 |
Joseph PerryProfessor Office: MSE G209B Phone: 404-385-6046 Fax: 404-894-7452 |
B.S., University of South Florida, 1977 ; Ph.D., California Institute of Technology, 1984
Research Interests
Physical, Polymer and Materials Chemistry; Optical Science. Our research program focuses on understanding how the chemical structures of molecules and materials relate to their electronic and optical properties. We employ a molecular approach in which fundamental structure-property relations are defined through a coordinated synthesis, theory and characterization program. In particular, we seek to develop a fundamental understanding of how to control the interactions of light and matter, and use this understanding to design and synthesize molecules and material for applications in photonics, materials processing, biology, and medicine. We collaborate with theoretical, physical, and analytical chemists, optical scientists, and biologists providing researchers a multidisciplinary training.
A major focus of our research involves nonlinear optical absorption, wherein a molecule absorbs two or more photons at once. This process is intensity dependent; for two-photon absorption (TPA) the absorption rate increases quadratically with intensity. This allows activation of photo-chemical or photo-physical processes with high spatial resolution in 3-D. Current and future research directions are as follows: 1) In collaboration with Professor Marder's group, we are investigating structure-property relationships for TPA in conjugated molecules, with the goal of learning how to design efficient two-photon absorbers. These studies involve measurements of TPA spectra on molecules with systematically varied structures with dipolar, quadrupolar or octupolar charge redistribution. Excited-state Raman spectroscopy will be used to investigate the influence of excited-state structure and delocalization on TPA. 2) We are investigating excited-state reactions of systems excited by TPA. Current work focuses on molecules that undergo excited-state charge-transfer reactions following TPA and can thereby initiate polymerization. 3) TPA driven chemistry is being investigated for the 3-D patterning of materials. Using a femtosecond laser and a high-power microscope, we have fabricated 3-D structures (1-micron resolution), that can have interesting optical properties, see figure. Opportunities exist to study 3-D photopatterning of various materials including metals, and nanoparticles of metals and oxides. This allows tailoring of the optical and electronic properties of materials. 4) Fluorescent TPA chromophores are of interest for imaging and sensing and we are investigating the effects of solvent, concentration, and electric fields on TPA and fluorescence of conjugated molecules. 5) We have observed a large enhancement of the nonlinear absorption properties of dye molecules dissolved in cyanobiphenyl nematic liquid crystals (LC). Our studies indicate that photoinduced charge transfer from the dye to the LC results in the formation of strongly absorbing radical ions with high efficiency. Current studies are aimed at understanding the role of LC order in the efficiency of charge carrier generation. Other approaches, including the use of fullerene systems, to transient photochromic materials based on charge transfer are being pursued.
Recent Publications
"Excited-State Dynamics and Dye–Dye Interactions in Chromophore-Coated Gold Nanoparticles with Varying Alkyl Spacer Lengths,” M. Malicki, S. Barlow, J. M. Hales, L. McClary, M. Rumi, S. R. Marder, and J. W. Perry, Phys. Chem. Chem. Phys. , DOI:10.1039/B926938J (2010).
"Design of Polymethine Dyes with Large Third-Order Optical Nonlinearities and Loss Figures of Merit," J. M. Hales, J. Matichak, S. Barlow, S. Ohira, K. Yesudas, J.-L. Brédas, J W. Perry and S. R. Marder, Science, 327, 1485 - 1488 (2010).
"Kinetically Controlled Photoinduced Electron Transfer Switching in Cu(I)-Responsive Fluorescent Probes,” A. Chaudhry, M. Verma, T. M. Morgan, M. M. Henary, N. Siegel, J. M. Hales, J. W. Perry, C. J. Fahrni, J. Am. Chem. Soc. , 132, 737-747 (2010).
"Using End Groups to Tune the Linear and Nonlinear Optical Properties of Bis(dioxaborine)-Terminated Polymethine Dyes,” J. D. Matichak, J. M. Hales, S. Ohira, S. Barlow, S.–H. Jang, A. K.–Y. Jen, J.-L. Brédas, J. W. Perry, S. R. Marder, Chem. Phys. Chem., 11, 130-138, (2009).
"Electron Transfer-Induced Blinking in Ag Nanodot Fluorescence,” S. A. Patel, M. Cozzuol, J. M. Hales, C. I. Richards, M. Sartin, J.-C. Hsiang, Tom Vosch, J. W. Perry, and R. M. Dickson. J. Phys. Chem. C, 113, 20264–20270 (2009).
"Conjugated Polymer-Fullerene Blend with Strong Optical Limiting in the Near-Infrared,” S.-H. Chi, J. M. Hales, M. Cozzuol, C. Ochoa, M. Fitzpatrick, and J. W. Perry, Optics Express, 17, 22062-22072 (2009).
"Metalloporphyrin Polymer with Temporally Agile, Broadband Nonlinear Absorption for Optical Limiting in the Near Infrared,” J. M. Hales, M. Cozzuol, T. E. O. Screen, H. L. Anderson, and J. W. Perry, Optics Express, 17, 18478-18488 (2009).
"High Energy-Density Nanocomposites Based on Surface-Modified BaTiO3 and a Ferroelectric Polymer,” P. Kim, N. M. Doss, J. P. Tillotson, P. J. Hotchkiss, S. R. Marder, B. Kippelen, J. Li, M.-J. Pan, J. P. Calame, and J. W. Perry, ACS Nano, 3, 2581–2592 (2009).
"Layer-By-Layer Dendritic Growth of Hyperbranched Thin Films for Surface Sol-Gel Syntheses of Conformal, Functional, Nanocrystalline Oxide Coatings on Complex, 3-D (Bio)Silica Templates,” G. Wang, Y. Fang, P. Kim, A. Hayek, M. R. Weatherspoon, J. W. Perry, K. H. Sandhage, S. R. Marder, and S. C. Jones, Adv. Funct. Mater., 19, 2768 - 2776 (2009).
"Two Beams Squeeze Feature Sizes in Optical Lithography,” J. W. Perry, Science, 324, 892-893 (2009). Invited Perspective
"A New Class of Cyanine-Like Dyes with Large Bond-Length Alternation,” S. Ohira, J. M. Hales, K. J. Thorley, H. L. Anderson, J. W. Perry, and Jean-Luc Brédas, J. Am. Chem. Soc., 131, 6099–6101 (2009).
"Solution-Processible High-Permittivity Nanocomposite Gate Insulators for Organic Field-Effect Transistors,” by P. Kim, X. -H. Zhang, B. Domercq, S. C. Jones, P. J. Hotchkiss, S. R. Marder, B. Kippelen and J. W. Perry, Appl. Phys. Lett., 93, 013302-1 – 013302-3 (2008).
"Porphyrin Dimer Carbocations With Strong Near Infrared Absorption and Third-Order Optical Nonlinearity,” K. J. Thorley, J. M. Hales, H. L. Anderson and J. W. Perry, Angew. Chem. Int. Ed., 47, 7095-7098 (2008).
"Thick, Optical-Quality Films of Substituted Polyacetylenes with Large, Ultrafast Third-Order Nonlinearities and Application to Image Correlation,” S.-H. Chi, J. M. Hales, C. Fuentes-Hernandez, S.-Y. Tseng, J.-Y. Cho, S. Odom, Q. Zhang, S. Barlow, R. R. Schrock, S. R. Marder, B. Kippelen, J. W. Perry, Adv. Mater., 20, 3199–3203 (2008).
Two-Photon Absorbers and Two-Photon-Induced Chemistry,” M. Rumi, S. Barlow, J. Wang, J. W. Perry, S. R. Marder, Adv. Polym. Sci. , 213 , 1-95 (2008).
Tetrastyrylarene Derivatives: Comparison of One- and Two-photon Spectroscopic Properties with Distyrylarenes Analogues," M. Rumi, S.J. Pond, T. Meyer-Friedrichsen, Q. Zhang, M. Bishop, Y. Zhang, S. Barlow, S.R. Marder, J.W. Perry, J. Phys. Chem. C , 112 (21), 8061-8071 (2008).
Device Physics: Update on 3D Displays,” J. W. Perry, Nature , 451 , 636-637 (2008).
"Relationship Between Structure and Solubility of Thiol-Protected Silver Nanoparticles and Assemblies,” C. A. Bauer, F. Stellacci, J. W. Perry, Topics in Catalysis, 47, 32-41 (2008). Invited Article
"Two-Photon Absorption in Cross-Shaped Chromophores with Phenylene-Vinylene Backbones," M. Rumi, S.J. Pond, Q. Zhang, M. Bishop, Y. Zhang, S. Barlow, S.R. Marder, J.W. Perry, Proc. SPIE , Vol. 6891 , 689104-1 -689104-12 (2008).
"Electrodeposition of 3D titania photonic crystals from holographically patterned microporous polymer templates”, Xu, Y., Zhu, X., Dan, Y., Moon, J. H., Chen, V. W., Johnson, A. T., Perry, J. W. and Yang, S. Chem. Mater. , 20 (5) 1816-1823 (2008).
"Design of Emission Ratiometric Metal-Ion Sensors with Enhanced Two-Photon Cross-Section and Brightness,” S. Sumalekshmy, M. M. Henary, N. Siegel, P V. Lawson, Y. Wu, K. Schmidt, J.-L. Brédas, J. W. Perry, and C. J. Fahrni, J. Am. Chem. Soc. , 129 (39), 11888 (2007).
65 nm Feature Sizes using Visible Wavelength 3-D Multiphoton Lithography,” W. Haske, V. W. Chen, J. M. Hales, W. Dong, S. Barlow, S. R. Marder, J. W. Perry, Opt. Express , 15 (6), 3426-3436 (2007).
Phosphonic Acid Modified Barium Titanate-Polymer Nanocomposites with High Permittivity and Dielectric Strength,” P. Kim, S. C. Jones, P. J. Hotchkiss, J. N. Haddock, B. Kippelen, S. R. Marder, and J. W. Perry, Adv. Mater., 19, 1001-1005 (2007).
"Materials for Multiphoton 3D Microfabrication,” S. R. Marder, J.-L. Bredas, and J. W. Perry, Mater. Res. Soc. Bull., 32, No. 7 561-565 (2007). Invited Article