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. Thanthirige, V.D.; Kim, M.; Choi, W.; Kwak, K.; Lee, D.; Ramakrishna, G. Temperature-Dependent Absorption and Ultrafast Exciton Relaxation Dynamics in MAu24(SR)18 Clusters (M = Pt, Hg): Role of the Central Metal Atom J. Phys. Chem. C 2016, 120, 23180-23188.

2. Pyo, K.; Thanthirige, V. D.; Yoon, S. K.; Ramakrishna, G.; Lee, D. Enhanced luminescence of Au22(SG)18 nanoclusters via rational surface engineering Nanoscale 2016, Article in press. DOI: 10.1039/C6NR07660B.

3. Pyo, Kyunglim; Thanthirige, Viraj Dhanushka; Kwak, Kyuju; Pandurangan, Prabhu; Ramakrishna, G; Lee, Dongil Ultrabright Luminescence from Gold Nanoclusters: Rigidifying the Au(I)-Thiolate Shell J. Am. Chem. Soc. 2015, 137, 8244-8250.

4. Weissker, H.-Ch.; Escobar, H.B; Thanthirige, V.D.; Kwak, K.; Lee, D.; Ramakrishna, G.; Whetten, R. L.; Lopez-Lozani, X. Information on quantum states pervades the visible spectrum of the ubiquitous Au144(SR)60 gold nanoclusters Nature Communications 2014, 5, 3785.

5. Hamam, K. J.; Al-Amar, M.M.; Mezei, G.; Guda, Ramakrishna, Burns, C. High dielectric constant response of modified copper phthalocyanine J. Mol. Liq. 2014, 199, 324-329.

6. Devadas, M. S.; Thanthirige, V. D.; Bairu, S.; Sinn, E.; Ramakrishna, G Temperature-dependent absorption and ultrafast luminescence dynamics of biicosahedral Au25 clusters J. Phys. Chem. C 2013, 117, 23155-23161.

7. Bairu, S.; Ramakrishna, G Two-photon absorption properties of chromophores in micelles: electrostatic interactions J. Phys. Chem. B 2013, 117, 10484-10491.

8. 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 Ultrafast Interfacial Charge-Transfer Dynamics in a Donor-π-Acceptor Chromophore Sensitized TiO₂ Nanocomposite Journal of Physical Chemistry C 2013, 117, 4824-4835

Click here for complete list of publications

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