Research Interests


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Research Interests

My research interests include Surface Enhanced Infrared Absorption Spectroscopy (SEIRA)
and Surface Enhanced Raman spectroscopy (SERS) of molecules coated on Nanoshells.

Nanoshells are hetero nanostructures consisting of a dielectric core and a thin metal shell.
Fabrication of Nanoshells using Silica as core and Gold (Au) as metallic shell has largely
been developed from the field of chemistry. The core-shell structure provides high tunability
of the localized Plasmon resonances of these heterostructures.The Nanoshell Plasmon
resonances are tunable from Visible to Mid IR. These discrete plasmon resonances largely
contribute to the surface enhancement by concentrating the incident electromagnetic radiation
thereby increasing the 'throughput' on the molecules close to nanoshell surface. Nanoshells have
been succesfully used as a SERS substrate and my current work involves developing nanoshells
as substrates for SEIRA.

Studying the fundamental plasmon resonant properties of IR nanoshells constitute an integral
part of research which necessitates electromagnetic theory and nanofabrication chemistry.
  

Publications

Janardan Kundu, Fei Le, Peter Nordlander, and Naomi J. Halas. Surface enhanced infrared absorption (SEIRA) spectroscopy on nanoshell aggregate substrates, Chemical Physics Letters 452(1-3), 115-119 (2008).

Surbhi Lal, Nathaniel K. Grady, Janardan Kundu, Carly S. Levin, J. Britt Lassiter, and Naomi J. Halas. Tailoring plasmonic substrates for surface enhanced spectroscopies, Chemical Society Review 37, 898-911 (2008).

Hui Wang, Janardan Kundu, and Naomi J. Halas. Plasmonic Nanoshell Arrays Combine Surface-Enhanced Vibrational Spectroscopies on a Single Substrate, Angewandte Chemie Int. Ed. 46(47), 9040-9044 (2007).

Felicia Tam, Allen L. Chen, Janardan Kundu, Hui Wang, and Naomi J. Halas. Mesoscopic nanoshells: Geometry-dependent plasmon resonances beyond the quasistatic limit, J. Chem. Phys 127, 204703 (2007).

F. Le, D. W. Brandl, Y. A. Urzhumov, H. Wang, J. Kundu, N. J. Halas, J. Aizpurua, and P. Nordlander. Metallic Nanoparticle Arrays: A Common Substrate for Both Surface-Enhanced Raman Scattering and Surface-Enhanced Infrared Absorption, ACS Nano 2(4), 707-718 (2008).


Conferences Attended

ACS Spring Meeting 2007, Boston.
Poster: Surface Enhanced Raman and Infrared Spectroscopy (SERS and SEIRA) of Ibuprofen Intercalated Hybrid Bilayer Nanoshells.

APS March Meeting 2008, New Orleans.
Oral Presentation: Surface Enhanced Infrared Absorption (SEIRA) Spectroscopy Using Au-Nanoshell Substrates.


Dark Field Microscopy of Nanoshells