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Tetrahydrofuran-induced gold nanorod controllable assembly and preparation method thereof

A technology of gold nanorods and tetrahydrofuran, applied in the field of application, can solve the problems of inability to realize the adjustment of optical characteristics, uncontrollable particle distance, low assembly yield, etc., and achieve the effect of short assembly time, low cost and high strength

Inactive Publication Date: 2014-12-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above-mentioned method of constructing gold nanorod self-assembly usually requires chemical modification of the tip of the gold rod, the process is complicated, the assembly form is single, the particle distance is uncontrollable, and the optical characteristics cannot be adjusted in a wide range of wavelength bands. The rate is low, and there is also the shortcoming that the cost of preparation is high

Method used

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  • Tetrahydrofuran-induced gold nanorod controllable assembly and preparation method thereof
  • Tetrahydrofuran-induced gold nanorod controllable assembly and preparation method thereof
  • Tetrahydrofuran-induced gold nanorod controllable assembly and preparation method thereof

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Effect test

Embodiment 1

[0033] 28-30°C, add 375 μL of tetrahydrofuran to 3 mL of fresh gold nanorod solution (the concentration of gold nanorods is 0.0075 mg / mL, tetrahydrofuran: water = 1:8, v / v), mix well, and let stand After 1 hour, centrifuge, remove the supernatant solution of the centrifuge tube, and obtain the side-by-side assembly sample. The color, transmission electron microscope picture and absorption spectrum of the sample before centrifugation are as follows: figure 2 (e), image 3 As shown in (A) and (B), it can be seen that most of the obtained samples have been assembled side by side (dimer, trimer).

Embodiment 2

[0035] 28-30°C, add 386 μL of tetrahydrofuran to 3 mL of fresh gold nanorod solution (the concentration of gold nanorods is 0.0075 mg / mL, tetrahydrofuran: water = 1:7, v / v), mix well, and let stand After 50 minutes, centrifuge, remove the supernatant solution of the centrifuge tube, and obtain the side-by-side assembly sample.

Embodiment 3

[0037] 28-30°C, add 500 μL of tetrahydrofuran to 3 mL of fresh gold nanorod solution (the concentration of gold nanorods is 0.0075 mg / mL, tetrahydrofuran: water = 1:6, v / v), mix well, and let stand After 40 minutes, centrifuge, remove the supernatant solution of the centrifuge tube, and obtain the side-by-side assembly sample. The color, transmission electron microscope picture and absorption spectrum of the sample before centrifugation are as follows: figure 2 (g), Figure 4 (A) and (B) shown. It can be seen that most of the obtained samples have been assembled side by side (multimers).

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Abstract

The invention discloses a tetrahydrofuran-induced gold nanorod controllable assembly and a preparation method thereof. The distances among gold nanorods of the assembly are 2-5 nanometers; and an assembly mode comprises a side-by-side assembling way, a head-to-head assembling way and a linking way. The preparation method comprises the following steps of: putting a fresh purified gold nanorod solution into a transparent container, adding a tetrahydrofuran solution, standing for 30-60 minutes, and centrifugally removing a supernatant to obtain an assembly consisting of side-by-side gold nanorods; and adding 3-thiohydracrylic acid, adding an alkali for adjusting the pH to 9-10, and centrifugally separating to obtain a precipitant, i.e., an assembly consisting of head-to-head gold nanorods. Due to the adoption of the tetrahydrofuran-induced gold nanorod controllable assembly, form singleness of liquid phase assembly is broken through, an experimental foundation is laid for the realization of mono-molecular detection, and adjustability of the optical character in a large-range waveband is realized; and the preparation method has a simple process, and is low in cost.

Description

technical field [0001] The invention relates to the photoelectric properties of noble metal nanomaterials and their light-to-heat conversion in medical and other application fields, wherein the preparation of gold nanorod assemblies with adjustable optical properties is the basis. Background technique [0002] The development and transformation of modern technology largely depends on the generation of existing materials and new materials. With the rapid development of nanoscience, breakthroughs have been made in the controllable growth and properties of nanostructured monomers. Noble metal nanostructures (especially Au nanorods) have excellent physical and chemical properties, and have shown great application value in many technical fields. Their good stability, low biological toxicity, bright colors and applications in new energy research, life sciences, sensors, optical components, nano-optoelectronics, optical information storage and other fields have attracted much atte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/62B22F9/24C30B29/02C30B7/14
Inventor 阚彩侠柯善林从博
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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