Roberts, Sean T. - The University of Texas at Austin

个人简介

NSF ACC-F Postdoctoral Fellow, 2010-2011 ACS Physical Chemistry Division Postdoctoral Research Award, 2011 Burg Postdoctoral Teaching Fellowship, 2012 Natural Science Foundation Advisory Council Teaching Award, 2014

研究领域

The Roberts group develops new nonlinear optical techniques to investigate energy and charge transfer in molecular materials. Projects currently underway in the group include the development of techniques that can look at dynamics at buried interfaces in thin film electronics and building time-resolved Raman spectroscopies to look at ligand-nanocrystal interactions and singlet fission in molecular films.

近期论文

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Roberts, A. Mandal, & A. Tokmakoff, “Local and collective reaction coordinates in the transport of the aqueous hydroxide ion” J. Phys. Chem. B. 118(28), 8062-69, (2014). S. Das, P. P. Khlyabich, B. Burkhart, S. T. Roberts, E. Couderc, B. C. Thompson, & S. E. Bradforth, “Quantifying charge recombination in solar cells based on donor-acceptor P3HT analogs” J. Phys. Chem. C. 118, 6650-60, (2014). R. Sarkissian, S. T. Roberts, T.-W. Yeh, S. Das, S. E. Bradforth, J. O’Brien, & P. D. Dapkus, “Photon quenching in InGaN quantum well light emitting devices” Appl. Phys. Lett. 103, 041123, (2013). J. N. Mastron, S. T. Roberts, R. E. McAnally, M. E. Thompson, & S. E. Bradforth, “Aqueous colloidal acene nanoparticles: A new platform for studying singlet fission” J. Phys. Chem. B. 117(49), 15519-26, (2013). P. Dhar, P. P. Khlyabich, B. Burkhart, S. T. Roberts, S. S. Malyk, B. C. Thompson, & A. V. Benderskii, “Annealing induced changes in the molecular orientation of poly-3-hexylthiophene at buried interfaces” J. Phys. Chem. C. 117(29), 15213-20, (2013). Q. Zhong, V. V. Diev, S. T. Roberts, S. E. Bradforth, & M. E. Thompson, “Fused porphyrin-single walled carbon nanotube hybrids: Efficient formation and photophysical characterization” ACS Nano. 7(4), 3466-75, (2013). S. T. Roberts, R. E. McAnally, J. N. Mastron, D. H. Webber, M. T. Whited, R. L. Brutchey, M. E. Thompson, & S. E. Bradforth, “Efficient singlet fission discovered in a disordered acene film” J. Am. Chem. Soc. 134(14), 6388-400, (2012). M. T. Whited, N. M. Patel, S. T. Roberts, P. I. Djurovich, S. E. Bradforth, & M. E. Thompson, “Symmetry-breaking intramolecular charge transfer in the excited state of meso-linked BODIPY dyads” Chem. Commun. 48, 284-86, (2012). S. T. Roberts, C. W. Schlenker, V. Barlier, R. E. McAnally, Y. Zhang, J. N. Mastron, M. E. Thompson, and S. E. Bradforth, “Observation of triplet exciton formation in a platinum sensitized organic photovoltaic device” J. Phys. Chem. Lett. 2(2), 49-54, (2011). K. Ramasesha, S. T. Roberts, R. A. Nicodemus, A. Mandal, & A. Tokmakoff, ”Ultrafast 2D IR anisotropy of water reveals reorientation during hydrogen-bond switching" J. Chem. Phys. 135, 054509, (2011). S. T. Roberts, K. Ramasesha, P. B. Petersen, A. Mandal, and A. Tokmakoff, “Proton transfer in concentrated aqueous hydroxide visualized using ultrafast infrared spectroscopy” J. Phys. Chem. A. 115(16), 3957-72, (2011). M. T. Whited, P. I. Djurovich, S. T. Roberts, A. C. Durrell, C. W. Schlenker, S. E. Bradforth, and M. E. Thompson, “Singlet and triplet excitation management in a bichromophoric near-infrared-phosphorescent BODIPY-benzoporphyrin platinum complex” J. Am. Chem. Soc. 133(1), 88-96 (2010). S. T. Roberts, J. J. Loparo, K. Ramasesha, and A. Tokmakoff, “A fast-scanning Fourier transform 2D IR interferometer” Opt. Commun. 284, 1062-66, (2010). R. A. Nicodemus, K. Ramasesha, S. T. Roberts, and A. Tokmakoff, “Hydrogen bond rearrangements in water probed with temperature-dependent 2D IR” J. Phys. Chem. Lett. 1(7), 1068-72, (2010). S. T. Roberts, P. B. Petersen, K. Ramasesha, A. Tokmakoff, I. S. Ufimtsev, and T. J. Martinez, “Observation of a Zundel-like transition state during proton transfer in aqueous hydroxide” Proc. Natl. Acc. Sci. U.S.A. 106(36), 15154-59, (2009). S. T. Roberts, K. Ramasesha, and A. Tokmakoff, “Structural rearrangements in water viewed through two-dimensional infrared spectroscopy” Acc. Chem. Resh. 42(9), 1239-49, (2009). P. B. Petersen, S. T. Roberts, K. Ramasesha, D. G. Nocera, and A. Tokmakoff, “Ultrafast N-H vibrational dynamics of cyclic doubly hydrogen-bonded homo- and heterodimers” J. Phys. Chem. B. 112, 13167-71, (2008). J. J. Loparo, S. T. Roberts, R. A. Nicodemus, and A. Tokmakoff, “Variation of the transition dipole moment across the OH stretching band of water” Chem. Phys. 341(1-3), 218-29 (2007). J. R. Schmidt, S. T. Roberts, J. J. Loparo, A. Tokmakoff, M. D. Fayer, and J. L. Skinner, “Are water simulation models consistent with steady-state and ultrafast vibrational spectroscopy experiments?” Chem. Phys. 341(1-3), 143-57, (2007). A. D. Smith, C. K.-F. Shen, S. T. Roberts, R. Helgeson, and B. J. Schwartz, “Ionic strength and solvent control over the physical structure, electronic properties and superquenching of conjugated polyelectrolytes” Res. Chem. Intermed. 33(1-2), 125-42, (2007).