Gold, Silver SERS Substrates Boast Range of Applications

Ocean Optics
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Ocean Optics’ new RAM-SERS-SP Surface Enhanced Raman Spectroscopy Substrates (SERS) use a proprietary gold-silver nanosponge alloy to produce highly sensitive, trace-level Raman spectroscopy measurements.

The applications for SERS range from detection of explosives and narcotics, to food safety, anti-counterfeit tagging and biological research. Fast, repeatable measurements of SERS-active analytes are possible even to parts per trillion levels. Silver-only SERS substrates work best with 532 nm Raman excitation, and gold substrates are better suited to 785 nm Raman systems. By combining the silver and gold on one substrate, the new SERS nanosponge substrates perform well with either wavelength. Also, when used with 638 nm Raman excitation, the nanosponge substrates are enhanced to an even higher level of sensitivity. RAM-SERS-SP nanosponge substrates are more robust than other options and handle the deposition of sensitive samples more effectively. The higher sensitivity of these substrates opens up new opportunities for SERS applications, particularly in addressing the growing need for fast, effective detection of explosives and pesticides. The substrates work with the complete range of proprietary Raman instruments. For users to take full advantage of the nanosponge substrates’ sensitivity, the company now offers 638 nm modular Raman solutions and 638 nm versions of its mini handheld IDRaman spectrometers. Proprietary plasma deposition permits affordable mass production with high repeatability and customization options. Standard substrates are microscope slide format with a 4 x 4 mm active area. Ocean

Gold, Silver SERS Substrates Boast Range of Applications