个人简介

Research Corporation Cottrell Scholar 2006 Presidential Early Career Award for Scientists and Engineers (PECASE), AFOSR Sponsored, 2005 National Science Foundation CAREER Award 2005 National Institutes of Health Postdoctoral Fellowship, 2001-2003 DuPont Fellowship, Northwestern University Institute for Nanotechnology 2001-2003 British Marshall Scholarship, 1997-2000 Materials Research Society Graduate Student Gold Award National Science Foundation Graduate Research Fellowship, 1999-2001 American Chemical Society Charles D. Coryell Award, 1997 (Division of Nuclear Chemistry) American Physical Society Apker Award Finalist, 1997 Phi Beta Kappa, Sigma Pi Sigma Arthur R. Metz Scholar, 1993-1997, Indiana University

研究领域

Physical and Materials Chemistry/Nanotechnology

The principles and tools of physical and materials chemistry are critical to the energy generation and storage problem. Research in the Ginger lab focuses on the physical chemistry of nanostructured materials with potential applications in low cost photovoltaics (solar cells), energy efficient light-emitting diodes, and novel biosensors. In particular, we study conjugated polymers, semiconductor nanocrystal quantum dots, and plasmon resonant metal nanoparticles. We develop and apply new combinations of scanning probe microscopy and optical spectroscopy (including single molecule techniques) to understand the basic science behind these materials and their applications in devices. We assemble these materials into new structures using Dip-Pen Nanolithography and bio-inspired materials approaches. In general we are interested in the interplay between the organizational structure, the electrical properties, and the optical properties of nanoscale materials, especially as applied to problems of solar energy. 1) Nanoscale Morphology in Conjugated Polymer Blends Conjugated polymers blends are promising materials for the next-generation of low-cost photovoltaic materials. To better understand these materials, we combine optical spectroscopy and scanning- probe methods to study charge separation, recombination and transport as a function of thin film morphology and interfacial chemistry in thin films of organic semiconductors. Dip-Pen Nanolithography is used to generate templates for controlling nanoscale morphology through surface chemistry. We have developed Time-resolved Electrostatic Force Microscopy (EFM) and conducting-probe AFM techniques to characterize charge generation, transport, and recombination, with spatial resolutions better than 50 nm, and time resolutions that are the fastest in the world using these methods. 2) Optoelectronic Properties of Colloidal Quantum Dots In addition to conjugated-polymers, we are also interested in semiconductor quantum dots as optoelectronic chromophores, particularly for harvesting of low energy photons for solar energy applications. Our research simultaneously combines both optical spectroscopy to study charge generation and recombination in thin films, with scanning probe methods to explore how local variations in environment can influence these processes. We also investigate the effects of surface chemistry on the optical and electronic properties of the particles that we synthesize, and also study composites of quantum dots with organics that are made possible with novel organic semiconductors synthesized by our collaborators. 3) Near-Field Nanophotonics The local electromagnetic field enhancements that occur near metal nanoparticles can be used to tailor the optical properties of nearby chromophores. We use biomaterials and self-assembly methods to create supramolecular clusters of chromophores and metal particles with unique optical properties. These “metachromophores” exhibit optical properties distinct from those that can be obtained with conventional single-component materials and have unique applications ranging from photovoltaics to label free biosensors. We study the assembled structures by using standard absorption and fluorescence techniques, in addition to single molecule fluorescence, single molecule darkfield scattering, and single molecule lifetime measurements.

近期论文

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"Efficient CdSe/CdS Quantum Dot Light-Emitting Diodes Using a Thermally Polymerized Hole Transport Layer," J. Zhao, J. A. Bardecker, A. M. Munro, M. S. liu, Y. Niu, I.-K. Ding, J. Luo, B. Chen, A. K.-Y. Jen, D. S. Ginger, Nano Letters [Online] (2006) DOI: 10.1021/nl052417e. "Nanoarrays," D. V. Nicolau, L. M. Demers, D. S. Ginger, in Microarray Technology and Its Applications U. R. Muller, D. V. Nicolau, Eds. (Springer, Berlin, 2005) pp. 89-118. "Patterning Phase Separation in Polymer Films with Dip-Pen Nanolithography," D. C. Coffey, D. S. Ginger, J. Am. Chem. Soc. (2005) 127, 4564. "Top-Down Meets Bottom-Up: Dip-Pen Nanolithography and DNA-Directed Assembly of Nanoscale Electrical Circuits," S. W. Chung, D. S. Ginger, M. Morales, Z. Zhang, V. Chandrasekhar, M. A. Ratner, C. A. Mirkin, Small (2005) 1, 64. "The evolution of dip-pen nanolithography," D. S. Ginger, H. Zhang, C. A. Mirkin, Angewandte Chemie-International Edition (2004) 43, 30. "Direct-write dip-pen nanolithography of proteins on modified silicon oxide surfaces," J. H. Lim, D. S. Ginger, K. B. Lee, J. Heo, J. M. Nam, C. A. Mirkin, Angewandte Chemie-International Edition (2003) 42, 2309. "Living templates for the hierarchical assembly of gold nanoparticles," Z. Li, S. W. Chung, J. M. Nam, D. S. Ginger, C. A. Mirkin, Angewandte Chemie-International Edition (2003) 42, 2306. "Next-Generation Biosensing with Gold Nanoparticles," D. S. Ginger, Y. C. Cao, C. A. Mirkin, Biophotonics International (July, 2003) 10, 48. "Electrical properties of semiconductor nanocrystals," D. S. Ginger, N. C. Greenham, in Semiconductor and Metal Nanocrystals V. I. Klimov, Ed. (Marcel Dekker, New York, 2003). "Electrical and optical properties of semiconductor nanocrystals," C. E. Finlayson, D. S. Ginger, E. Marx, N. C. Greenham, Philosophical Transactions of the Royal Society of London Series a-Mathematical Physical and Engineering Sciences (Feb 15, 2003) 361, 363. "Adsorption behavior and current-voltage characteristics of CdSe nanocrystals on hydrogen-passivated silicon," K. Walzer, U. J. Quaade, D. S. Ginger, N. C. Greenham, K. Stokbro, Journal of Applied Physics (Aug 1, 2002) 92, 1434. "Self-assembled monolayers of CdSe nanocrystals on doped GaAs substrates," E. Marx, D. S. Ginger, K. Walzer, K. Stokbro, N. C. Greenham, Nano Letters (Aug, 2002) 2, 911. "Amplified spontaneous emission in close-packed films of semiconductor nanocrystals using picosecond excitation," C. E. Finlayson, D. M. Russell, C. M. Ramsdale, D. S. Ginger, C. Silva, N. C. Greenham, Advanced Functional Materials (Aug, 2002) 12, 537. "Triplet formation and decay in conjugated polymer devices," A. S. Dhoot, D. S. Ginger, D. Beljonne, Z. Shuai, N. C. Greenham, Chemical Physics Letters (Jul 10, 2002) 360, 195. "Direct patterning of modified oligonucleotides on metals and insulators by dip-pen nanolithography," L. M. Demers, D. S. Ginger, S. J. Park, Z. Li, S. W. Chung, C. A. Mirkin, Science (Jun 7, 2002) 296, 1836. "A silicon structure for electrical characterisation of nanoscale elements," P. J. A. Sazio, J. Berg, P. See, C. J. B. Ford, P. Lundgren, N. C. Greenham, D. S. Ginger, S. Bengtsson, S. N. Chin, Mat. Res. Soc. Symp. Proc. (2001) 679, B2.3.1. "Charge transport in semiconductor nanocrystals," D. S. Ginger, N. C. Greenham, Synthetic Metals (Oct 3, 2001) 124, 117. "Enhanced Forster energy transfer in organic/inorganic bilayer optical microcavities," C. E. Finlayson, D. S. Ginger, N. C. Greenham, Chemical Physics Letters (Apr 20, 2001) 338, 83. "Thermal excitation-energy deposition in 5-15 GeV/c hadron- induced reactions with Au-197. II. Relation between excitation energy and reaction variables," L. Beaulieu, T. Lefort, K. Kwiatkowski, W. C. Hsi, G. Wang, D. S. Bracken, E. Cornell, D. S. Ginger, K. B. Morley, W. E. Viola, F. Gimeno-Nogues, R. Laforest, E. Martin, E. Ramakrishnan, D. Rowland, A. Ruangma, E. Winchester, S. J. Yennello, R. G. Korteling, L. Pienkowski, H. Breuer, B. Back, S. Gushue, L. R. Remsberg, M. J. Huang, W. G. Lynch, M. B. Tsang, H. Xi, Physical Review C (Dec, 2001) 6406, art. no.. "Electrical injection and transport in films of semiconductor nanocrystals," D. S. Ginger, N. C. Greenham, Mat. Res. Soc. Symp. Proc. (2000) 571, 185.