Is there is correlation between the Uv absorption intensity of the metallic film at specific wavelength for example 532 nm and the SERS activity detection of dye molecule carried out using green laser, wavelength 532 nm. I have prepared Au films using Sputtering method and i used this film for SERS detection of Rh B using 532 nm laser, the film that showed the best SERS, hasn't the maximum Uv absorption intensity at 532 nm. How i correlate between the optical properties of these films and the SERS activity? Thanks in advance
The phenomenon of SERS is widely used in analytical practice to determine the presence of a substance and its quantity in various mixtures, products. A huge intensity and its dependence on concentration is used. However, the nanometall / dye pair and the laser wavelength must be matched to each other. Therefore, it is difficult to give a definite answer to your.
The D-line of the sodium atom is narrow 590 nm. Cluster 3 already has a band with a maximum of 560 nm. Cluster 8 has a wide band of 500 nm. A nanoparticle with a diameter of less than 10 nm has a wide band of 560 nm. The intensity of the absorption of a thin film with a thickness of 10 nm is proportional to the wavelength. In the visible region, the spectrum becomes unstructured. Such a spectrum reflects the optical properties of free electrons of a metal. Perhaps your system is all going differently. The SERS was discovered on silver rough films.
Thank you very much Prof. Yuri Mirgorod for your answer. In fact, my problem how i correlate between the optical properties of metallic films and the SERS activity. I have prepared Au films using Sputtering method and i used this film for SERS detection of Rh B using 532 nm laser, the film that showed the best SERS, hasn't the maximum Uv absorption intensity at 532 nm. The film that prepared at long sputtering time has the maximum absorbance at 532 nm, at the same time has bad SERS activity
Your glassy film for SERS. It is necessary to make the film rough. You can chemical methods.
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