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Method and device for enhancing fluorescence intensity of gold nanosphere

A technology of gold nanospheres and fluorescence intensity, applied in the field of nanomaterials and optics, can solve the problems of difficult industrial production, limited enhancement effect, complicated operation, etc., and achieve the effect of low cost, enhancement effect and simple process

Inactive Publication Date: 2019-04-09
SHANXI UNIV
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  • Claims
  • Application Information

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Problems solved by technology

These methods all have certain limitations. For example, the acquisition of dimers requires precise operation of large-scale scientific instruments, which is expensive, complicated to operate, and difficult to be used

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  • Method and device for enhancing fluorescence intensity of gold nanosphere
  • Method and device for enhancing fluorescence intensity of gold nanosphere
  • Method and device for enhancing fluorescence intensity of gold nanosphere

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Example Embodiment

[0025] Example 2

[0026] The method for enhancing the fluorescence intensity of gold nanospheres in this embodiment includes the following steps:

[0027] 1) Preparation of agglomerated gold nanosphere sample 4:

[0028] Take a cover glass, wash it with acetone, potassium hydroxide, and deionized water, and spin-coat the gold nanosphere solution on the cover glass by spin coating to prepare agglomerated gold nanosphere samples.

[0029] The thickness of the cover glass is 0.17 mm.

[0030] The gold nanospheres are prepared by a seed-mediated growth method, the diameter of the obtained gold nanospheres is about 160 nanometers, and the optical density of the gold nanosphere solution used for spin coating is 0.005.

[0031] The specific parameters of the spin coating method are: ① first spin coating at 500 rpm for 10 seconds; ② then spin coating at 2000 rpm for 20 seconds; ③ finally spin coating at 500 rpm for 10 seconds second.

[0032] figure 2 The transmission electron microscope chara...

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Abstract

The invention belongs to the field of nanomaterials and optics, in particular to a method for enhancing the fluorescence intensity of a gold nanosphere. The continuous laser is focused on the agglomerated gold nanosphere particles (4) having a diameter of 150 to 170 nm to excite the agglomerated gold nanosphere particles (4) to obtain fluorescence of the gold nanosphere. The fluorescence of the gold nanosphere increases as the laser irradiation time increases. The best enhancement effect is obtained when the laser irradiation time is 4.5 seconds. The fluorescence then decreases as the laser irradiation time increases. The invention also relates to a device for enhancing the fluorescence intensity of the agglomerated gold nanosphere by continuous laser irradiation. According to the method and device for enhancing the fluorescence intensity of the gold nanosphere, by irradiating the agglomerated gold nanosphere with a near-ultraviolet continuous laser, the adjacent gold nanospheres are welded under the action of photothermal effect so as to produce a strong localized surface plasmon enhancement effect, which enhances the fluorescence intensity of the gold nanosphere by more than 150times.

Description

technical field [0001] The invention belongs to the field of nanomaterials and optics, and specifically relates to a method and a device for enhancing the fluorescence intensity of agglomerated gold nanospheres irradiated by continuous laser light. Background technique [0002] Noble metal nanoparticles, such as gold nanospheres, have unique physical and chemical properties, such as excellent photothermal properties, excellent stability, biological non-toxicity, efficient catalytic properties and biocompatibility, making them widely used in many fields. have a wide range of applications. In particular, the localized surface plasmon enhancement effect of gold nanoparticles enables it to greatly enhance the linear and nonlinear optical responses of materials adjacent to gold nanoparticles (usually around 10 nanometers), and has been applied on the surface Enhanced Raman spectroscopy, two-photon fluorescence, double frequency acquisition and other scientific research and daily...

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Application Information

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IPC IPC(8): G01N21/64
CPCG01N21/64G01N2021/6417
Inventor 秦成兵张晓荣张国锋高岩陈瑞云肖连团贾锁堂
Owner SHANXI UNIV
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