Scientists have developed a new low-cost substrate that can increase the sensitivity of Surface-enhanced Raman spectroscopy (SERS). In this context, understand what is Surface-enhanced Raman spectroscopy, the Raman Effect and other important details for the IAS exam science and technology segment.
Surface-Enhanced Raman Spectroscopy (SERS)
SERS, or surface-enhanced Raman spectroscopy, is a crucial analytical and sensing device for finding compounds.
- It can help with the quick detection of harmful contaminants in food, water, and other sources.
Working of Surface-Enhanced Raman Spectroscopy (SERS):
- For the quick detection of industrial contaminants, researchers have developed an effective SERS substrate based on the distinctive molybdenum trioxide shape of sea urchins.
- Many one-dimensional (1D) spikes seen in sea urchin architecture can offer a large surface area for analyte adsorption and hotspots for amplifying Raman signals.
- The sensitive SERS substrate was made using a straightforward method called chemical bath deposition, in which sea urchins are grown directly on glass substrates using an ammonium heptamolybdate and nitric acid solution at 90 °C.
Significance of Surface-enhanced Raman spectroscopy (SERS)
- SERS, short for surface-enhanced Raman spectroscopy, has become a crucial analytical and sensing method for finding compounds.
- The Raman signals of molecules will significantly increase when they are close to noble metal nanoparticles, such as gold, silver, platinum, etc. This can aid in the detection of minute amounts of analyte molecules.
- Semiconductor oxides have shown promise in this area as materials for the creation of SERS substrates.
What is the Raman Effect?
- Raman scattering, often known as the Raman effect, is the inelastic scattering of photons from an atom or molecule.
- The renowned Indian physicist C. V. Raman first identified this effect in 1928.
- The majority of photons, which have the same energy and wavelength as the incident photons, are often elastically dispersed from an atom or a molecule.
- This phenomenon, known as “Rayleigh scattering,” is what gives the sky its blue hue.
Surface-Enhanced Raman Spectroscopy (SERS) [UPSC Notes]:- Download PDF Here
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