Simple small-size gold nanoparticle star with regulatable branch lengths and preparing method of gold nanoparticle star

A small-sized gold nanotechnology, applied in nanotechnology, metal processing equipment, transportation and packaging, etc., can solve the difficulty of regulating gold nanostars, achieve excellent light-to-heat conversion efficiency, excellent SERS performance, and preparation methods Efficient effect

Active Publication Date: 2016-06-15
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process emphasizes the use of a single wavelength of ultraviolet light to shorten the gold nanorods. However, although t...

Method used

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  • Simple small-size gold nanoparticle star with regulatable branch lengths and preparing method of gold nanoparticle star
  • Simple small-size gold nanoparticle star with regulatable branch lengths and preparing method of gold nanoparticle star
  • Simple small-size gold nanoparticle star with regulatable branch lengths and preparing method of gold nanoparticle star

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1) Preliminary preparation of reactants. Include the following steps:

[0049] 101) Prepare one 50mL and 10mL graduated cylinder, one 500mL beaker, two 50mL beakers, glass rod, jar, 50mL plastic centrifuge tube, 10mL stoppered graduated test tube, pipette gun, and plastic dropper. The glass container was ultrasonically cleaned with alcohol and ultrapure water in sequence.

[0050] 102) Prepare 50 mL of HEPES solution with a concentration of 100 mM, 20 mL of NaOH solution with a concentration of 1 M, and HAuCl with a concentration of 10 mM 4 Solution 10mL. Add 10mL of NaOH solution dropwise to the HEPES solution to adjust the pH to 7.4. HAuCl 4 Placed in a 10mL stoppered graduated test tube. Put the pH-adjusted HEPES in a jar.

[0051] 2) Utilize the "one-step growth method" to directly prepare gold nanostars, including the following steps:

[0052] 201) Measure 10 mL of HEPES solution into a 50 mL beaker, place it on a magnetic stirrer and stir continuously. Add ...

Embodiment 2

[0055] 1) Preliminary preparation of reactants. Include the following steps:

[0056] 101) Prepare one 50mL and 10mL graduated cylinder, one 500mL beaker, two 50mL beakers, glass rod, jar, 50mL plastic centrifuge tube, 10mL stoppered graduated test tube, pipette gun, and plastic dropper. The glass container was ultrasonically cleaned with alcohol and ultrapure water in sequence.

[0057] 102) Prepare 50 mL of HEPES solution with a concentration of 100 mM, 20 mL of NaOH solution with a concentration of 1 M, and HAuCl with a concentration of 10 mM 4 Solution 10mL. Add NaOH solution dropwise to the HEPES solution to adjust the pH to 7.4. HAuCl 4 Placed in a 10mL stoppered graduated test tube. Put the pH-adjusted HEPES in a jar.

[0058] 2) Preparation of gold nanostars by light irradiation. Include the following steps:

[0059] 201) Measure 9mL of HEPES solution into a 50mL beaker, place it on a magnetic stirrer under a xenon lamp, add a magnetic vibrator into the beaker, ...

Embodiment 3

[0062] 1) Preliminary preparation of reactants. Include the following steps:

[0063] 101) Prepare one 50mL and 10mL graduated cylinder, one 500mL beaker, two 50mL beakers, glass rod, jar, 50mL plastic centrifuge tube, 10mL stoppered graduated test tube, pipette gun, and plastic dropper. The glass container was ultrasonically cleaned with alcohol and ultrapure water in sequence.

[0064] 102) Prepare 50 mL of HEPES solution with a concentration of 100 mM, 20 mL of NaOH solution with a concentration of 1 M, and HAuCl with a concentration of 10 mM 4 Solution 10mL. Add NaOH solution dropwise to the HEPES solution to adjust the pH to 7.4. HAuCl 4 Placed in a 10mL stoppered graduated test tube. Put the pH-adjusted HEPES in a jar.

[0065] 2) Preparation of gold nanostars by light irradiation. Include the following steps:

[0066] 201) Measure 10 mL of HEPES solution into a 50 mL beaker, place it on a magnetic stirrer under a xenon lamp, add a magnetic vibrator into the beake...

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Abstract

The invention belongs to the field of regulation of preparing of a precious metal nanometer system, and relates to a simple small-size gold nanoparticle star with the regulatable branch lengths and a preparing method of the gold nanoparticle star. A one-step growth method is used for preparing the gold nanoparticle star, and in the preparing process, light irradiation is added, so that the small-size gold nanoparticle star is obtained; and regulation of the branch lengths of the gold nanoparticle star is achieved. According to the preparing method, a commonly-used biological buffer solution reagent-HEPES is used for serving as a reduction agent, a stabilizing agent and a shape inductive agent of the system; and after the pH value of the system is adjusted to range from 7.0 to 7.5, a certain amount of chloroauric acid (HAuC14) is directly added, light radiation with different wave lengths is added, and after a time, the small-size gold nanoparticle star with different branch lengths can be formed. The method is easy, efficient and environment-friendly in operation, and the small-size gold nanoparticle star with the different branch lengths and good stable dispersion performance is obtained.

Description

technical field [0001] The invention belongs to the field of preparation and regulation of noble metal nanosystems, and relates to a simple small-sized gold nano-star with adjustable branch length and a preparation method thereof. Background technique [0002] Gold nanostar (goldnanostar) is a kind of multi-branched nanoparticles with tip structure. Due to the irregular tip structure and large specific surface area of ​​gold nanostars, it has remarkable scattering ability. At the same time, gold nanostars have a large molar extinction coefficient, and the incident electromagnetic radiation can easily penetrate the tip structure of gold nanostars, so that gold nanostars have excellent photothermal conversion efficiency. Gold nanostars have very excellent surface-enhanced Raman scattering (Surface-Enhanced Raman Scattering, SERS) effect, so they are ideal materials for assembling SERS substrates. [0003] At present, the most commonly used methods for preparing gold nanostar...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
CPCB82Y40/00B22F9/24B22F2999/00B22F1/0553B22F1/054B22F2202/11
Inventor 赵艳史娜娜郭孟扬蒋毅坚
Owner BEIJING UNIV OF TECH
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