Surface-enhanced Raman substrate microspheres with micron size and preparation method thereof
A surface-enhanced Raman and surface-enhanced technology, which is applied in the field of composite materials, can solve the problems that cannot be distinguished and positioned one by one, cannot be moved to the designated position, and the individual cannot be operated, so as to reduce low reproducibility and inaccurate The effects of stability, uniform size, and good application prospects
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Embodiment 1
[0016] (1) Mix 5.0 g GMA, 1.0 g PVP, 87 mL ethanol, 13 mL ionized water, 0.1 g AIBN and fluorescent probe molecules, react at 70 °C for 12 h, centrifuge to separate the product, and then dry it in vacuum at 50 °C for 2 h obtains PGMA microspheres;
[0017] (2) Add 10 mg of PGMA microspheres obtained in step (1) to 50 mL of 5 mg AgNO 3 Add 0.05 g of cuprous oxide to the ethanol solution, then place it in a shaker, shake it at 50°C for 60 min, wash it with ethanol for 2-3 times after centrifugation, and dry it in vacuum at 50°C for 2 h to obtain PGMA / Ag- NPs substrate microspheres.
Embodiment 2
[0019] (1) Mix 5.0 g GMA, 1.0 g PVP, 87 mL ethanol, 13 mL ionized water, 0.1 g AIBN, and fluorescent probe molecules, react at 70 °C for 12 h, centrifuge to separate the product, and then dry it in vacuum at 50 °C for 2 h obtains PGMA microspheres;
[0020] (2) Add 10 mg of PGMA microspheres obtained in step (1) to 50 mL of 20 mg AgNO 3 Add 0.1 g of cuprous chloride to the ethanol solution, then place it in a shaker, shake it at 50°C for 60 min, wash it with ethanol for 2-3 times after centrifugation, and dry it in vacuum at 50°C for 2 h to obtain PGMA / Ag -NPs substrate microspheres;
Embodiment 3
[0022] (1) Mix 5.0 g GMA, 1.0 g PVP, 87 mL ethanol, 13 mL ionized water, 0.1 g AIBN, and fluorescent probe molecules, react at 70 °C for 12 h, centrifuge to separate the product, and then dry it in vacuum at 50 °C for 2 h obtains PGMA microspheres;
[0023] (2) Add 10 mg of PGMA microspheres obtained in step (1) to 50 mL of 50 mg AgNO 3 Add 0.4 g of n-butylamine to the ethanol solution, then place it in a shaker, shake it at 50°C for 60 min, wash it with ethanol for 2-3 times after centrifugation, and dry it in vacuum at 50°C for 2 h to obtain PGMA / Ag- NPs substrate microspheres;
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