rpm for 15min, remove the supernatant, add a 10mM aqueous solution of surfactant to the lower sediment, mix well and incubate at 30°C for 30min to obtain hatching fluid;

[0123] (3) Silver nitrate, chloroauric acid and ascorbic acid of different concentrations are added to the hatching solution obtained in step (2), and after being shaken rapidly, the...

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Abstract

The invention provides a chiral assembly and a preparation method thereof. The chiral assembly comprises nanorod particles of a core-shell structure arranged side by side and a connecting layer arranged on the surface of the nanorod particles of the core-shell structure; The chiral assembly uses the method of spatial separation to separate the chiral driving layer in the chiral assembly layer and the assembly layer responsible for the assembly in space, so as to better construct the chiral unit and achieve a more stable assembly and PCD signal; The preparation method of the sexual assembly is simple, the raw materials are easy to obtain, the price is low, and it is convenient to realize.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and relates to a chiral assembly and a preparation method thereof. Background technique [0002] Plasmonic circular dichroism (PCD) can transfer the signal of difficult-to-detect chiral molecules located in the deep ultraviolet region to the localized surface plasmon resonance (LSPR) of nanoparticles in the ultraviolet-visible region. thus receiving more attention. [0003] At present, there are two main sources of plasmonic circular dichroism: structural plasmonic circular dichroism and induced plasmonic circular dichroism. Among them, structural plasmonic circular dichroism obtains a strong and stable signal by constructing a chiral assembly structure of plasmonic nanoparticles, which has attracted more attention than the weak signal induced by PCD. [0004] At present, most structural PCD uses chiral macromolecules as templates to assemble nanoparticles into chiral structures, which can be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/102B22F1/054B22F1/17B22F9/24B01J31/02B82Y30/00B82Y40/00
CPCB22F9/24B01J31/0254B01J31/0271B82Y30/00B82Y40/00B22F1/07B22F1/102B22F1/054B01J35/396
Inventor 孟德静吴晓春
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA