Flexible film surface micro/nano-structure and application thereof
A technology of micro-nano structure and flexible film, applied in the direction of micro-structure technology, micro-structure device, manufacturing micro-structure device, etc., can solve the problem of reducing the detection sensitivity of surface-enhanced Raman substrate, increasing the operation process, and the film-forming quality of self-assembled microspheres Drop and other problems, to achieve the effect of saving mechanical processing equipment
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Embodiment 1
[0054] (1) Preparation of microsphere template
[0055] 2ml of polystyrene (PS) microsphere suspension (purchased from Alfa Aisha, the suspension is a suspension formed by dispersing PS microspheres into deionized water, the mass percentage of the suspension is 4%) drop by drop Add to 20ml H + Concentration is in the sulfuric acid of 0.1mol / L, add 1ml concentration again and be the sodium dodecylsulfonate aqueous solution of 0.5wt%, by the surface tension of surfactant sodium dodecylsulfonate, microsphere forms arrangement on the surface of sulfuric acid Uniform and dense single-layer microsphere template; the particle diameter of the PS microsphere is about 500nm (standard deviation<3%).
[0056] (2) Preparation of flexible film with microspheres adhered
[0057] Dissolve 4ml of polydimethylsiloxane (PDMS) in 20ml of n-hexane, stir and mix to obtain a polymer solution; pour the polymer solution on the single-layer microsphere formwork described in step (1), and use polymeri...
Embodiment 2
[0068] (1) Preparation of monolayer microsphere template
[0069] Add 3ml of silica microsphere suspension (purchased from Sigma, the suspension is prepared by dispersing silica microspheres into ethanol) to 30ml of H +Concentration is in the nitric acid of 1mol / L, add 1ml concentration again and be the sodium dodecylsulfonate aqueous solution of 0.5wt%, by means of the surface tension of surfactant sodium dodecylsulfonate, microspheres form and arrange uniformly on the surface of nitric acid 1. A dense monolayer microsphere template; the particle size of the silica microsphere is about 300nm (standard deviation<3%).
[0070] (2) Preparation of flexible film with microspheres adhered
[0071] Dissolve 5ml of polymethyl methacrylate (PMMA) in 15ml of cyclohexane, stir and mix to obtain a polymer solution; pour the polymer solution on the single-layer microsphere formwork described in step (1), and use the polymerization The fluidity of the polymer solution makes it spread aut...
Embodiment 3
[0082] (1) Preparation of monolayer microsphere template
[0083] Add 2ml of Al2O3 microsphere suspension (purchased from Alfa Aisha, the suspension is formed by dispersing Al2O3 microspheres in deionized water) to 40ml of H + In hydrochloric acid with a concentration of 5mol / L, add 2ml of sodium lauryl sulfate aqueous solution with a concentration of 0.5wt%, and with the help of the surface tension of the surfactant, the microspheres form a uniformly arranged and dense monolayer microsphere template on the surface of the hydrochloric acid ; The particle size of the aluminum oxide microspheres is about 750nm (standard deviation <3%);
[0084] (2) Preparation of flexible film with microspheres adhered
[0085] 5ml polymethyl methacrylate (PMMA) is dissolved in 30ml benzene, stir and mix, obtain polymer solution; Polymer solution is poured on the single-layer microsphere formwork described in step (1), utilize polymer solution The fluidity makes it spread automatically; after ...
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