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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.      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 2013117, 4824-4835

Click here for complete list of publications