Method for preparing surface-enhanced Raman spectroscopy substrate of silver self-assembly under assistance of amino acids
A Raman spectroscopic substrate and amino acid technology, which is applied in the photoengraving process of the pattern surface, Raman scattering, opto-mechanical equipment, etc., can solve the problem of poor signal uniformity, complex preparation process, and sensitivity of the nano-silver surface-enhanced Raman spectroscopic substrate. Low problems, to achieve the effect of fast and accurate signal searching, high detection sensitivity, and strong Raman signal
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[0020] Specific embodiment 1: The preparation method of the amino acid-assisted silver self-assembly surface enhanced Raman spectroscopy substrate of this embodiment is carried out according to the following steps: 1. Weigh 100 to 150 parts of distilled water, 10 parts by volume ~15 parts of 0.1~1mol / L AgNO 3 Solution, 1~5 parts of 0.01~0.1mol / L amino acid solution and 10~15 parts of 0.5~1.5mol / L ascorbic acid solution; 2. Weigh the distilled water and AgNO from step 1 3 The solution and the amino acid solution are put into a round-bottomed flask and stirred at a speed of 300 to 1500 revolutions / min for 5 to 15 minutes under a water bath at 0°C to 5°C. Then, add the ascorbic acid solution weighed in step 1 to Stir at a speed of 1500 revolutions / min for 10-20 minutes to obtain a solid-liquid mixture; 3. Centrifuge the solid-liquid mixture obtained in step 2 at a speed of 2000-10000 revolutions / min, collect the solid phase, and then combine the solid phase The substance is placed ...
Example Embodiment
[0026] Specific embodiment two: this embodiment is different from specific embodiment one in that the amino acids in the amino acid solution are glycine, alanine, histidine, glutamine, asparagine, aspartic acid, glutamic acid, and va Acid, leucine, isoleucine, phenylalanine, proline, tryptophan, serine, tyrosine, cysteine, methionine, threonine, lysine or arginine. Other steps and parameters are the same as in the first embodiment.
Example Embodiment
[0027] Specific embodiment three: this embodiment is different from specific embodiments one to two in that, according to the volume ratio described in step one, 120 to 130 parts of distilled water and 12 to 13 parts of 0.5 to 0.7 mol / L AgNO are weighed. 3 Solution, 3~4 parts of 0.05~0.07mol / L amino acid solution and 12~13 parts of 0.8~1.2mol / L ascorbic acid solution. The other steps and parameters are the same as those in the first to second embodiments.
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