A surface-enhanced Raman scattering substrate and its preparation method
A surface-enhanced Raman and substrate technology, applied in the fields of biophotonics and nanophotonics, can solve the problems of no practical progress and achieve the effect of improving SERS enhancement ability and high sensitivity
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Embodiment 1
[0034]A surface-enhanced Raman scattering substrate, the substrate is a layered structure, followed by a glass flake layer, a silver nanoparticle layer (its particle size is 10nm) and a sheet-like Ti 2 The N layer, the silver nanoparticle layer and the glass flake layer are connected by electrostatic interaction, and the flake Ti 2 The N layer is deposited directly on the silver nanoparticle layer.
[0035] A method for preparing a surface-enhanced Raman scattering substrate, the method comprising the following steps:
[0036] 1. Preparation of silver colloidal solution: Dissolve 11mg of silver nitrate in 61.25ml of deionized water, heat and stir until boiling, then add 1.25ml, 1wt% trisodium citrate dihydrate solution, continue to react for 50min, stop heating, and cool down naturally Obtain silver colloidal solution, stand-by;
[0037] 2. Preparation of monolayer Ti 2 N solution: ball mill titanium powder and aluminum nitride at a ratio of 2:1 for 6 hours, heat the mixtur...
Embodiment 2
[0045] A surface-enhanced Raman scattering substrate, the substrate is a layered structure, followed by a glass flake layer, a gold nanoparticle layer (particle size is 100nm) and a sheet-like Ti 2 The N layer, the gold nanoparticle layer and the glass sheet layer are connected by electrostatic interaction, and the flake Ti2N layer is directly deposited on the gold nanoparticle layer.
[0046] A method for preparing a surface-enhanced Raman scattering substrate, the method comprising the following steps:
[0047] 1. Preparation of gold colloidal solution: Add 100ul of 10% chloroauric acid solution into 100ml of deionized water, heat and stir until boiling, then add 4ml of 1wt% trisodium citrate dihydrate solution, continue the reaction for 50 minutes, then stop heating , to obtain gold colloidal solution after natural cooling, and stand-by;
[0048] 2. Preparation of monolayer Ti 2 N solution: ball mill titanium powder and aluminum nitride at a ratio of 3:1 for 8 hours, heat...
Embodiment 3
[0056] A surface-enhanced Raman scattering substrate, the substrate is a layered structure, followed by a glass flake layer, a gold nanoparticle layer (with a particle size of 500nm) and a flaky Ti layer from bottom to top. 2 The N layer, the gold nanoparticle layer and the glass sheet are connected by electrostatic interaction, and the flake Ti 2 The N layer is deposited directly on the gold nanoparticle layer.
[0057] A method for preparing a surface-enhanced Raman scattering substrate, the method comprising the following steps:
[0058] 1. Preparation of gold colloidal solution: Add 100ul of 10% chloroauric acid solution into 100ml of deionized water, heat and stir until boiling, then add 4ml of 1wt% trisodium citrate dihydrate solution, continue the reaction for 50 minutes, then stop heating , to obtain gold colloidal solution after natural cooling, and stand-by;
[0059] 2. Preparation of monolayer Ti 2 N solution: ball mill titanium powder and aluminum nitride at a r...
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