Double-response gold nanomembrane based on SPR conversion, its preparation method and application
A gold nano, dual response technology, applied in the fields of nanotechnology, nanostructure manufacturing, nanotechnology for materials and surface science, can solve the problem of less dual response gold nanofilm, achieve large-scale implementation, repeatable Good performance and good mechanical properties
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[0044]Another aspect of the embodiments of the present invention also provides a method for preparing a double-response gold nanofilm based on SPR conversion, which includes:
[0045] Provide gold nanoparticles surface-modified with a double-responsive copolymer, and mix it with a water-phase liquid and a water-incompatible oil-phase liquid to form a mixed system;
[0046] adding a volatile reagent to the mixed system, so that the gold nanoparticles are induced to be trapped at the water-oil interface; and,
[0047] Adding a cross-linking agent to the water subphase of the mixed system, and then in the process of removing the oil phase liquid, the gold nanoparticles are self-assembled at the water-oil interface to form a large area and have self-supporting properties SPR conversion-based dual-response gold nanomembranes.
[0048] In some embodiments, the dual-responsive copolymer includes an alkoxyether dendron copolymer.
[0049] In more detail, the present invention modifi...
Embodiment 1
[0099] Example 1: Interfacial two-dimensional gold nanometer monolayer film with dual response SPR switching behavior
[0100] (1) Preparation of 40nm gold nanospheres: First, take 10 mL of trisodium citrate solution with a concentration of 33 mMol in 140 mL of deionized water, stir vigorously in an oil bath and heat to 137° C., keep the reaction for 15 min. Then, 1 mL of chloroauric acid solution with a concentration of 25 mM was quickly injected into the center of the vortex, and there was no obvious color change after the addition. After 1 min, 5 mL of 0.1 M Tris solution was quickly added at one time. After the addition, the solution quickly changed from colorless to light pink, and then rose red / peach red. Keep the temperature constant and react for 15 min. Next, lower the reaction temperature to 100°C, and quickly inject 1mL of 25mM chloroauric acid solution into the center of the vortex. After adding, the color of the solution changes from "more opaque" to transparent w...
Embodiment 2
[0105] (1) Preparation of 60nm gold nanospheres: First, take 10 mL of trisodium citrate solution with a concentration of 33 mMol in 140 mL of deionized water, stir vigorously in an oil bath and heat to 120° C., and keep the reaction for 10 min. Then, 1 mL of chloroauric acid solution with a concentration of 25 mM was quickly injected into the center of the vortex, and there was no obvious color change after the addition. After 1 min, 5 mL of 0.1 M Tris solution was quickly added at one time. After the addition, the solution quickly changed from colorless to light pink, and then rose red / peach red. Keep the temperature constant and react for 15 min. Next, lower the reaction temperature to 100°C, and quickly inject 1mL of 25mM chloroauric acid solution into the center of the vortex. After adding, the color of the solution changes from "more opaque" to transparent wine red in about 1min. Change, maintain the reaction for 20min. Finally, repeat the previous step. Keep the temper...
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