Preparation method for sodium chloride assisted silver nano-particle self-assembled filter paper surface enhanced Raman spectrum base
A surface-enhanced Raman and silver nanoparticle technology, which is applied in Raman scattering, material excitation analysis, etc., can solve the problems of low sensitivity of silver nanoparticle SERS substrate and complicated manufacturing process, and achieve uniform signal response of the substrate and simple operation method , the effect of strong Raman signal
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specific Embodiment approach 1
[0016] Embodiment 1: In this embodiment, the preparation method of sodium chloride-assisted silver nanoparticle self-assembled filter paper surface-enhanced Raman spectroscopy substrate is implemented according to the following steps:
[0017] 1. Dissolve 45-65 mg of silver nitrate in 250 ml of ultra-pure water and boil, then add 5-10 ml of sodium citrate solution with a mass concentration of 1%, boil for 1-1.5 hours, then cool naturally to room temperature to obtain silver sol;
[0018] 2. Cut the filter paper into filter paper sheets, then soak them in a sodium chloride solution with a concentration of 0.1 to 0.5 mol / L, take out the filter paper sheets and dry them to obtain dry filter paper sheets;
[0019] 3. Put the dried filter paper sheet into the silver sol in step 1, soak it for 12h-72h, take it out, and dry it at room temperature to obtain the NaCl-assisted silver nanoparticle self-assembled filter paper surface-enhanced Raman spectrum substrate.
[0020] The sodium ...
specific Embodiment approach 2
[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step one, 45 mg of silver nitrate is dissolved in 250 ml of ultrapure water and boiled, and then 5 ml of sodium citrate solution with a mass concentration of 1% is added. Other steps and parameters are the same as those in Embodiment 1.
specific Embodiment approach 3
[0023] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the filter paper described in step 2 is a medium-speed quantitative filter paper. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.
[0024] In this embodiment, the filter paper is cut into triangles, ovals or rectangles.
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