Welcome to Samanta's Research Group




Faculty Profile Image

  Anunay  Samanta

FASc, FNASc, FNA

  Professor and J.C. Bose National Fellow
  School of Chemistry, University of Hyderabad-500 046, India
  Phone: +91-40-2313 4813, 2301 1594  (office)
     +91-40-2313 4913  (lab)
     +91-40-2301 0715 (home)
  Email: anunay@uohyd.ac.in
     anunay.samanta@gmail.com






Research Overview


We are interested in spectroscopy and dynamics of short-lived (transient) species formed on photo-excitation of molecular systems and materials. We employ time-resolved fluorescence and ultrafast pump-probe (transient absorption spectroscopy) techniques for this purpose. We also use time-resolved confocal fluorescence microscopy technique like fluorescence lifetime imaging and single-molecule fluorescence technique such as fluorescence correlation spectroscopy for our studies. We are currently engaged in the study of charge carrier dynamics and fluorescence blinking in a variety of photo-excited perovskite nanocrystals of different morphologies, photo-induced processes in semiconductor quantum dots, solute and solvation dynamics and understanding the nature of the ionic liquids and deep eutectic solvents.





Some Recent Publications


  • Complete Ultrafast Charge Carrier Dynamics in Photoexcited All-Inorganic Perovskite Nanocrystals (CsPbX3), N. Mondal and A. Samanta, Nanoscale 9 (2017) 1878.
  • Roles of the Methyl and Methylene Groups of Mercapto Acids in the Photoluminescence Efficiency and Carrier Trapping Dynamics of CdTe QDs, M. C. Sekhar, A. De, S. S. Hossain and A. Samanta, Phys. Chem. Chem. Phys. 19 (2017) 1536.
  • A Facile Methodology for Engineering the Morphology of CsPbX3 Perovskite Nanocrystals under Ambient Condition, S. Seth and A. Samanta, Sci. Rep. 6 (2016) 37693.
  • Photoinduced 2-way Electron Transfer in Composites of Metal Nanoclusters and Semiconductor Quantum Dots, N. Mondal, S. Paul and A. Samanta, Nanoscale 8 (2016) 14250.
  • Fluorescence Blinking and Photoactivation of All-Inorganic Perovskite Nanocrystals CsPbBr3 and CsPbBr2I, S. Seth, N. Mondal, S. Patra, and A. Samanta, J. Phys. Chem. Lett. 7 (2016) 266.
  • Ultrafast Charge Transfer and Trapping Dynamics in a Colloidal Mixture of Similarly Charged CdTe Quantum Dots and Silver Nanoparticles, N. Mondal and A. Samanta, J. Phys. Chem. C 120 (2016) 650.
  • Hexaethylsubporphyrins: β-alkyl Analogues in the Subporphyrin Family, B. Chandra, B. S. Kumar, N. Mondal, A. Samanta and P. K. Panda, Dalton Trans. 44 (2015) 19966.
  • Effect of Controlled Deposition of ZnS Shell on the Photostability of CdTe Quantum Dots as Studied by Conventional Fluorescence and FCS Techniques, S. Patra, S. Seth and A. Samanta ChemPhysChem 16 (2015) 3871.
  • Spectroscopic and Molecular Docking Study of the Interaction of DNA with a Morpholinium Ionic Liquid, A. Pabbathi and A. Samanta, J. Phys. Chem. B 119 (2015) 11099.
  • Fluorescence Studies of the Microenvironments of the Morpholinium Room Temperature Ionic Liquids, D.C. Khara, K. Santhosh and A. Samanta in B.K. Paul and S. P. Moulik, Ed. In “Ionic Liquid-Based Surfactant Science: Formulation, Characterization and Applications," John Wiley & Sons, NJ, USA (2015) 151.
  • Temporal Behavior of the Singlet Molecular Oxygen Emission in Imidazolium and Morpholinium Ionic Liquids and Its Implications, T. Yoshida, A. Kawai, D. C. Khara, and A. Samanta, J. Phys. Chem. B 119 (2015) 6696.
  • Ultrafast Transient Absorption Study of the Nature of Interaction between Oppositely Charged Photoexcited CdTe Quantum Dots and Cresyl Violet, M.C. Sekhar and A. Samanta, J. Phys. Chem. C 119 (2015) 15661.
  • Contrasting Response of Two Dipolar Fluorescence Probes in a Leucine-Based Organogel and Its Implications, S. Soumya, S. Seth, S. Paul, and A. Samanta, ChemPhysChem 16 (2015) 2440.
  • Temporal Behavior of the Singlet Molecular Oxygen Emission in Imidazolium and Morpholinium Ionic Liquids and Its Implications, T. Yoshida, A. Kawai, D. C. Khara, and A. Samanta, J. Phys. Chem. B 119 (2015) 6696.
  • CdTe Quantum Dots in Ionic Liquid: Stability and Hole Scavenging in Presence of a Sulfide salt, M.C. Sekhar, K. Santhosh, J. Praveen Kumar, N. Mondal, S. Soumya and A. Samanta, J. Phys. Chem. C 118 (2014) 18481.
  • Effect of Capping Agent and Medium on Light-Induced Variation of the Luminescence Properties of CdTe Quantum Dots: A Study Based on Fluorescence Correlation Spectroscopy, Steady State and Time-Resolved Fluorescence Techniques, S. Patra and A. Samanta, J. Phys. Chem. C 118 (2014) 18187.
  • Does Excited state proton transfer reaction contribute to the emission behaviour of 4-Aminophthalimide in Aqueous media? D. C. Khara, S. Banerjee and A. Samanta, ChemPhysChem 15 (2014) 1793.
  • An FCS study of the structural stability of lysozyme in the presence of morpholinium salts, A. Pabbathi, S. Ghosh and A. Samanta, J. Phys. Chem. B 117 (2013) 16587.
  • A Fluorescence Correlation Spectroscopy, Steady State and Time-Resolved Fluorescence study of modulation of photo physical properties of mercaptopropionic acid capped CdTe quantum dots upon exposure to light, S. Patra and A. Samanta, J. Phys. Chem. C 117 (2013) 23313.
  • Comment on An interesting case where water behaves as a unique solvent. 4-Aminophthalimide emission profile to monitor aqueous environment, D. C. Khara and A. Samanta, J. Phys. Chem. B 117 (2013) 5387 (comment).
  • Structural transformation of bovine serum albumin induced by dimethyl sulfoxide and probed by fluorescence correlation spectroscopy technique and additional methods, A. Pabbathi, S. Patra and A. Samanta, ChemPhysChem 14(11) (2013) 2441.
  • Effect of the alkyl chain length on the rotational dynamics of nonpolar and dipolar solutes in a series of N-alkyl-N-methylmorpholinium ionic liquids, D. C. Khara, J. Praveen Kumar, N. Mondal and A. Samanta,  J. Phys. Chem. B 117 (2013) 5156.
  • Fluorescence response of coumarin-153 in N-alkyl-N-methylmorpholinium ionic liquids: Are these liquids more structured than the imidazolium ionic liquids? D. C. Khara and A. Samanta, J. Phys. Chem. B 116 (2012) 13430.
  • Microheterogeneity of some imidazolium ionic liquids as revealed by fluorescence correlation spectroscopy and lifetime studies, S. Patra and A. Samanta, J. Phys. Chem. B 116 (2012) 12275.
  • Exploring the CdTe Quantum Dots in Ionic Liquids by Employing a Luminescent Hybrid of the Two, K. Santhosh and A. Samanta, J. Phys. Chem. C 116 (2012) 20643.
  • Differential Effect of Cholesterol and Its Biosynthetic Precursors on Membrane Dipole Potential, S. Haldar, R. K. Kanaparthi, A. Samanta and A. Chattopadhyay, Biophysical Journal 102 (2012) 1561.
  • What determines the rate of excited state intramolecular electron transfer reaction of 4-(N,N'-dimethylamino)benzonitrile in room temperature ionic liquids? A study in [bmim][PF6], K. Santhosh ans A. Samanta, ChemPhysChem 13 (2012) 1956.
  • Fluorescence quenching of CdS quantum dots by 4-azetidinyl-7-nitrobenz-2-oxa-1,3-diazole: A mechanistic study, K. Santhosh, S. Patra, S. Soumya, D. C. Khara and A. Samanta, ChemPhysChem 12 (2011) 2735.
  • Dual fluorescence of ellipticine: Excited state proton transfer from solvent versus solvent mediated intramolecular proton transfer, S. Banerjee, A. Pabbathi, M. C. Sekhar and A. Samanta, J. Phys. Chem. A 115 (2011) 9217.
  • Folding and unfolding movements in a [2]pseudorotaxane, M. Suresh, A. K. Mandal, M. K. Kesharwani, N. N. Adarsh, B. Ganguly, R. K. Kanaparthi, A. Samanta and A. Das, J. Org. Chem. 76 (2011) 138.
  • "Fluorescence probing of the physicochemical characteristics of the room temperature ionic liquids" by A. Samanta, a book chapter of the "Advanced fluorescence reporters in chemistry and biology III: Applications in sensing and imaging" A. P. Demchenko (Volume Editor), Springer, 2011.
  • Solvation dynamics in ionic liquids: What we have learned from the dynamic fluorescence Stokes shift studies, A. Samanta, J. Phys. Chem. Lett. 1 (2010) 1557. (Perspective Article)