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Ramakrishna Guda
Assistant Professor
Post-doc, University of Michigan, 2005-08
PhD, University of Mumbai, 2005
MSc, University of Hyderabad, 1998

3444 Wood Hall
Western Michigan University
Kalamazoo, MI 49008
Ph: 269-387-2854
Fax: 269-387-2909
rama.guda@wmich.edu

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Research Interests

 

               Optical properties of quantum sized metal and semiconductor nanoclusters

               Interfacial electron and energy transfer phenomena for the design of efficient photovoltaics and two-photon optical materials

               Chromophore functionalized semiconductor and metal nanoclusters as two-photon optical materials

               Femtosecond excited state dynamics of macromolecules of interest in light harvesting, photovoltaics and sensors

               Biophysical characterization of protein via ultrafast and nonlinear spectroscopy


Selected Recent Publications

1. Temperature-Dependent Absorption and Ultrafast Luminescence Dynamics of Bi-Icosahedral Au25 Clusters

Devadas, M. S.; Thanthirige, V. D.; Bairu, S.; Sinn, E.; Ramakrishna, G.* J. Phys. Chem. C 2013, 117, Articles ASAP (DOI: 10.1021/jp408333h).

 

2. Two-Photon Absorption Properties of Chromophores in Micelles: Electrostatic Interactions

Bairu, S.; Ramakrishna, G* J. Phys. Chem. B 2013, 117, 10484-10491.

 

3. Ultrafast Interfacial Charge-Transfer Dynamics in a Donor-π-Acceptor Chromophore Sensitized TiO2 Nanocomposite

Bairu, S. G; Mghanga, E; Hasan, J; Kola, S; Rao, V. J; Bhanuprakash, K; Giribabu, L; Wiederrecht, G. P; da Silva, R; Rego, L.G. C; Ramakrishna, G* Journal of Physical Chemistry C 2013117, 4824-4835

 

4. Temperature-Dependent Optical Absorption Properties of Monolayer-Protected Au25 and Au38 Clusters

Devadas, M. S.; Bairu, S.; Qian, H.; Sinn, E.; Jin, R.; *Ramakrishna, G. J. Phys. Chem. Lett. 2011, 2, 2752-2758.

 

5. Unique Ultrafast Visible Luminescence in Monolayer-Protected Au25 Clusters
 Devadas, M.S.; Kim, J.; Sinn, E.; Lee, D.; Goodson, T. III; *Ramakrishna, G. J. Phys. Chem. C 2010, 114, 22417-22423.

 

6. Dynamics of Interfacial Charge Transfer Emission in Small Molecule-Sensitized TiO2 nanoparticles: Is it localized or Delocalized?

Varaganti, S.; Ramakrishna, G* J. Phys. Chem C 2010, 114, 13917-13925.

   
7. Directional electron transfer in chromophore-labeled quantum-sized Au25 clusters: Au25 as an electron donor
Devadas, M. S; Kwak, K; Park, J-P; Choi, J-H; Jun, C-H; Sinn, E; Ramakrishna, G; Lee, D. J. Phys. Chem. Lett.
2010, 1, 1497-1503.

Click here for complete list of publications