Academic literature on the topic 'J-Aggregate'
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Journal articles on the topic "J-Aggregate"
MAITI, NAKUL C., SHYAMALAVA MAZUMDAR, and N. PERIASAMY. "J- and H-Aggregates of Porphyrins with Surfactants: Fluorescence, Stopped Flow and Electron Microscopy Studies." Journal of Porphyrins and Phthalocyanines 02, no. 05 (October 1998): 369–76. http://dx.doi.org/10.1002/(sici)1099-1409(199807/10)2:4/5<369::aid-jpp92>3.0.co;2-3.
Full textMa, Suqian, Yingjie Liu, Jibo Zhang, Bin Xu, and Wenjing Tian. "Polymorphism-Dependent Enhanced Emission in Molecular Aggregates: J-Aggregate versus X-Aggregate." Journal of Physical Chemistry Letters 11, no. 24 (December 7, 2020): 10504–10. http://dx.doi.org/10.1021/acs.jpclett.0c02917.
Full textHu, Shu, Yang Liao, Yang Zhang, Xiaoliang Yan, Zhenlu Zhao, Weiqiang Chen, Xin Zhang, et al. "Effect of Thermal Annealing on Conformation of MEH-PPV Chains in Polymer Matrix: Coexistence of H- and J-Aggregates." Polymers 12, no. 8 (August 7, 2020): 1771. http://dx.doi.org/10.3390/polym12081771.
Full textBelko, Nikita V., Michael P. Samtsov, and Anatoly P. Lugovski. "Controlling H*- and J-aggregation of an indotricarbocyanine dye in aqueous solutions of inorganic salts." Journal of the Belarusian State University. Physics, no. 2 (June 2, 2020): 19–27. http://dx.doi.org/10.33581/2520-2243-2020-2-19-27.
Full textAnantharaman, Surendra B., Daniel Messmer, Amin Sadeghpour, Stefan Salentinig, Frank Nüesch, and Jakob Heier. "Excitonic channels from bio-inspired templated supramolecular assembly of J-aggregate nanowires." Nanoscale 11, no. 14 (2019): 6929–38. http://dx.doi.org/10.1039/c8nr10357g.
Full textKato, Noritaka, Keiji Yamamoto, and Yoshiaki Uesu. "Aqueous Dispersions of J-Aggregates and J-Aggregate-Doped Silica Bulk Gels." Japanese Journal of Applied Physics 46, no. 8A (August 6, 2007): 5318–20. http://dx.doi.org/10.1143/jjap.46.5318.
Full textMelnik, A. D., T. S. Zhebit, A. B. Krylov, S. G. Pukhovskaya, Yu B. Ivanova, and M. M. Kruk. "FORMATION OF J-AGGREGATES OF THE 21-THIA-5,10,15,20-TETRA-(4-SULFONATOPHENYL)-PORPHYRIN IN WATER SOLUTIONS." Journal of Applied Spectroscopy 89, no. 2 (March 18, 2022): 177–83. http://dx.doi.org/10.47612/0514-7506-2022-89-2-177-183.
Full textБелько, Н. В., М. П. Самцов, and А. А. Луговский. "Спектральные свойства индотрикарбоцианинового красителя в процессе самоорганизации его H-=SUP=-*-=/SUP=-- и J-агрегатов." Журнал технической физики 128, no. 11 (2020): 1627. http://dx.doi.org/10.21883/os.2020.11.50165.84-20.
Full textWojtyk, James, Andrew McKerrow, Peter Kazmaier, and Erwin Buncel. "Quantitative investigations of the aggregation behaviour of hydrophobic anilino squaraine dyes through UV/vis spectroscopy and dynamic light scattering." Canadian Journal of Chemistry 77, no. 5-6 (June 1, 1999): 903–12. http://dx.doi.org/10.1139/v99-073.
Full textRhodes, Samuel, Wenlang Liang, Xiaochen Wang, Nitin Ramesh Reddy, and Jiyu Fang. "Transition from H-Aggregate Nanotubes to J-Aggregate Nanoribbons." Journal of Physical Chemistry C 124, no. 21 (May 1, 2020): 11722–29. http://dx.doi.org/10.1021/acs.jpcc.0c02908.
Full textDissertations / Theses on the topic "J-Aggregate"
Bradley, Michael Scott. "Engineering J-aggregate cavity exciton-polariton devices." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/53196.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 143-159).
Research efforts in solution-based dye lasers and organic light-emitting devices (OLEDs) have led to advances in materials engineering and fabrication technology, propelling the field of organic solid-state photonics. Active areas of photonic research in organic systems include solid-state lasers (in both VCSEL and DFB form factor), low-threshold optical switches, and photodetectors. In all of these areas, thin films of "Jelley aggregates," or J aggregates, offer a promising materials platform thanks to their narrow linewidth and high oscillator strength at room temperature, properties resulting from delocalization of excitations across multiple strongly-coupled molecules. By placing these films in an optical microcavity, the aggregates exhibit additional strong-coupling to the cavity electric field, creating light-matter quasi-particles known as exciton-polaritons, even at room temperature. In this thesis, I discuss my research on the properties of J-aggregate thin films and on advancing the device and materials engineering of strongly-coupled devices based on J-aggregate thin films to the level of those in inorganic semiconductor systems. Exciton-polariton systems have been extensively studied at cryogenic temperatures in II-VI and III-V semiconductor quantum well systems in the past two decades as potential low-threshold VCSELs.
(cont.) J-aggregate-based exciton-polaritons systems, however, offer many device and engineering challenges, including: understanding the role of inhomogeneous vs. homogeneous broadening in the J-aggregate optical response, fabricating higher-quality microcavities with the ability to pump the polaritons at high intensities, and lateral patterning on the single-micron scale of organic microcavities. These topics are addressed and the outlook of organic exciton-polariton device research discussed.
by M. Scott Bradley.
Ph.D.
Walker, Brian J. (Brian Jacob). "Nanocrystal/J-aggregate constructs : chemistry, energy transfer, and applications." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/65479.
Full textVita. Cataloged from PDF version of thesis.
Includes bibliographical references (p. 119-128).
The interaction of light with matter is one of the most central subjects to modern chemistry. Two types of materials, semiconductor nanocrystals and J-aggregates of cyanine dyes, have been developed chiefly due to their potential for interacting with light in interesting and productive ways. At the same time, existing spectroscopy and microscopy tools enable the study of these photonic materials, their dynamics, and their interactions. Although semiconductor nanocrystals and J-aggregates have complementary physical properties, the coupling between them requires new methods to control the interface between the organic (J-aggregate) and inorganic (nanocrystal) material. This thesis is about the interfacial chemistry, photophysical characterization, and selected applications of J-aggregated cyanine dyes conjugated with semiconductor nanocrystals. Chapter 1 begins with a brief review of J-aggregates and semiconductor nanocrystals together with referrals to other scources and motivation for the present work. Because the electronic excited states of both J-aggregates and semiconductor nanocrystals are characterized by a bound electron-hole pair, they can be grouped under the class of excitonic materials, and the coupling of J-aggregates with excitonic inorganic materials is reviewed. To control J-aggregate/nanocrystal interactions, it is important to preserve the aggregate structure while achieving favorable energy transfer. This challenge is the subject of Chapters 2 and 3, in which new ligand chemistry was developed to achieve near-unity energy transfer efficiency from the J-aggregates to the nanocrystal quantum dots in solution (Ch. 2) and in a solid state thin film (Ch. 3). These hybrid J-aggregate/nanocrystal constructs result in emission enhancement through energy transfer across the organic/inorganic interface, with the strongly-coupled J-aggregates serving as optical antennae to the nanocrystals. In the process, it was discovered that the ligand directs formation of J-aggregates onto the nanocrystal surface. In Chapter 4, the template-directing ligand is used on semiconductor nanowires grown from solution to realize a new photodetector design. Here, the excitation energy transfers from J-aggregated dyes to the nanowires, enhancing the photocurrent of the device and creating an artificial solid-state photodetector whose self assembly and aggregated antenna molecules are analogous to a photosynthetic light harvesting complex. Additionally, the nanowire/J-aggregate self-assembly generalizes to J-aggregates of three different color dyes (red/green/blue), providing a wavelength selectivity absent in biological light harvesting. In Chapter 5, the kinetics of indium phosphide (InP) semiconductor nanocrystal synthesis is discussed. InP is benficial for nanocrystal applications in biology or display technologies, as it does not contain lead or cadmium. However, the molecular mechanism of InP nanocrystal synthesis had been essentially unexplored. By studying the reaction kinetics of InP synthesis, a mechanism is proposed for InP. As in the case of the chemistry described in Chapters 2-4, it is clear that non-covalent interactions are vital to achieving control during nanocrystal synthesis.
by Brian J. Walker.
Ph.D.
Cao, Yumeng Melody. "Photostabilization of J-aggregate cyanine dyes for exciton-polariton based devices." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/118061.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 67-69).
Organic molecules are becoming a commonly used material in strongly coupled systems as they possess large exciton binding energies and huge oscillator strengths that have allowed for the creation of room temperature polariton condensates, superfluids, and other exotic phenomena. Using J-aggregates, the aggregated form of cyanine organic dyes, we have previously fabricated light-emitting devices that demonstrated the first ever electrically pumped polariton emission, as well as critically coupled resonators with record high effective absorption constants. Although there are many promising applications for organic exciton-polariton devices, state-of-the- art devices suffer from rapid photodegradation at higher photon densities, which presently limits their eventual implementation into a viable technology. To achieve stable devices, we need to isolate the causes of photodegradation. Specifically, we studied the photoluminescence stability of J-aggregate thin films under different atmospheric conditions. Our results indicated that J-aggregates maintain both better emission and stability in high humidity environments in comparison to oxygen-rich atmospheres. Furthermore, we show an order of magnitude improvement in the photostability via encapsulation of the film with a hygroscopic sugar encapsulant. These results are highly promising and suggest future pathways for the realization of functional and stable polariton-based devices which we will explore in this thesis.
by Yumeng Melody Cao.
S.M.
Tischler, Jonathan Randall 1977. "Electrically pumped polariton emission in a J-aggregate organic light emitting device." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/88358.
Full textIncludes bibliographical references (leaves 46-47).
by Jonathan Randall Tischler.
S.M.
Fylymonova, I., Yu V. Malyukin, and A. V. Sorokin. "Migration of Frenkel Excitons in PIC J-aggregates." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35095.
Full textShirasaki, Yasuhiro. "Efficient Föster energy transfer : from phosphorescent organic molecules to J-aggregate thin film." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/46500.
Full textIncludes bibliographical references (p. 53-54).
This thesis demonstrates the first ever use of Forster resonance energy transfer (FRET) to increase the quantum efficiency of a electrically pumped J-aggregate light emitting device (JLED). J-aggregate thin films are highly absorptive films that have potential applications in a new class of optoelectronic devices, known as polaritonic devices. These devices, which utilize strong coupling between light and matter, include room temperature low power optical switches and low threshold lasers. Recent work has shown that a J-aggregate strong-coupling device can be powered not just optically but also electrically. However, since J aggregates are engineered for their optical and not electrical properties, exciting them electrically is very inefficient. JLED efficiency can be improved by first exciting phosphors that readily form excitons and then employing FRET to excite the J aggregates. Attaining high efficiency can make electrical pumping a viable option to power polaritonic devices.
by Yasuhiro Shirasaki.
M.Eng.
Steeg, Egon. "Investigations on growth and structure of silver and silver halide nanostructures formed on amphiphilic dye aggregates." Doctoral thesis, Humboldt-Universität zu Berlin, 2018. http://dx.doi.org/10.18452/19577.
Full textThis thesis reports on the growth mechanism of silver iodide nanowires as revealed by conventional as well as cryogenic transmission electron microscopy. The growth, initiated by short illumination with UV light, has been observed over time scales ranging from minutes to days. In an early stage, within the tubular aggregates nanoparticles are formed which act as seeds for continuous growth of separate pieces of wires. The diameter of the wires is determined by the inner diameter of the tubes. In the final state, the pieces of wire totally fill the aggregate. The growth process indicates transport of at least silver ions through the tubular wall membrane. After homogeneously filling the template the wires grow onwards over the diameter of the nanotubes, destroying it in the process. The crystal structure of the wires was investigated by means of high resolution transmission electron microscopy and selected area electron diffraction. The silver iodide could be clearly identified in its beta-phase by its typical wurtzite structure. Since only silver nitrate was added to the solutions, the source of the iodide ions could be attributed to impurities within the dye powder itself. The fragmented growth of the wires from separate seeds leads to nanowires consisting of single crystalline domains exceeding 100 nm in length. A preferential orientation of the crystal lattice planes with respect to the aggregate axis was observed which is explained by the molecular structure of the aggregates. Based on these findings a model for the growth of silver iodide nanowires within the inner space of the tubular molecular aggregate is presented. The growth is assumed to start at silver seeds that are formed due to photo-oxidation of the already present iodide ions by the silver ions during the illumination of the sample. These silver seeds facilitate nucleation of silver iodide and subsequent growth into wires.
Kaidel, Björn [Verfasser], and J. [Akademischer Betreuer] Müller-Quade. "Fault-Tolerance and Deaggregation Security of Aggregate Signatures / Björn Kaidel ; Betreuer: J. Müller-Quade." Karlsruhe : KIT-Bibliothek, 2020. http://d-nb.info/120500193X/34.
Full textOvchinnikov, O. V., M. S. Smirnov, A. O. Dedikova, B. I. Shapiro, T. S. Shatskikh, and A. N. Latyshev. "Spectral Manifestation of Hybrid Association of Zn0.7Sd0.3S Colloidal Quantum Dots with J-Aggregates of Thiacarbocyanine Dye." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35329.
Full textSchebsdat, Erik [Verfasser], and Daniel J. [Akademischer Betreuer] Strauss. "Neural Correlates of Binaural Interaction Using Aggregate-System Stimulation in Cochlear Implantees / Erik Schebsdat ; Betreuer: Daniel J. Strauss." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2020. http://d-nb.info/1209947307/34.
Full textBooks on the topic "J-Aggregate"
Burnet, G. Experimental studies of the production of lightweight aggregate from fly ash/coal cleaning refuse mixtures / G. Burnet and A. J. Gokhale. S.l: s.n, 1987.
Find full textRotemberg, Julio. Money, output, and prices--evidence from a new monetary aggregate / by Julio J. Rotemberg, John C. Driscoll, and James M. Poterba. Cambridge, Mass: Sloan School of Management, Massachusetts Institute of Technology, 1991.
Find full textPhotographic Science: Advances in Nanoparticles, J-aggregates, Dye Sensitization, and Organic Devices. Oxford: Oxford University Press, 2011.
Find full textKobayashi, Takayoshi. J-Aggregates. WORLD SCIENTIFIC, 2011. http://dx.doi.org/10.1142/8226.
Full textAument, Lori Renée. Experimentation in concrete: John J. Earley at Meridian Hill Park, Washington, DC : history, technology, and characterization of exposed aggregate concrete. 1999.
Find full textBook chapters on the topic "J-Aggregate"
Konzett, Verena Maria. "Wettbewerbliche Banken fördern das Wachstum." In Die Wirtschaft im Wandel, 37–41. Wiesbaden: Springer Fachmedien Wiesbaden, 2021. http://dx.doi.org/10.1007/978-3-658-31735-5_6.
Full textLosytskyy, Mykhaylo Yu, and Valeriy M. Yashchuk. "Fluorescent J-Aggregates and Their Biological Applications." In Advanced Fluorescence Reporters in Chemistry and Biology II, 135–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-04701-5_4.
Full textGaizauskas, E., and K. H. Feller. "Annihilation Enhanced Four-Wave Mixing in J-Aggregates." In Ultrafast Processes in Spectroscopy, 467–69. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4615-5897-2_104.
Full textFeller, K. H., R. Gadonas, and V. Krasauskas. "Time-Resolved Absorption Spectroscopy of Polymethine J-Aggregates." In Springer Proceedings in Physics, 289–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-75826-3_57.
Full textTani, T. "Photophysics of Capped Nanocrystals and Molecular J-Aggregates." In Single Organic Nanoparticles, 185–202. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55545-9_15.
Full textBakalis, L. "Excitons in J-Aggregates: Beyond the Heitler-London Approximation." In Spectroscopy and Dynamics of Collective Excitations in Solids, 600. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-5835-4_25.
Full textKamalov, V. F., R. Inaba, I. A. Struganova, M. Tasumi, and K. Yoshihara. "Intermolecular Coherence and Vibrational Dephasing of BIC J-Aggregates." In Springer Proceedings in Physics, 39–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-85060-8_9.
Full textVirgili, T., S. Ceccarelli, L. Lüer, G. Lanzani, G. Cerullo, and D. G. Lidzey. "Coherent phonons in cyanine dye monomers and J-aggregates." In Springer Series in Chemical Physics, 370–72. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-95946-5_120.
Full textLidzey, D. G., D. D. C. Bradley, A. Armitage, T. Virgili, M. S. Skolnick, and S. Walker. "Strong Coupling in Organic Semiconductor Microcavities Based on J-Aggregates." In Multiphoton and Light Driven Multielectron Processes in Organics: New Phenomena, Materials and Applications, 357–70. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4056-0_26.
Full textAgranovich, V. M., and A. M. Kamchatnov. "Quantum Confinement and Superradiance of Self-Trapped Excitons from 1D J-Aggregates." In Multiphoton and Light Driven Multielectron Processes in Organics: New Phenomena, Materials and Applications, 109–22. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4056-0_9.
Full textConference papers on the topic "J-Aggregate"
Chovan, J., and I. E. Perakis. "Photoluminescence in J-aggregate microcavities." In 2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference. IEEE, 2006. http://dx.doi.org/10.1109/cleo.2006.4628967.
Full textMal'tsev, Eugene I., Dmitry A. Lypenko, Boris I. Shapiro, Vladimir V. Bobonkin, Jeffrey Wright, and Anatoly V. Vannikov. "Electroluminescence in polymer/j-aggregate nanostructures." In Advanced Display Technologies:Basic Studies of Problems in Information Display (FLOWERS'2000), edited by Victor V. Belyaev and Igor N. Kompanets. SPIE, 2001. http://dx.doi.org/10.1117/12.431262.
Full textMal'tsev, Eugene I., Dmitry A. Lypenko, Boris I. Shapiro, George H. W. Milburn, Jeffrey Wright, Andre Hendriksen, Vladimir I. Berendyaev, Boris V. Kotov, and Anatoly V. Vannikov. "J-aggregate electroluminescence in polymer matrices." In SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, edited by Zakya H. Kafafi. SPIE, 1999. http://dx.doi.org/10.1117/12.372716.
Full textChovan, J., and I. E. Perakis. "Theory of photoluminiscence in J-aggregate microcavities." In 2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference. IEEE, 2007. http://dx.doi.org/10.1109/cleoe-iqec.2007.4386841.
Full textKobayashi, T., and K. Misawa. "Giant Static Dipole Moment In Pseudoisocyanine J-aggregate." In Technical Digest CLEO/Pacific Rim '97 Pacific Rim Conference on Lasers and Electro-Optics. IEEE, 1997. http://dx.doi.org/10.1109/cleopr.1997.610753.
Full textMichetti, Paolo, Giuseppe C. La Rocca, Marília Caldas, and Nelson Studart. "Excitation dynamics and photoluminescence of J-aggregate microcavities." In PHYSICS OF SEMICONDUCTORS: 29th International Conference on the Physics of Semiconductors. AIP, 2010. http://dx.doi.org/10.1063/1.3295452.
Full textLienau, Christoph. "Ultrafast optical nonlinearities in hybrid metal-J-aggregate nanostructures." In Frontiers in Optics. Washington, D.C.: OSA, 2009. http://dx.doi.org/10.1364/fio.2009.fwp1.
Full textVasa, P., R. Pomraenke, S. Schwieger, E. Runge, and C. Lienau. "Ultrafast optical nonlinearities in hybrid metal-J-aggregate nanostructures." In 11th European Quantum Electronics Conference (CLEO/EQEC). IEEE, 2009. http://dx.doi.org/10.1109/cleoe-eqec.2009.5194749.
Full textVasa, Parinda, Robert Pomraenke, Stephan Schwieger, Erich Runge, and Chrsitoph Lienau. "Ultrafast Optical Nonlinearities in Hybrid Metal-J-Aggregate Nanostructures." In International Quantum Electronics Conference. Washington, D.C.: OSA, 2009. http://dx.doi.org/10.1364/iqec.2009.ituk3.
Full textEizner, Elad, Ori Avayu, Ran Ditcovski, and Tal Ellenbogen. "Exciton-plasmon hybridization in J-aggregate-aluminum nanoantenna metasurfaces." In 2015 International Conference on Optical MEMS and Nanophotonics (OMN). IEEE, 2015. http://dx.doi.org/10.1109/omn.2015.7288878.
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