Three-dimensional arrangement nanoparticle film array structure and preparation method and application thereof
A nanoparticle and array structure technology, applied in the field of nanophotonics, can solve the problems of unable to excite surface lattice resonance, unable to generate coupling, affecting the improvement of surface lattice resonance quality factor, etc.
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[0037] The invention provides a method for preparing a three-dimensionally arranged nanoparticle film array structure, comprising the following steps:
[0038] (1) The nanoparticles are coated with hydrophobic molecules and then dispersed in an organic solvent to obtain a modified nanoparticle dispersion;
[0039] (2) surface-treating the three-dimensional template to obtain a hydrophilic three-dimensional template;
[0040] (3) adding water to the surface of the hydrophilic three-dimensional template to form a water film, adding the modified nanoparticle dispersion dropwise to the surface of the water film for self-assembly, and then removing the water film to obtain A three-dimensional nanoparticle film array structure arranged along a three-dimensional template;
[0041] Step (1) and step (2) are not in chronological order.
[0042] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those ski...
Embodiment 1
[0073] (1) Place gold nanosphere particles with a diameter of 35nm in water to obtain a dispersion of gold nanosphere particles with a concentration of 0.5 mg / mL; under a nitrogen environment, add 4 mg of thiolated polystyrene to 4 mL with stirring In tetrahydrofuran, a thiolated polystyrene solution was obtained; at room temperature and at a stirring speed of 500 r / min, 100 μL of gold nanosphere particle dispersion was added dropwise to the thiolated polystyrene solution, and left to stand for 12 hours. The obtained solid product was centrifuged and washed twice with chloroform at a speed of 4000 r / min to obtain modified nanoparticles;
[0074] (2) Dispersing the coated nanoparticles in chloroform to obtain a modified nanoparticle dispersion with a concentration of 30 mg / mL;
[0075] (3) Mix the PDMS prepolymer and the curing agent according to the mass ratio of 10:1, stir well and pour it into the glass fixture template, and then cure it in an oven at 80°C for 5 hours, and t...
Embodiment 2
[0084] According to the method of Example 1, a three-dimensionally arranged nanoparticle film array structure is prepared. The difference from Example 1 is that the three-dimensional template is a polystyrene wrinkled template;
[0085] The preparation of the polystyrene wrinkled template is as follows: ultrasonically treat the PS nanosphere water suspension with a particle size of 800 μm and a concentration of 2.5% w.t for 10 minutes, and mix the PS nanosphere water suspension with ethanol at a volume ratio of 1:1 Mix to obtain the PS nanosphere mixture; place the substrate on the bottom of the culture dish filled with deionized water, and then use the syringe pump to slowly inject the PS nanosphere mixture into the surface of the deionized water in the culture dish at a rate of 8 μL / min, so that The PS nanospheres are spread on the air / water interface, and then the deionized water is pumped out using a syringe pump, and the PS nanosphere monolayer film slowly falls on the sur...
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