Surface-enhanced Raman spectroscopy substrate and preparation method thereof
A surface-enhanced Raman and spectroscopy technology, applied in the field of Raman spectroscopy, can solve the problems of weak signal, complicated operation, expensive TERS technology equipment, etc., to achieve the effect of strong elasticity, high sensitivity, and enhanced enhancement effect.
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[0036] The preparation method of the surface-enhanced Raman spectrum substrate includes the following steps: 1) Treating the chewing gum to prepare a support body: using 30-40°C water to treat the chewing gum, and the treatment method is that the soaking process is accompanied by stretching and folding, and the treatment time is ≥0.5h;
[0037] 2) Loading metal particles: putting the support into the metal particle dispersion so that the metal particles are attached to the pore surfaces of the support to obtain the surface-enhanced Raman spectroscopy substrate.
[0038] Wherein, in step 1), heat treatment may be performed on the support obtained after the treatment to remove part of the moisture in the support.
[0039] Wherein, a modifier can also be added to the metal particle dispersion, so as to enhance the enhancement effect of the final substrate on the characteristic peaks of the probe molecules.
[0040] Wherein, in order to enable the metal particles to adhere more un...
Embodiment 1
[0045] First, the chewing gum is treated with water at 35°C. The treatment method is that the soaking process is accompanied by stretching and folding. The treatment time is 0.5h, and then heated on a heating plate at 35°C for 1h to obtain a support. Then, the silver particle dispersion with a volume of 10 mL, a particle size of 10 nm, and a concentration of 1 mmol / L was centrifuged at a speed of 10,000 rpm for 10 min, and then the supernatant was removed. Subsequently, KI aqueous solution with a volume of 10 uL and a concentration of 100 mmol / L was added to the silver particle dispersion after centrifugation concentration, and vortexed for 1 min. Finally, weigh about 0.3g of the support body and add it to the concentrated and modified silver particle dispersion, and heat it on a heating plate at 35°C. While heating, the support body is repeatedly folded and stretched with a glass rod Until the silver particles are all attached to the support body, the surface-enhanced Raman s...
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