Surface enhanced Raman scattering substrate material and preparation method and application thereof
A surface-enhanced Raman and substrate material technology, applied in the field of materials, can solve problems such as strong fluidity, difficult SERS detection, and low gas density, and achieve high activity, simple synthesis process, and high sensitivity
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[0094] According to the method for preparing the above-mentioned surface-enhanced Raman scattering substrate material according to the embodiment of the present invention, firstly, because the hollow structure of the metal-organic framework is conducive to the rapid gas replacement process in the Raman response region, the detection speed of the material for gas molecules is reduced. fast, and due to the enrichment effect of the hollow structure on gas molecules, the adsorption and detection of trace gas molecules can be realized; second, the modified functionalized molecules of the present invention and lung cancer respiratory markers (such as 3-ethylbenzaldehyde, benzene Formaldehyde, salicylaldehyde and glutaraldehyde, etc.) have high binding activity, which can realize the rapid capture of aldehyde molecules, making the surface-enhanced Raman scattering substrate material more sensitive to the above-mentioned respiratory markers of lung cancer, thereby realizing the detectio...
Embodiment 1
[0107] 1) Synthesis of gold superparticles
[0108] Under the protection of inert gas, 0.1gHAuCl 4 ·3H 2 O was added to 20 mL of oleylamine and n-hexane solution (v油胺 :v 正己烷 =1:1), after stirring for 30min at room temperature, quickly add 2mL of borane-tert-butyl complex oleylamine / n-hexane (v 油胺 :v 正己烷 =1:1) mixed solvent, the molar ratio of borane-tert-butyl complex to chloroauric acid is 1:1; after stirring at room temperature for 1 hour, centrifuge at 8000rpm for 5 minutes to collect the purple-red product and wash it with ethanol, Obtain gold nanoparticles; Mix 1mL of the organic phase (5mg / mL) containing gold nanoparticles with 1mL of the aqueous phase (20mg / mL) containing dodecyltrimethylammonium bromide surfactant, and vortex for 1min form microemulsions. At 70°C, the organic phase was removed to form a single-phase suspension of superparticles. 1 mL of the suspension containing the superparticle structure was mixed with 1 mL of a 20 mg / mL protective agent (polyv...
Embodiment 2
[0120] 1) Synthesis of gold superparticles
[0121] Under the protection of inert gas, 0.2gHAuCl 4 ·3H 2 O was added to 50 mL of oleylamine and n-hexane solution, and after stirring at room temperature for 20 min, 2 mL of borane-tert-butyl complex oleylamine / n-hexane (v 油胺 :v 正己烷 =1:1) mixed solvent, the molar ratio of borane-tert-butyl complex to chloroauric acid is 2:1; after stirring at room temperature for 1 hour, centrifuge at 8000rpm for 8 minutes to collect the gray-purple product and wash it with ethanol , to obtain gold nanoparticles; 1 mL of organic phase (5 mg / mL) containing nanoparticles was mixed with 1 mL of aqueous phase (20 mg / mL) containing tetradecyltrimethylammonium bromide surfactant, and vortexed for 2 min form microemulsions. At 60°C, the organic phase was removed to form a single-phase suspension of superparticles. 1 mL of the suspension containing the superparticle structure was mixed with 1 mL of a 10 mg / mL protective agent (polyvinylpyrrolidone w...
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