Surface-enhanced Raman scattering apparatus and methods
A surface-enhanced Raman and inner surface technology, applied in Raman scattering, devices for coating liquid on the surface, measuring devices, etc., can solve problems such as inappropriateness and trouble
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[0057] As an example, Figure 16 Shown is the SERS spectrum of crystal violet, a widely used dye for showing SERS activity, obtained using a single SERS tube. Analytes were prepared as 10 ppm crystal violet in water. In the fabrication of SERS tubes, a colloidal solution of Au nanoparticles is first produced by femtosecond pulsed laser ablation of Au in a liquid solvent. The target was a sheet of metallic Au, and acetone was chosen as solvent because of its high volatility. During ablation, the target is immersed in acetone, and a colloid is formed directly in the acetone. The laser has a pulse energy of 10 microjoules, a pulse duration of 500 femtoseconds, and a repetition rate of 10 MHz. Notably, as previously discovered and disclosed in US Patent Application Serial No. 12 / 320,617, colloids can remain as stable suspensions for months without the need for additional stabilizing chemicals. The colloid was then injected into a glass tube with an inner diameter of 2 mm and a...
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