Recently, scientists at the Institute of Nano Science and Technology (INST), Mohali have uncovered an approach to manufacture precisely controlled nanostructures of the desired geometry and location on 2D materials. To achieve this, they used a swift one-step process involving low power laser writing. The autonomous institute operates under the Department of Science and Technology (DST).
Inst Develops Hybrid SERS Platform
The key highlight of the research is the development of a hybrid Surface-Enhanced Raman Spectroscopy (SERS) platform. The platform consists of Molybdenum disulfide (MoS2, an inorganic compound) nanostructure decorated with gold NanoParticles (AuNPs).
SERS is a frequently used sensing technique in which inelastic light scattering by molecules is greatly intensified when the molecules are absorbed onto uneven metal surfaces like silver or gold nanoparticles (NPs). This technique enhances the Raman scattering light from molecules, therefore making the analysis of the molecules more efficient.
Laser Writing for Precise Edges
The scientists used direct laser writing, which is similar to 3D printing for the microscopic world, to engineer artificial edges on the surface of MoS2. These artificially created edges induced localized hotspots with precision and control. A focused laser beam of nominal power from a conventional Raman spectrometer was used, enabling the superior deposition of AuNPs along the artificial edges. The nanostructuring took place on the 2D MoS2 sheet.
Hybrid SERS Platform Benefits
The hybrid SERS platform provides controlled formation of localized hotspots for ultra-sensitive and repeatable detection of analytes. Analytes are substances that are being identified and measured chemically.
Significance Of This Research
This research brings promising prospects for the growth of commercialized SERS substrates. A silicon wafer coated with a metal such as gold or silver typically forms these. The unique localized detection capability of analytes is a prominent feature of these substrates.
SERS detection is becoming a powerful tool for identifying a wide range of analytes, thanks to its high sensitivity and distinct recognition capabilities. This research will also help understand the SERS sensing of biological and chemical molecules better.
Applications of the Technology
The technology can be used in conjunction with an antibody for the spectroscopic detection of various biomarkers. Biomarkers are measurements that capture what’s happening in a cell or organism at a particular moment.
The Raman Effect
The Raman Effect is an essential phenomenon discovered by the eminent physicist Sir Chandrasekhara Venkata Raman on 28th February 1928. India celebrates National Science Day on this date in his honour. The Raman Effect laid the foundation for Raman spectroscopy. This is a method used by chemists and physicists to learn more about materials as it allows for studying the interaction between matter and electromagnetic radiation.
Last Modified: February 7, 2024