image001.jpg

 

pic1.jpg

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

Home   Research   Publications  Group   Courses   Outreach  Contact

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