Advanced Optical Materials

Cover image for Vol. 2 Issue 7

July 2014

Volume 2, Issue 7

Pages 599–693

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Communications
    8. Frontispiece
    9. Full Papers
    1. You have free access to this content
      Light Harvesting: Near-Infrared Harvesting Transparent Luminescent Solar Concentrators (Advanced Optical Materials 7/2014) (page 599)

      Yimu Zhao, Garrett A. Meek, Benjamin G. Levine and Richard R. Lunt

      Article first published online: 15 JUL 2014 | DOI: 10.1002/adom.201470040

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      A transparent luminescent solar concentrator that selectively harvests NIR photons is demonstrated. On page 606, R. R. Lunt and co-workers describe the photophysical and electronic properties of the luminophores, the impact of ligandhost control, and the optimization of the solar concentrator architectures to realize their potential for use in electronic displays, solar windows, and other glazing systems with high defect tolerances and processability.

  2. Inside Front Cover

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    1. Magnetoplasmonics: Magnetoplasmonic Nanorings as Novel Architectures with Tunable Magneto-optical Activity in Wide Wavelength Ranges (Advanced Optical Materials 7/2014) (page 600)

      Hua Yu Feng, Feng Luo, Renata Kekesi, Daniel Granados, David Meneses-Rodríguez, Jorge M. García, Antonio García-Martín, Gaspar Armelles and Alfonso Cebollada

      Article first published online: 15 JUL 2014 | DOI: 10.1002/adom.201470041

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      Au/Co/Au magnetoplasmonic nanorings present a bimodal spectral dependence of the magnetooptical activity, with maximum values in the visible and NIR regions. On page 612, the spectral positions of these maxima are tuned by F. Luo, A. Cebollada, and co-workers by modifying the structural parameters of the rings. This controlled modification of the magneto-optical activity of nanostructured systems may find interesting applications in areas like sensing, optical communications, and isolators.

  3. Back Cover

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    5. Masthead
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    1. Microresonators: A New Route for Fabricating On-Chip Chalcogenide Microcavity Resonator Arrays (Advanced Optical Materials 7/2014) (page 696)

      Ozan Aktas, Erol Ozgur, Osama Tobail, Mehmet Kanik, Ersin Huseyinoglu and Mehmet Bayindir

      Article first published online: 15 JUL 2014 | DOI: 10.1002/adom.201470045

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      Chalcogenides are promising materials for photonics due to their extraordinary optical properties. In order to achieve their full technological exploitation, they must be manufactured in photonic devices with various geometries necessitated by their unique optical functionalities. On page 618, M. Bayindir and co-workers develop a new route for the fabrication of on-chip photonic elements. This novel technique provides a low-cost, high-yield production method with a compatible and extendable integration phase.

  4. Masthead

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    1. Masthead: (Advanced Optical Materials 7/2014)

      Article first published online: 15 JUL 2014 | DOI: 10.1002/adom.201470044

  5. Contents

    1. Top of page
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    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
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    1. Contents: (Advanced Optical Materials 7/2014) (pages 601–605)

      Article first published online: 15 JUL 2014 | DOI: 10.1002/adom.201470042

  6. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Communications
    8. Frontispiece
    9. Full Papers
    1. Near-Infrared Harvesting Transparent Luminescent Solar Concentrators (pages 606–611)

      Yimu Zhao, Garrett A. Meek, Benjamin G. Levine and Richard R. Lunt

      Article first published online: 7 MAY 2014 | DOI: 10.1002/adom.201400103

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      Near-infrared (NIR) harvesting transparent luminescent solar concentrators (TLSC) with non-tinted transparency are demonstrated by exploiting the excitonic nature of organic luminescent salts that provide perfectly tuned NIR-selective absorption and even deeper NIR emission. NIR TLSCs provide an entirely new route to more aesthetically pleasing light harvesting systems that can be widely deployed in energy scavenging windows and displays.

    2. Magnetoplasmonic Nanorings as Novel Architectures with Tunable Magneto-optical Activity in Wide Wavelength Ranges (pages 612–617)

      Hua Yu Feng, Feng Luo, Renata Kekesi, Daniel Granados, David Meneses-Rodríguez, Jorge M. García, Antonio García-Martín, Gaspar Armelles and Alfonso Cebollada

      Article first published online: 8 MAY 2014 | DOI: 10.1002/adom.201400125

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      Multiresonant Au/Co/Au magnetoplasmonic nanorings exhibit magneto-optical (MO) activity that extends from the visible to the near infrared region. The spectral position and intensity of the MO features can be controlled by modifying the rings’ structural parameters, opening new routes for the design of systems with interest in sensing, optical communications and isolators.

    3. A New Route for Fabricating On-Chip Chalcogenide Microcavity Resonator Arrays (pages 618–625)

      Ozan Aktas, Erol Ozgur, Osama Tobail, Mehmet Kanik, Ersin Huseyinoglu and Mehmet Bayindir

      Article first published online: 6 MAY 2014 | DOI: 10.1002/adom.201400072

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      High-yield production and on-chip integration of high-Q chalcogenide microresonators with various sizes and geometrical shapes (spherical, spheroidal, and ellipsoidal) and with sub-nanometer surface roughness is achieved. The high-throughput and low-cost production of chalcogenide spherical microresonators works via inducing a Plateau-Rayleigh instability within a multimaterial fiber in extended lengths.

    4. Staggered Face-to-Face Molecular Stacking as a Strategy for Designing Deep-Blue Electroluminescent Materials with High Carrier Mobility (pages 626–631)

      Wen-Cheng Chen, Yi Yuan, Guang-Fu Wu, Huai-Xin Wei, Li Tang, Qing-Xiao Tong, Fu-Lung Wong and Chun-Sing Lee

      Article first published online: 20 MAR 2014 | DOI: 10.1002/adom.201400078

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      Synergy between optical and electrical properties, namely, deep-blue emission (color saturation: (0.15,0.10)) and a high carrier mobility (stemming from π–π stacking) are demonstrated in a novel planar linear molecular design for effective deep-blue electroluminescence with a yield of 5.48 cd A−1.

    5. Direct Writing of Metallic Nanoparticle Concentric Multi-Ring Structures by Template-Directed Convective Self-Assembly Processes (pages 632–635)

      Shengjie Zhai, Yingtao Jiang, Hui Zhao and Biswajit Das

      Article first published online: 14 APR 2014 | DOI: 10.1002/adom.201400053

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      A simple direct writing method using template-directed convective self-assembly is employed to fabricate concentric multi-ring structures of metallic nanoparticles. The concentric ring-type nanostructures, combined with a gold film, effectively induce a collective surface plasmon resonance, evidenced by a significant enhancement of the fluorescence intensities and Raman signals. This method opens possibilities for many advanced applications, including biosensing and nanophotonics.

    6. Concentration- and Solvent-Dependent Photochemical Instability of 6,13-Bis(triisopropysilylethynyl)pentacene (pages 636–640)

      Laila Abu-Sen, John J. Morrison, Andrew B. Horn and Stephen G. Yeates

      Article first published online: 3 APR 2014 | DOI: 10.1002/adom.201400003

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      The solvent- and concentration-dependent photostability of TIPS-pentacene in solution is directly related to the efficiency of singlet-state deactivation by a combination of pairwise interactions and quenching at low concentration. At higher concentrations, further increases in stability suggest the onset of aggregation.

    7. Ultrahigh Photoresponse of Few-Layer TiS3 Nanoribbon Transistors (pages 641–645)

      Joshua O. Island, Michele Buscema, Mariam Barawi, José M. Clamagirand, José R. Ares, Carlos Sánchez, Isabel J. Ferrer, Gary A. Steele, Herre S. J. van der Zant and Andres Castellanos-Gomez

      Article first published online: 8 APR 2014 | DOI: 10.1002/adom.201400043

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      TiS3 nanoribbons with thickness down to 15 nm are isolated by viscoelastic mechanical exfoliation. Field-effect transistors are fabricated and their electrical characteristics are studied in the dark state and upon illumination. An ultrahigh photoresponse up to 3000 A/W, a bandgap of 1 eV, and response times of about 4 ms are found making TiS3 a state-of-the-art material in photodetection.

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      Controlled, Bio-inspired Self-Assembly of Cellulose-Based Chiral Reflectors (pages 646–650)

      Ahu Gumrah Dumanli, Gen Kamita, Jasper Landman, Hanne van der Kooij, Beverley J. Glover, Jeremy J. Baumberg, Ullrich Steiner and Silvia Vignolini

      Article first published online: 30 MAY 2014 | DOI: 10.1002/adom.201400112

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      The self-assembly process of photonic structures made of cellulose nanocrystals is studied in detail by locally monitoring and controlling water evaporation. Three different stages during the evaporation process are identified. Spectroscopy quantifies the amount of disorder in the fabricated samples. Control of this process enables the selection of a range of different colors starting from the same suspension, providing a facile, sustainable route for the manufacture of structural color.

  7. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Communications
    8. Frontispiece
    9. Full Papers
    1. Hydrogels: Robust Mechanochromic Elastic One-Dimensional Photonic Hydrogels for Touch Sensing and Flexible Displays (Advanced Optical Materials 7/2014) (page 651)

      Xiao-Qiao Wang, Cai-Feng Wang, Zhen-Fang Zhou and Su Chen

      Article first published online: 15 JUL 2014 | DOI: 10.1002/adom.201470043

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      On page 652, S. Chen and co-workers exploit a magnetic assembly technique for the fabrication of mechanochromic hydrogels sensitive in a low pressure regime. These photonic materials, made from 1D arrays of Fe3O4 nanoparticles immobilized in elastic hydrogels, show reversible wide color variation within 1 s through a compression-decompression process. Slight touches on the hydrogels, with pressures down to 1 kPa, can induce visual color changes, suggesting an alternative for flexible touch sensors and displays.

  8. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Communications
    8. Frontispiece
    9. Full Papers
    1. Robust Mechanochromic Elastic One-Dimensional Photonic Hydrogels for Touch Sensing and Flexible Displays (pages 652–662)

      Xiao-Qiao Wang, Cai-Feng Wang, Zhen-Fang Zhou and Su Chen

      Article first published online: 19 APR 2014 | DOI: 10.1002/adom.201300538

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      Elastic photonic hydrogels (EPHs) with one-dimensional ordered chain-like colloidal crystal arrays of magnetically active monodisperse nanoclusters are synthesized, and exhibit versatile mechanochromic behavior with advanced sensitivity and interesting potentials for touch sensing, color-based switching, and flexible displays.

    2. Injection Molding of Free-Standing, Three-Dimensional, All-Metal Terahertz Metamaterials (pages 663–669)

      Jinqi Wang, Shuchang Liu, Sivaraman Guruswamy and Ajay Nahata

      Article first published online: 17 APR 2014 | DOI: 10.1002/adom.201400094

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      Free-standing two- and three-dimensional terahertz metamaterials are fabricated via injection molding of gallium, a metal that melts at temperatures just slightly above room temperature. The liquid metal is injected into elastomeric molds in which the desired geometry is inscribed. The metal does not solidify when cooled below the freezing temperature, but rather requires contact with a solid piece of gallium metal to do so.

    3. Anomalous NIR Luminescence in Mn2+-Doped Fluoride Perovskite Nanocrystals (pages 670–678)

      Enhai Song, Sha Ding, Ming Wu, Shi Ye, Fen Xiao, Shifeng Zhou and Qinyuan Zhang

      Article first published online: 24 MAR 2014 | DOI: 10.1002/adom.201400066

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      An anomalous NIR emission band centered at 770 nm is demonstrated in KZnF3:Yb3+,Mn2+ nanocrystals upon excitation by a 976 nm laser diode or 396 nm UV light using a heavy doping strategy. A new upconversion mechanism based on the Yb3+–Mn2+–Mn2+ trimer is proposed. The NIR emission band has very promising applications in high-resolution and high-penetration biological imaging.

    4. Tunable Plasmon Enhancement of Gold/Semiconductor Core/Shell Hetero-Nanorods with Site-Selectively Grown Shell (pages 679–686)

      Fan Nan, Shan Liang, Jia-Hong Wang, Xiao-Li Liu, Da-Jie Yang, Xue-Feng Yu, Li Zhou, Zhong-Hua Hao and Qu-Quan Wang

      Article first published online: 14 APR 2014 | DOI: 10.1002/adom.201400034

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      Metal/semiconductor Au/Ag2S core/shell hetero-nanorods with controlled morphology are synthesized by site-selective growth of Ag2S shells onto Au nanorod seeds. The Au/Ag2S core/shell nanorods result in a shell morphology controlled plasmon resonance and local field confinements, and thus lead to the efficient increase of the nonlinear refraction and saturable intensity of the Au nanorods.

    5. Combining Positive and Negative Dichroic Fluorophores for Advanced Light Management in Luminescent Solar Concentrators (pages 687–693)

      Michael G. Debije, Christopher Menelaou, Laura M. Herz and Albertus P. H. J. Schenning

      Article first published online: 3 MAY 2014 | DOI: 10.1002/adom.201400132

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      The main axis common fluorescent dye Lumogen Red305 aligns perpendicular to the alignment direction of its liquid crystal host. This unusual alignment allows enhanced light control in luminescent solar concentrators based on solid films and switchable ‘window' geometries. The windows can switch between different colors and show dye-specific edge emission.

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