Optical probe based on gold nanoparticle efficient assembly structure, and preparation method and application of optical probe
A gold nanoparticle, optical probe technology, applied in measurement devices, scientific instruments, instruments, etc., can solve the problems of long detection time, poor probe fluidity, etc., to improve detection sensitivity, good stability and resistance. Effects of Interference Ability
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Embodiment 1
[0048] 1. Synthesis of gold nanoparticles:
[0049] Take 824 μL tetrachloroauric acid stock solution (1g tetrachloroauric acid dissolved in 4mL ethanol) in a 50mL three-necked flask, drain the ethanol, keep the bottle full of argon after degassing, then add 25mL toluene, 2.5 mL oleylamine, stirred rapidly at 100°C for 6h. After the reaction, an equal volume of ethanol was added, and after shaking, a precipitate was formed, then centrifuged, and the obtained precipitate was dissolved in 10 mL of chloroform, and set aside.
[0050] 2. Synthesis of thiol dendritic mesoporous silica sphere template:
[0051] First, 68 mg of TEA was added to 25 mL of water and stirred at 80° C. for 30 minutes, then 380 mg of CTAB and 168 mg of sodium salicylate were added and stirred for 1 hour. 4 mL of TEOS was injected into the above solution, and stirred slowly at 80° C. for 4 hours. The product was centrifuged and washed three times with ethanol, and finally dispersed in a mixed solution of ...
Embodiment 2
[0059] 1. Synthesis of gold nanoparticles:
[0060] Take 824 μL tetrachloroauric acid stock solution (1g tetrachloroauric acid dissolved in 4mL ethanol) in a 50mL three-necked flask, drain the ethanol, keep the bottle full of argon after degassing, then add 37.5mL toluene, 3.75mL oleylamine was stirred rapidly at 110°C for 6h. After the reaction, an equal volume of ethanol was added, and after shaking, a precipitate was formed, then centrifuged, and the obtained precipitate was dissolved in 10 mL of chloroform, and set aside.
[0061] 2. Synthesis of thiol dendritic mesoporous silica sphere template:
[0062] First, 68 mg of TEA was added to 25 mL of water and stirred at 80° C. for 30 minutes, then 380 mg of CTAB and 168 mg of sodium salicylate were added and stirred for 1 hour. 4 mL of TEOS was injected into the above solution and stirred slowly at 80 °C for 4 hours, the product was centrifuged and washed 3 times with ethanol. The above experiments were repeated, and the f...
Embodiment 3
[0070] 1. Synthesis of gold nanoparticles:
[0071] Take 824 μL tetrachloroauric acid stock solution (1g tetrachloroauric acid dissolved in 4mL ethanol) in a 50mL three-necked flask, drain the ethanol, keep the bottle full of argon after degassing, then add 25mL toluene, 2.5 mL of oleylamine was stirred rapidly at 110°C for 6h. After the reaction, an equal volume of ethanol was added, and after shaking, a precipitate was formed, then centrifuged, and the obtained precipitate was dissolved in 10 mL of chloroform, and set aside.
[0072] 2. Synthesis of thiol dendritic mesoporous silica sphere template:
[0073] First, 68 mg of TEA was added to 25 mL of water and stirred at 80° C. for 30 minutes, then 380 mg of CTAB and 218 mg of sodium salicylate were added and stirred for 1 hour. 4 mL of TEOS was injected into the above solution, and stirred slowly at 80° C. for 3 hours. The product was centrifuged and washed three times with ethanol, and finally dispersed in a mixed soluti...
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