Advanced Functional Materials

Cover image for Vol. 23 Issue 43

November 20, 2013

Volume 23, Issue 43

Pages 5337–5450

  1. Cover Picture

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    4. Masthead
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      Hydrogels: Remote-Controlled Hydrogel Depots for Time-Scheduled Vaccination (Adv. Funct. Mater. 43/2013) (page 5337)

      Raphael J. Gübeli, Désirée Hövermann, Hanna Seitz, Balder Rebmann, Ronald G. Schoenmakers, Martin Ehrbar, Ghislaine Charpin-El Hamri, Marie Daoud-El Baba, Martin Werner, Martin Müller and Wilfried Weber

      Article first published online: 15 NOV 2013 | DOI: 10.1002/adfm.201370218

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      W. Weber and co-workers present a stimulusresponsive biohybrid material which allows the release of vaccines in a remote-controlled manner in vivo. The orally administered stimulus molecule fluorescein reaches the polyethylene glycolbased depot via the bloodstream, leading to its dissolution and the release of the incorporated vaccine particles. On page 5355, the applicability of this material is demonstrated in mice by the time-controlled release of the vaccine from the body finally resulting in successful immunoprotection. The cover image is courtesy of Olaf Baldini.

  2. Inside Front Cover

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    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
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      Drug Delivery: Gold Nanocage-Based Dual Responsive “Caged Metal Chelator” Release System: Noninvasive Remote Control with Near Infrared for Potential Treatment of Alzheimer's Disease (Adv. Funct. Mater. 43/2013) (page 5338)

      Peng Shi, Meng Li, Jinsong Ren and Xiaogang Qu

      Article first published online: 15 NOV 2013 | DOI: 10.1002/adfm.201370219

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      X. Qu and colleagues report a noninvasive, remote-controlled, drug-delivery system based on gold nanocages. This system, outlined on page 5412, realizes a dual-responsive enhanced metal-ion chelator release for Alzheimer's disease therapy. Through remote control with near infrared light, the new design allows spatial/temporal controlled release of the cargo molecules for higher therapeutic efficacy.

  3. Masthead

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      Masthead: (Adv. Funct. Mater. 43/2013)

      Article first published online: 15 NOV 2013 | DOI: 10.1002/adfm.201370220

  4. Contents

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    4. Masthead
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      Contents: (Adv. Funct. Mater. 43/2013) (pages 5339–5343)

      Article first published online: 15 NOV 2013 | DOI: 10.1002/adfm.201370221

  5. Frontispiece

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    4. Masthead
    5. Contents
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      Graphene Oxide: Scalable One-Step Wet-Spinning of Graphene Fibers and Yarns from Liquid Crystalline Dispersions of Graphene Oxide: Towards Multifunctional Textiles (Adv. Funct. Mater. 43/2013) (page 5344)

      Rouhollah Jalili, Seyed Hamed Aboutalebi, Dorna Esrafilzadeh, Roderick L. Shepherd, Jun Chen, Sima Aminorroaya-Yamini, Konstantin Konstantinov, Andrew I. Minett, Joselito M. Razal and Gordon G. Wallace

      Article first published online: 15 NOV 2013 | DOI: 10.1002/adfm.201370222

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      The formation of liquid crystalline graphene oxide dispersions by J. M. Razal, G. G. Wallace, and co-workers enables the production of fibers and yarns with excellent mechanical properties as well as high thermal and electrical conductivities. On page 5345, the dispersions are shown to be amenable to a range of solution-based processing methods to create graphene-based architectures.

  6. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Masthead
    5. Contents
    6. Frontispiece
    7. Full Papers
    1. Scalable One-Step Wet-Spinning of Graphene Fibers and Yarns from Liquid Crystalline Dispersions of Graphene Oxide: Towards Multifunctional Textiles (pages 5345–5354)

      Rouhollah Jalili, Seyed Hamed Aboutalebi, Dorna Esrafilzadeh, Roderick L. Shepherd, Jun Chen, Sima Aminorroaya-Yamini, Konstantin Konstantinov, Andrew I. Minett, Joselito M. Razal and Gordon G. Wallace

      Article first published online: 27 MAY 2013 | DOI: 10.1002/adfm.201300765

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      New insights are provided into the processing of liquid crystalline graphene oxide (GO) dispersion (containing large GO sheets) demonstrating a facile and scalable production of GO and reduced GO fibers and yarns with exciting properties such as high thermal conductivity. These results provide a universal platform for the development of solution-based processing methods, properties, and applications of liquid crystalline GO-based architectures.

    2. Remote-Controlled Hydrogel Depots for Time-Scheduled Vaccination (pages 5355–5362)

      Raphael J. Gübeli, Désirée Hövermann, Hanna Seitz, Balder Rebmann, Ronald G. Schoenmakers, Martin Ehrbar, Ghislaine Charpin-El Hamri, Marie Daoud-El Baba, Martin Werner, Martin Müller and Wilfried Weber

      Article first published online: 5 JUN 2013 | DOI: 10.1002/adfm.201300875

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      A pharmacologically controlled hydrogel depot is presented allowing for the scheduled induction of a medical response in vivo. The vaccine-loaded hydrogel depot is administered to mice. At the desired point in time, the vaccine can be released from the depot by the oral administration of the stimulus molecule fluorescein resulting in protective immunization.

    3. A Graphene Oxide and Copper-Centered Metal Organic Framework Composite as a Tri-Functional Catalyst for HER, OER, and ORR (pages 5363–5372)

      Maryam Jahan, Zhaolin Liu and Kian Ping Loh

      Article first published online: 21 MAY 2013 | DOI: 10.1002/adfm.201300510

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      A graphene oxide and copper-centered metal organic framework composite shows good performance as a tri-functional catalyst for the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR).

    4. Multiple Structural Coloring of Silk-Fibroin Photonic Crystals and Humidity-Responsive Color Sensing (pages 5373–5380)

      Ying Ying Diao, Xiang Yang Liu, Guoyang William Toh, Lei Shi and Jian Zi

      Article first published online: 27 MAY 2013 | DOI: 10.1002/adfm.201203672

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      Structural coloration has attracted considerable attention in a variety of research areas. By exploring effective methods to mimic the unique properties of natural structural color, i.e., bistructural color reflection and responsive properties, the applications of structural color are expanded. A biomaterial (silk) is used to mimic structural color and can be adopted in the eco-dying industry.

    5. Hierarchically Structured, Double-Periodic Inverse Composite Opals (pages 5381–5389)

      Markus Retsch and Ulrich Jonas

      Article first published online: 31 MAY 2013 | DOI: 10.1002/adfm.201300803

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      A versatile colloidal templating strategy to fabricate hierarchically structured inverse opals is investigated. Using sequential infiltration and pyrolysis steps allow to combine a range of materials such as SiO2, Al2O3, or TiO2. The experimental results also document the feasibility of this method to access porous polymer films with a double periodic pore lattice.

    6. A Critical Revision of the Nano-Morphology of Proton Conducting Ionomers and Polyelectrolytes for Fuel Cell Applications (pages 5390–5397)

      Klaus-Dieter Kreuer and Giuseppe Portale

      Article first published online: 3 JUN 2013 | DOI: 10.1002/adfm.201300376

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      This revision of the nano-morphology of hydrated Nafion demostrates that the recently published “parallel cylinder model” is most likely biased by a large uncertainty of the experimentally determined water content. The more extended data base presented here is consistent with locally flat and narrow water domains as illustrated in the cartoon. This structural motif is suggested to be a common feature of most ionomers and polyelectrolytes.

    7. Pressure Sensing and Electronic Amplification with Functionalized Graphite–Silicone Composite (pages 5398–5402)

      Samuel Littlejohn, Alain Nogaret, Giles M. Prentice and G. Dan Pantos

      Article first published online: 31 MAY 2013 | DOI: 10.1002/adfm.201300519

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      A flexible yet electronically active composite that mimics mechanoreceptor neurons in the human skin is synthesized, generating voltage oscillations whose frequency increases with pressure. By encoding pressure into frequency, the sensor achieves a high pressure sensitivity (<10 Pa). The ability to sense pressure and to amplify signals arises from the robust negative differential resistance of functionalized graphitic flakes in silicone.

    8. Non-Viral Co-Delivery of the Four Yamanaka Factors for Generation of Human Induced Pluripotent Stem Cells via Calcium Phosphate Nanocomposite Particles (pages 5403–5411)

      Xia Cao, Wenwen Deng, Rui Qu, Qingtong Yu, Jun Li, Yan Yang, Yue Cao, Xiangdong Gao, Ximing Xu and Jiangnan Yu

      Article first published online: 5 JUN 2013 | DOI: 10.1002/adfm.201203646

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      Calcium phosphate nanoparticles are used as the nonviral vector for the generation of virus-free iPSCs from human umbilical cord mesenchymal stem cells (HUMSCs) via co-delivery of the four Yamanaka factors (Oct4, Sox2, Klf4, and c-Myc). The embryonic stem cell-like iPSCs are competent to express pluripotent markers and differentiate into three germ layers both in vitro and in vivo.

    9. Gold Nanocage-Based Dual Responsive “Caged Metal Chelator” Release System: Noninvasive Remote Control with Near Infrared for Potential Treatment of Alzheimer's Disease (pages 5412–5419)

      Peng Shi, Meng Li, Jinsong Ren and Xiaogang Qu

      Article first published online: 10 JUN 2013 | DOI: 10.1002/adfm.201301015

      Thumbnail image of graphical abstract

      A noninvasive remote controlled drug delivery system based on gold nanocage to realize the dual-responsive enhanced metal-ion chelator release for Alzheimer's disease therapy is reported. Through remote control with near IR light, the new design allows spatial/temporal controlled release of the cargo molecules for higher therapeutic efficacy.

    10. Exciton and Polaron Quenching in Doping-Free Phosphorescent Organic Light-Emitting Diodes from a Pt(II)-Based Fast Phosphor (pages 5420–5428)

      Qi Wang, Iain W. H. Oswald, Michael R. Perez, Huiping Jia, Bruce E. Gnade and Mohammad A. Omary

      Article first published online: 24 MAY 2013 | DOI: 10.1002/adfm.201300699

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      A Pt(II)-based doping-free phosphorescent organic light-emitting diode with an external quantum efficiency of 20.3% and power efficiency of 63.0 lm W−1 is demonstrated. The device efficiency roll-off at high current densities is assessed quantitatively by deriving the triplet-triplet annihilation and triplet-polaron quenching rate constants. The contributions from loss of charge balance and field-induced exciton dissociation are essentially excluded in this device.

    11. A Self-Standing and Flexible Electrode of Li4Ti5O12 Nanosheets with a N-Doped Carbon Coating for High Rate Lithium Ion Batteries (pages 5429–5435)

      Na Li, Guangmin Zhou, Feng Li, Lei Wen and Hui-Ming Cheng

      Article first published online: 16 MAY 2013 | DOI: 10.1002/adfm.201300495

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      A self-standing and flexible Li4Ti5O12 electrode is assembled via a vacuum filtration process of Li4Ti5O12 nanosheets with N-doped carbon coating. This flexible electrode shows an excellent rate capability and a significantly improved cycling performance.

    12. Self-Limited Nanocrystallization-Mediated Activation of Semiconductor Nanocrystal in an Amorphous Solid (pages 5436–5443)

      Shifeng Zhou, Chaoyu Li, Guang Yang, Gang Bi, Beibei Xu, Zhanglian Hong, Kiyotaka Miura, Kazuyuki Hirao and Jianrong Qiu

      Article first published online: 16 MAY 2013 | DOI: 10.1002/adfm.201300969

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      An in situ approach to activate semiconductor nanocrystals (SNCs) mediated by self-limited nanocrystallization of the glassy phase is proposed. The protocol is highly effective for intentionally introducing various cation/anion dopants or their combinations into Ga2O3 SNCs. It offers the possibility of precisely manipulating the photon emission of SNCs to cover the ultraviolet, visible and even near-infrared spectral ranges by simply tuning inert co-dopants.

    13. H-Doped Black Titania with Very High Solar Absorption and Excellent Photocatalysis Enhanced by Localized Surface Plasmon Resonance (pages 5444–5450)

      Zhou Wang, Chongyin Yang, Tianquan Lin, Hao Yin, Ping Chen, Dongyun Wan, Fangfang Xu, Fuqiang Huang, Jianhua Lin, Xiaoming Xie and Mianheng Jiang

      Article first published online: 17 MAY 2013 | DOI: 10.1002/adfm.201300486

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      H-doped black titania with a crystalline core/amorphous shell structure (TiO2@TiO2-xHx) is synthesized by hydrogen plasma. Solar absorption is enhanced due to localized surface plasmon resonance. H doping reduces oxygen vacancies and eliminates the recombination of light-excited electrons and holes. These behaviors enable the black titania to be excellent for water splitting.

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