Advanced Materials

Cover image for Vol. 25 Issue 18

May 14, 2013

Volume 25, Issue 18

Pages 2509–2628

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Progress Report
    8. Frontispiece
    9. Communications
    10. Frontispiece
    11. Communications
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      Plasmonic Nanostructures: Chirality and Chiroptical Effects in Plasmonic Nanostructures: Fundamentals, Recent Progress, and Outlook (Adv. Mater. 18/2013) (page 2509)

      Ventsislav K. Valev, Jeremy J. Baumberg, Concita Sibilia and Thierry Verbiest

      Version of Record online: 6 MAY 2013 | DOI: 10.1002/adma.201370114

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      Recent developments of bottom-up and topdown approaches for material design and fabrication at the nanoscale have resulted in a variety of chiral nanomaterials. Ventsislav K. Valev and co-workers highlight on page 2517 four different strategies used to achieve giant chiroptical effects in chiral nanostructures. Their nonlinear chiroptical behaviour arises from the nonlinear susceptibility tensor. For second harmonic generation, in the dipole approximation, this tensor has 3 by 3 by 3 elements and is represented in the cover image by the familiar Rubik's cube.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Progress Report
    8. Frontispiece
    9. Communications
    10. Frontispiece
    11. Communications
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      Cancer Treatment: Incorporating Graphene Oxide and Gold Nanoclusters: A Synergistic Catalyst with Surprisingly High Peroxidase-Like Activity Over a Broad pH Range and its Application for Cancer Cell Detection (Adv. Mater. 18/2013) (page 2510)

      Yu Tao, Youhui Lin, Zhenzhen Huang, Jinsong Ren and Xiaogang Qu

      Version of Record online: 6 MAY 2013 | DOI: 10.1002/adma.201370115

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      Graphene oxide (GO) can serve as the enzyme modulator to regulate the peroxidase-like activity of the Au nanoclusters (AuNCs), as reported by Xiaogang Qu, Jinsong Ren, and co-workers on page 2594. The most exciting feature of the GO-AuNCs hybrid is that it exhibits high catalytic activity over a broad pH range, and even at neutral pH. Inspired by this, the hybrid can also be applied as a robust nanoprobe for selective, quantitative, and fast colorimetric detection of cancer cells.

  3. Back Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Progress Report
    8. Frontispiece
    9. Communications
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    11. Communications
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      Aerogels: Multifunctional, Ultra-Flyweight, Synergistically Assembled Carbon Aerogels (Adv. Mater. 18/2013) (page 2632)

      Haiyan Sun, Zhen Xu and Chao Gao

      Version of Record online: 6 MAY 2013 | DOI: 10.1002/adma.201370116

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      Light and strong long-span structures such as the roofs of stadiums and airports co-constructed from steel wires and polymer membranes are widely observed. On page 2554, Chao Gao and co-workers report ultra-flyweight, super-elastic materials with mimic microstructures achieved by co-assembly of carbon nanotubes and graphene sheets.

  4. Masthead

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    3. Inside Front Cover
    4. Back Cover
    5. Masthead
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    8. Frontispiece
    9. Communications
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      Masthead: (Adv. Mater. 18/2013)

      Version of Record online: 6 MAY 2013 | DOI: 10.1002/adma.201370117

  5. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Progress Report
    8. Frontispiece
    9. Communications
    10. Frontispiece
    11. Communications
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  6. Progress Report

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Progress Report
    8. Frontispiece
    9. Communications
    10. Frontispiece
    11. Communications
    1. Chirality and Chiroptical Effects in Plasmonic Nanostructures: Fundamentals, Recent Progress, and Outlook (pages 2517–2534)

      Ventsislav K. Valev, Jeremy J. Baumberg, Concita Sibilia and Thierry Verbiest

      Version of Record online: 2 APR 2013 | DOI: 10.1002/adma.201205178

      Thumbnail image of graphical abstract

      Due to the recent development of bottom-up and top-down approaches for material design and fabrication at the nanoscale, giant chiroptical effects have been reported from plasmonic nanostructures. These effects are exhibited both in the linear and in the nonlinear optical regimes and are sensitive to the chirality of nanostructures, the chirality of the experiments and the chirality of light itself.

  7. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Progress Report
    8. Frontispiece
    9. Communications
    10. Frontispiece
    11. Communications
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      One Step Formation of Controllable Complex Emulsions: From Functional Particles to Simultaneous Encapsulation of Hydrophilic and Hydrophobic Agents into Desired Position (Adv. Mater. 18/2013) (page 2535)

      Chang-Hyung Choi, David A. Weitz and Chang-Soo Lee

      Version of Record online: 6 MAY 2013 | DOI: 10.1002/adma.201370119

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      Chang-Soo Lee and co-workers report on page 2536 the preparation of complex multiple emulsions in a single step, which provides precise control over the morphology of the droplets, the platform for synthesizing functional materials, and perfect encapsulation and compartmentalization of active ingredient into a desired position in an emulsion.

  8. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Progress Report
    8. Frontispiece
    9. Communications
    10. Frontispiece
    11. Communications
    1. One Step Formation of Controllable Complex Emulsions: From Functional Particles to Simultaneous Encapsulation of Hydrophilic and Hydrophobic Agents into Desired Position (pages 2536–2541)

      Chang-Hyung Choi, David A. Weitz and Chang-Soo Lee

      Version of Record online: 22 MAR 2013 | DOI: 10.1002/adma.201204657

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      This article presents a one-step method for generating complex emulsions that exploits the phase separation of the emulsion droplet generated in the microchannel. This approach easily produces double, triple, quadruple, and Janus emulsions with monodisperse size. These emulsions can be used as useful templates for the synthesis of new functional materials, such as microcapsules, hemispheres, Janus particles and microcarriers that are capable of simultaneously encapsulating hydrophilic and hydrophobic compounds with selective compartmentalization in a one-step process.

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      Discovery of Novel Materials with Broad Resistance to Bacterial Attachment Using Combinatorial Polymer Microarrays (pages 2542–2547)

      Andrew L. Hook, Chien-Yi Chang, Jing Yang, Steve Atkinson, Robert Langer, Daniel G. Anderson, Martyn C. Davies, Paul Williams and Morgan R. Alexander

      Version of Record online: 18 FEB 2013 | DOI: 10.1002/adma.201204936

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      A new class of bacteria-attachment-resistant materials is discovered using a multi-generation polymer microarray methodology that reduces bacterial attachment by up to 99.3% compared with a leading commercially available silver hydrogel anti-bacterial material. The coverage of three bacterial species, Pseudomonas aeruginosa, Staphylococcus aureus, and uropathogenic Escherichia coli is assessed.

    3. Transparent Stretchable Single-Walled Carbon Nanotube-Polymer Composite Films with Near-Infrared Fluorescence (pages 2548–2553)

      Rujun Ma, Mini Mol Menamparambath, Pavel Nikolaev and Seunghyun Baik

      Version of Record online: 6 MAR 2013 | DOI: 10.1002/adma.201205026

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      We report transparent stretchable single-walled carbon nanotube-polymer composite films that emit pronounced Raman and near-infrared fluorescence with a fine spatial resolution. The independent modulation in Raman and fluorescence spectra is demonstrated in response to touch and temperature. The optical signal transduction of transparent stretchable optoelectronic films may enable a paradigm shift in touch-sensing devices eliminating electrical interconnects.

    4. Multifunctional, Ultra-Flyweight, Synergistically Assembled Carbon Aerogels (pages 2554–2560)

      Haiyan Sun, Zhen Xu and Chao Gao

      Version of Record online: 18 FEB 2013 | DOI: 10.1002/adma.201204576

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      All carbon aerogels (up to 1000 cm3) with ultralow density (down to 0.16 mg cm−3) and temperature-invariant (-190–900 °C) super-elasticity are fabricated by facile assembling of commercial carbon nanotubes (CNTs) and chemically-converted giant graphene sheets, on the basis of the synergistic effect between elastic CNTs ribs and giant graphene cell walls.

  9. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Progress Report
    8. Frontispiece
    9. Communications
    10. Frontispiece
    11. Communications
    1. You have free access to this content
      Structural and Optoelectronic Characterization of RF Sputtered ZnSnN2 (Adv. Mater. 18/2013) (page 2561)

      Lise Lahourcade, Naomi C. Coronel, Kris T. Delaney, Sujeet K. Shukla, Nicola A. Spaldin and Harry A. Atwater

      Version of Record online: 6 MAY 2013 | DOI: 10.1002/adma.201370120

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      The development of earth-abundant semiconductors is an important step in working towards the realization of photovoltaic production on a global scale. On page 2562, Harry A. Atwater and co-workers successfully synthesize stoichiometric ZnSnN2, a new earth-abundant semiconductor material, which has a theoretical direct band gap of 1.42 eV, making it well suited for potential applications in thin film photovoltaics.

  10. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Progress Report
    8. Frontispiece
    9. Communications
    10. Frontispiece
    11. Communications
    1. Structural and Optoelectronic Characterization of RF Sputtered ZnSnN2 (pages 2562–2566)

      Lise Lahourcade, Naomi C. Coronel, Kris T. Delaney, Sujeet K. Shukla, Nicola A. Spaldin and Harry A. Atwater

      Version of Record online: 6 FEB 2013 | DOI: 10.1002/adma.201204718

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      ZnSnN2, a new earth-abundant semiconductor, is synthesized and characterized for use as a photovoltaic absorber material. Results confirm the predicted orthorhombic Pna21 crystal structure in RF sputtered thin films. Additionally, optical measurements reveal a direct bandgap of about 2 eV, which is larger than our calculated bandgap of 1.42 eV due to the Burstein-Moss effect.

    2. Ion-Induced Synthesis of Uniform Single-Crystalline Sulphide-Based Quaternary-Alloy Hexagonal Nanorings for Highly Efficient Photocatalytic Hydrogen Evolution (pages 2567–2572)

      Peng Hu, Stevin Snellius Pramana, Shaowen Cao, Chee Keong Ngaw, Jingdong Lin, Say Chye Joachim Loo and Timothy Thatt Yang Tan

      Version of Record online: 28 FEB 2013 | DOI: 10.1002/adma.201204545

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      Uniform single-crystalline quaternary sulphide nanoring photocatalysts are synthesized via the copper-ion-induced Kirkendall effect and is followed by a cation exchange reaction. The obtained Cu2+-doped ZnIn2S4 nanorings show highly preserved morphology, and demonstrate high visible-light-driven photocatalytic activity for H2 evolution in water splitting.

    3. Single-Doped White Organic Light-Emitting Device with an External Quantum Efficiency Over 20% (pages 2573–2576)

      Tyler Fleetham, Jeremy Ecton, Zixing Wang, Nathan Bakken and Jian Li

      Version of Record online: 6 MAR 2013 | DOI: 10.1002/adma.201204602

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      A white OLED with a maximum EQE of 20.1%, CIE coordinates of (0.33, 0.33) and CRI of 80 is fabricated based on platinum(II) bis(N-methyl-imidazolyl)benzene chloride (Pt–16). The device emission spectrum and the chemical structure of Pt–16 are shown in the inset of the efficiency versus luminance graph.

    4. Zinc Exhibits Ideal Physiological Corrosion Behavior for Bioabsorbable Stents (pages 2577–2582)

      Patrick K. Bowen, Jaroslaw Drelich and Jeremy Goldman

      Version of Record online: 14 MAR 2013 | DOI: 10.1002/adma.201300226

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      Zinc is proposed as an exciting new biomaterial for use in bioabsorbable cardiac stents. Not only is zinc a physiologically relevant metal with behavior that promotes healthy vessels, but it combines the best behaviors of both current bioabsorbable stent materials: iron and magnesium. Shown here is a composite image of zinc degradation in a murine (rat) artery.

    5. A Fluorinated Phenylene Unit as a Building Block for High-Performance n-Type Semiconducting Polymer (pages 2583–2588)

      Jung Ha Park, Eui Hyuk Jung, Jae Woong Jung and Won Ho Jo

      Version of Record online: 22 MAR 2013 | DOI: 10.1002/adma.201205320

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      Copolymers composed of diketopyrrolopyrrole and phenylene units with different numbers of fluorine subsitution are synthesized. When the effect of the number of fluorine substitution on the n-channel transporting property is investigated, the polymer with four fluorine substitutions exhibits the best n-type charge-transporting behavior with an electron mobility of 2.36 cm2 V−1 s1.

    6. Hierarchical Tubular Structures Constructed by Carbon-Coated SnO2 Nanoplates for Highly Reversible Lithium Storage (pages 2589–2593)

      Lei Zhang, Genqiang Zhang, Hao Bin Wu, Le Yu and Xiong Wen (David) Lou

      Version of Record online: 2 APR 2013 | DOI: 10.1002/adma.201300105

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      Hierarchical tubular structures constructed by ultrathin carbon-coated SnO2 nanoplates are rationally designed and synthesized. This interesting structure simultaneously integrates the structural and compositional design rationales for high-energy anode materials based on low-dimensional ultrathin nanoplates, a hollow tubular structure, and a carbon nanocoating. When evaluated as an anode material for lithium-ion batteries, the as-synthesized SnO2-carbon hybrid structure manifests high specific capacity and excellent cycling stability.

    7. Incorporating Graphene Oxide and Gold Nanoclusters: A Synergistic Catalyst with Surprisingly High Peroxidase-Like Activity Over a Broad pH Range and its Application for Cancer Cell Detection (pages 2594–2599)

      Yu Tao, Youhui Lin, Zhenzhen Huang, Jinsong Ren and Xiaogang Qu

      Version of Record online: 15 FEB 2013 | DOI: 10.1002/adma.201204419

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      A synergistic graphene oxide–gold nanocluster (GO-AuNC) hybrid has been constructed as an enzyme mimic that is able to show high catalytic activity over a broad pH range, especially at neutral pH. Importantly, the target-functionalized hybrid has been applied as a robust nanoprobe for selective, quantitative, and fast colorimetric detection of cancer cells.

    8. Electron Accepting Porphycenes on Graphene (pages 2600–2605)

      Rubén D. Costa, Jenny Malig, Wolfgang Brenner, Norbert Jux and Dirk M. Guldi

      Version of Record online: 3 APR 2013 | DOI: 10.1002/adma.201300231

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      The versatility of nanographene (NG) as an electron donor is demonstrated when integrated together with an electron accepting porphycene into a novel electron NG hybrid. This feature is further exploited in dye-sensitized solar cells (DSSCs), in which photoanodes (ZnO) reveal a cascade of electron flow as modus operandi.

    9. Defined Polymer–Peptide Conjugates to Form Cell-Instructive starPEG–Heparin Matrices In Situ (pages 2606–2610)

      Mikhail V. Tsurkan, Karolina Chwalek, Silvana Prokoph, Andrea Zieris, Kandice R. Levental, Uwe Freudenberg and Carsten Werner

      Version of Record online: 10 APR 2013 | DOI: 10.1002/adma.201300691

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      Poly(ethylene glycol)-peptide- and glycosaminoglycan-peptide conjugates obtained by a regio-selective amino acid protection strategy are converted into cell-instructive hydrogel matrices capable of inducing morphogenesis in embedded human vascular endothelial cells and dorsal root ganglia.

    10. Use of Magnetic Forces to Promote Stem Cell Aggregation During Differentiation, and Cartilage Tissue Modeling (pages 2611–2616)

      D. Fayol, G. Frasca, C. Le Visage, F. Gazeau, N. Luciani and C. Wilhelm

      Version of Record online: 22 MAR 2013 | DOI: 10.1002/adma.201300342

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      Magnetic forces induce cell condensation necessary for stem cell differentiation into cartilage and elicit the formation of a tissue-like structure: Magnetically driven fusion of aggregates assembled by micromagnets results in the formation of a continuous tissue layer containing abundant cartilage matrix.

    11. Broadband Light-Trapping Enhancement in an Ultrathin Film a-Si Absorber Using Whispering Gallery Modes and Guided Wave Modes with Dielectric Surface-Textured Structures (pages 2617–2623)

      Gumin Kang, Haesung Park, Dongheok Shin, Seunghwa Baek, Minjung Choi, Dai-Hyuk Yu, Kyoungsik Kim and Willie J. Padilla

      Version of Record online: 26 MAR 2013 | DOI: 10.1002/adma.201204596

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      An embedded nanosphere dielectric structure on an a-Si ultrathin film improves weighted absorption from 23.8% to 39.9%. The PMMA embedding layer offers a guided wave mode as well as mechanical robustness, in addition to the resonant whispering gallery modes coupling. Broadband light-trapping enhancements are observed by dielectric surface textured structures of hemispheres, nanocones, nanospheres, or embedded nanospheres.

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      Induction of Circularly Polarized Electroluminescence from an Achiral Light-Emitting Polymer via a Chiral Small-Molecule Dopant (pages 2624–2628)

      Ying Yang, Rosenildo Correa da Costa, Detlef-M. Smilgies, Alasdair J. Campbell and Matthew J. Fuchter

      Version of Record online: 2 APR 2013 | DOI: 10.1002/adma.201204961

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      By simply doping the conventional light-emitting polymer F8BT with a helically chiral aromatic molecule, it is shown that substantial levels of CP-electroluminescence can be generated directly. Both photoluminescent and electroluminescent emission from the polymer are observed to become circularly polarized, with the sign of the CP emission directly determined by the handedness of the dopant.

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