Preparing method and application of self-assembly structures of gold and silver core-shell particles and gold nanometer rods
A gold-silver core-shell and gold nanorod technology, applied in the field of analytical chemistry, can solve problems such as inability to ensure accurate analysis, and achieve accurate quantitative results
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[0024] All glass instruments were soaked in aqua regia for 24h, washed with double distilled water, and dried for later use. The water used in the experiment was 18.2 MΩ Milli-Q ultrapure water.
[0025] (1) Synthesis of gold nanoparticles: Take 97.5mL of ultrapure water in a clean round bottom flask, add 2.5mL of 4g / L chloroauric acid solution, stir and mix with constant temperature magnetic force and heat to boiling, and keep boiling for 5 After -6 min, quickly add 2.0 mL of 1% trisodium citrate solution to the above mixed solution, and continue heating and stirring for 10 min until the solution is stable and translucent wine red. Finally, the reaction solution was cooled to room temperature and stored at 4 °C for future use, and gold nanoparticles with a particle size of about 18 nm were prepared.
[0026] (2) Synthesis of gold-silver core-shell particles: first, pre-synthesized 100 μL gold nanoparticles were centrifuged and resuspended in 5 mM phosphate buffer solution co...
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