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. 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 2013, 117, 4824-4835

2. 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.

3. 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.

4. 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.

5. 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.

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