A kind of preparation method of SERS chip
A chip and pit technology, applied in the field of SERS chip preparation, can solve the problems of high cost, difficulty in large-scale preparation, cumbersome hydrochloric acid cleaning operation, etc., and achieve the effect of low cost, stable properties and simple preparation method
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Embodiment 1
[0053] (1) Mix chloroauric acid aqueous solution (0.01M, 0.5ml) with dodecyltrimethylammonium chloride solution (0.1M, 19ml) evenly. Quickly inject the newly prepared sodium borohydride aqueous solution (0.01M, 1mL) into the above solution, and shake vigorously for 5 minutes. Use after 2 hours at room temperature.
[0054] (2) Take cetyltrimethylammonium bromide CTAB solution (0.1M, 4mL), slowly add dodecylbenzenesulfonic acid solution (0.05M, 4mL), add chloroauric acid solution (0.01M, 2mL ), added silver nitrate solution (0.01M, 0.4mL), then added hydrochloric acid solution (1M) to adjust the pH of the solution to 1.9, added ascorbic acid solution (0.1M, 0.32mL), and stabilized at room temperature for a certain period of time to obtain a colorless solution. Finally, 0.1 mL of the gold seed solution prepared in step (1) of aging for 2 hours was quickly injected into the growth solution, and grown at 20°C for 24 hours to obtain gold nanorods, 20*80nm.
[0055] (3) The templa...
Embodiment 2
[0057] Mix 0.1 ml of 25 mM chloroauric acid aqueous solution with 10 ml of 0.1 M dodecyltrimethylammonium bromide solution evenly. Take the newly prepared aqueous solution of sodium borohydride, 0.01M, 0.6mL and quickly inject it into the above solution, and shake vigorously for 2 minutes. Use after 2 hours at room temperature.
[0058] Dissolve 0.6g of dodecyltrimethylammonium chloride in 25ml of water. Constant temperature 30 degrees Celsius. Inject 0.5ml of 10mM silver nitrate solution, add 1ml of 25mM chloroauric acid solution, add 24ml of water, and stir at 30°C for 15min. The pH was adjusted to 2 by adding appropriate HCl. Add 80 microliters of 1M ascorbic acid under vigorous stirring, and stir for 30 seconds. Quickly inject 80 μl of the above seed solution. After stirring for 30s. Stand still for 12h. Nanorods of 80*38nm were obtained.
[0059] The template prepared by nanoimprinting (pore diameter 50 nm, pore depth 70 nm, honeycomb configuration) was cut into 5...
Embodiment 3
[0061] The SERS substrate that embodiment 1 obtains is soaked in 10 -4 mol / L pyridine solution for 30min, take it out and dry it in the air. Different points of the substrate were tested and obtained as image 3 The SERS spectrum of pyridine.
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