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STUDENT SEMINAR 

 

Speaker:           Sanjoy Patra 

Topic:              Surface Enhanced Raman Spectroscopy 

Date & Time:    Thursday, 26 August 2021 at 4:00 PM through MICROSOFT TEAMS 

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Abstract: 

Surface Enhanced Raman Scattering or “SERS” is a variant of Raman scattering that increase the sensitivity of the Raman signal by several orders of magnitude. Mostly for fluorophores, highly intense fluorescence sometimes obscure the less intense Raman signal rendering Raman spectroscopy not useful in several scenarios. Unlike Raman scattering , SERS needs a metallic nanostructured surface on which the adsorbed Raman active molecules lead to an enhanced Raman scattering signal suitable for detection down to single molecule level.

In my seminar, I will first introduce the basic concepts of Raman Scattering and the development of SERS. I will briefly talk about the theories behind SERS enhancement mechanism. I will conclude with the discussion of how SERS mechanism was recently exploited for real-time detection of the vibrational quantum beats from a single molecule.

References:

 

  • Paul L. Stiles, Jon A. Dieringer, Nilam C. Shah, and Richard P. Van Duyne  “Surface-Enhanced Raman Spectroscopy” , Annu. Rev. Anal. Chem. 2008. 1:601-26, DOI: 10.1146/annurev.anchem.1.031207.112814
  • John R. Lombardi and Ronald L. Birke  “A Unified View of Surface-Enhanced Raman  Scattering” , Acc. of Chem. Res. 2008, 734-742, DOI: 10.1021/ar800249y
    Luis M. Liz-Marzán et al.  “Present and Future of Surface-Enhanced Raman Scattering” , ACS  Nano 2020, 14, 28−117, DOI: 10.1021/acsnano.9b04224
  • Ana Isabel Perez-Jimenez, Danya Lyu, Zhixuan Lu,  Guokun Liu and Bin Ren “Surface-enhanced Raman spectroscopy: benefits, trade-offs and future developments” , Chem. Sci.,
    2020, 11, 4563, DOI: 10.1039/d0sc00809e
  • Shuming Nie and Steven R. Emory, “Probing Single Molecules and Single Nanoparticles by Surface-Enhanced Raman Scattering”, SCIENCE, vol. 275, 5303, 1102-1106, DOI:
    10.1126/science.275.5303.1102
  • Steven YampolskyDmitry A. FishmanShirshendu DeyEero HulkkoMayukh Banik,Eric O. Potma and Vartkess A. Apkarian “Seeing a single molecule vibrate through time-resolved coherent anti-Stokes Raman scattering”, Nature Photonics 2014  8, 650–656, DOI:  10.1038/nphoton.2014.143