A breakthrough in science has led to the development of a low-cost substrate that enhances the sensitivity of Surface-enhanced Raman spectroscopy (SERS). This development has significant implications for the field of science and technology, which is a key segment of the IAS exam.

Surface-Enhanced Raman Spectroscopy (SERS) - UPSC Exam Notes | Testbook.com
What is Surface-Enhanced Raman Spectroscopy (SERS)?
Surface-Enhanced Raman Spectroscopy (SERS) is a powerful analytical tool used in the detection of compounds.
- This technology is particularly beneficial for swiftly identifying harmful pollutants in various sources such as water, food, and the environment.
How Does Surface-Enhanced Raman Spectroscopy (SERS) Work?
- To expedite the detection of industrial pollutants, a unique SERS substrate has been developed. This substrate utilizes the unique structure of molybdenum trioxide, which resembles the shape of sea urchins.
- The sea urchin-like structure, consisting of multiple one-dimensional (1D) spikes, provides a large surface area for the adsorption of analytes and hotspots for amplifying Raman signals.
- The sensitive SERS substrate is created using a simple chemical bath deposition method. This method involves growing sea urchins directly on glass substrates using a solution of ammonium heptamolybdate and nitric acid at 90 °C.
Why is Surface-Enhanced Raman Spectroscopy (SERS) Important?
- Surface-Enhanced Raman Spectroscopy (SERS) has become a vital analytical method in the detection of compounds.
- When molecules are near noble metal nanoparticles such as gold, silver, and platinum, their Raman signals can greatly increase. This can assist in detecting minute quantities of analyte molecules.
- Semiconductor oxides, as materials for the production of SERS substrates, have shown great potential.
What is the Raman Effect?
- The Raman effect, also known as Raman scattering, is the inelastic scattering of photons from an atom or molecule.
- This effect was first discovered in 1928 by the renowned Indian physicist C. V. Raman.
- Most photons, which have the same energy and wavelength as the incident photons, are usually elastically scattered from an atom or a molecule.
- This phenomenon, known as “Rayleigh scattering,” is responsible for the blue color of the sky.
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