Advanced Materials

Cover image for Vol. 23 Issue 21

June 3, 2011

Volume 23, Issue 21

Pages 2387–2496

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Review
    6. Communications
    1. Solution-Processed Ambient Electronics: All-Solution-Processed, High-Performance n-Channel Organic Transistors and Circuits: Toward Low-Cost Ambient Electronics (Adv. Mater. 21/2011) (page 2387)

      Yan Zhao, Chong-an Di, Xike Gao, Yunbin Hu, Yunlong Guo, Lei Zhang, Yunqi Liu, Jizheng Wang, Wenping Hu and Daoben Zhu

      Article first published online: 30 MAY 2011 | DOI: 10.1002/adma.201190076

      Thumbnail image of graphical abstract

      Construction of high-performance, low-cost, and flexible n-type organic transistors with robust stability is a critical challenge in organic electronics. Chong-an Di and co-workers demonstrate on p. 2448 all-solution-processed circuits with powerful performance and excellent ambient stability based on flexible n-channel transistors. The cover image shows the ultralow-cost construction of organic paper-like circuits from drops of functional materials under ambient conditions, which constitutes a unique advantage of organic devices with inorganic counterpart.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Review
    6. Communications
    1. Jet Engine Coatings: Jet Engine Coatings for Resisting Volcanic Ash Damage (Adv. Mater. 21/2011) (page 2388)

      Julie M. Drexler, Andrew D. Gledhill, Kentaro Shinoda, Alexander L. Vasiliev, Kongara M. Reddy, Sanjay Sampath and Nitin P. Padture

      Article first published online: 30 MAY 2011 | DOI: 10.1002/adma.201190077

      Thumbnail image of graphical abstract

      Volcanic ash ingested by jet engines can damage conventional Y2O3-stablized ZrO2 thermal barrier coatings (TBCs) used to protect engine parts in the hot section. Newer TBCs, one based on Gd2Zr2O7 and another composed of ZrO2 solid solution containing Y2O3, Al2O3 and TiO2, are shown to be highly resistant to such damage from Eyjafjallajökull volcano ash by Nitin P. Padture and co-workers on p. 2419. Cover photo of the Eyjafjallajökull volcano eruption provided by Peter Greenfield, who took the image from an airplane on May 6th, 2010.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Review
    6. Communications
    1. Contents: (Adv. Mater. 21/2011) (pages 2389–2394)

      Article first published online: 30 MAY 2011 | DOI: 10.1002/adma.201190078

  4. Review

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Review
    6. Communications
    1. Mesoporous Structures Confined in Anodic Alumina Membranes (pages 2395–2412)

      Barbara Platschek, Andreas Keilbach and Thomas Bein

      Article first published online: 12 APR 2011 | DOI: 10.1002/adma.201002828

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      Nanoporous membranes with ordered morphology are of interest for potential applications in various fields of nanoscience, including the templated synthesis of oriented nanowires, or the controlled separation and release of molecules. This review focuses on the synthesis strategies, mesophase evolution mechanisms and potential applications of mesoporous materials (e.g., silica, titania, and carbon) confined within anodic alumina membranes (AAM).

  5. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Review
    6. Communications
    1. Reconfigurable Self-Assembly of Mesoscale Optical Components at a Liquid–Liquid Interface (pages 2413–2418)

      Sindy K.Y. Tang, Ratmir Derda, Aaron D. Mazzeo and George M. Whitesides

      Article first published online: 14 APR 2011 | DOI: 10.1002/adma.201100067

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      Magnetic fields template the self-assembly of 2D mesoscale optical components consisting of magnetically responsive parts at a liquid–liquid interface. These optical components are tiles of reflective diffraction gratings. Their orientations, and the resulting optical effects, are reconfigurable by a change in the magnetic field. Transferring the assembled structure onto solid substrates generates optically functional coatings or films.

    2. Jet Engine Coatings for Resisting Volcanic Ash Damage (pages 2419–2424)

      Julie M. Drexler, Andrew D. Gledhill, Kentaro Shinoda, Alexander L. Vasiliev, Kongara M. Reddy, Sanjay Sampath and Nitin P. Padture

      Article first published online: 8 APR 2011 | DOI: 10.1002/adma.201004783

      Thumbnail image of graphical abstract

      Volcanic ash ingested by jet engines can damage conventional Y2O3-stablized ZrO2 thermal barrier coatings (TBCs) used to protect engine parts in the hot section. Newer TBCs, one based on Gd2Zr2O7 and another composed of ZrO2 solid solution containing Y2O3, Al2O3, and TiO2, are found to be highly resistant to such damage from Eyjafjallajökull volcano ash. Photo courtesy of Peter Greenfield.

    3. Two-Photon 3D Optical Data Storage via Aggregate Switching of Excimer-Forming Dyes (pages 2425–2429)

      Joseph Lott, Christopher Ryan, Brent Valle, Jack R. Johnson III, David A. Schiraldi, Jie Shan, Kenneth D. Singer and Christoph Weder

      Article first published online: 12 APR 2011 | DOI: 10.1002/adma.201100458

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      A novel optical data storage (ODS) system that relies on the optically-induced switching of the aggregation state and fluorescence of a two-photon absorption dye in a polymer matrix is reported. Well-defined, ∼3 × 3 × 6 μm large voxels are written with single focused laser pulses and read by confocal laser scanning microscopy.

    4. End-Capping Effect of a Narrow Bandgap Conjugated Polymer on Bulk Heterojunction Solar Cells (pages 2430–2435)

      Jin Kuen Park, Jang Jo, Jung Hwa Seo, Ji Sun Moon, Yeong Don Park, Kwanghee Lee, Alan J. Heeger and Guillermo C. Bazan

      Article first published online: 20 APR 2011 | DOI: 10.1002/adma.201004629

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      Device performances of BHJ solar cells based on poly[(4,4-didodecyldithieno[3,2-b:2’,3’-d]silole)-2,6-diyl-alt-(2,1,3-benzoxadiazole)-4,7-diyl]and PC71BM improve by capping the chain ends with thiophene fragments. This structural modification yields materials that are more thermally robust and that can be used in devices with thicker films – important considerations for enabling the mass production of plastic solar cells.

    5. pH-Triggered Drug-Releasing Magnetic Nanoparticles for Cancer Therapy Guided by Molecular Imaging by MRI (pages 2436–2442)

      Eun-Kyung Lim, Yong-Min Huh, Jaemoon Yang, Kwangyeol Lee, Jin-Suck Suh and Seungjoo Haam

      Article first published online: 14 APR 2011 | DOI: 10.1002/adma.201100351

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      pH-sensitive drug-delivering magnetic nanoparticles (DMNPs) have been developed as theragnostic nanocarriers that release doxorubicin (DOX) under acidic conditions within cancer cells. The drug release kinetics of the DMNPs, combined with the nanoparticle accumulation pattern in tumor cells, can be monitored by magnetic resonance imaging (MRI) to guide decisions regarding the optimization of drug dosing schedules.

    6. Li Storage in 3D Nanoporous Au-Supported Nanocrystalline Tin (pages 2443–2447)

      Yan Yu, Lin Gu, Xingyou Lang, Changbao Zhu, Takeshi Fujita, MingWei Chen and Joachim Maier

      Article first published online: 12 APR 2011 | DOI: 10.1002/adma.201004331

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      3D nanoporous Au-supported nano­crystalline tin thin-film anodes for Li-ion batteries are prepared by dealloying followed by electroless plating. When used as an electrode for Li-ion batteries, this special Sn structure can effectively accommodate large volume variations during cycling in a lithium cell, resulting in improved capacity retention.

    7. All-Solution-Processed, High-Performance n-Channel Organic Transistors and Circuits: Toward Low-Cost Ambient Electronics (pages 2448–2453)

      Yan Zhao, Chong-an Di, Xike Gao, Yunbin Hu, Yunlong Guo, Lei Zhang, Yunqi Liu, Jizheng Wang, Wenping Hu and Daoben Zhu

      Article first published online: 11 MAR 2011 | DOI: 10.1002/adma.201004588

      Thumbnail image of graphical abstract

      Exploration of high-performance solution-processed n-channel organic transistors with excellent stability is a critical issue for the development of powerful printed circuits. Solution-processed, bottom-gate transistors exhibiting a record electron mobility of up to 1.2 cm2 V−1 s−1 are reported. The devices show excellent stability, which enables the construction of all-solution-processed flexible circuits with all fabrication procedures performed in air.

    8. Nanoparticle-Enabled Selective Electrodeposition (pages 2454–2459)

      Hsien-Ping Feng, Trilochan Paudel, Bo Yu, Shuo Chen, Zhi Feng Ren and Gang Chen

      Article first published online: 3 MAY 2011 | DOI: 10.1002/adma.201004656

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      Electrodeposition of a material onto a conducting substrate with strong adhesion and exceptional uniformity through the use of platinum nanoparticles as the seed layer is reported. The use of platinum nanoparticles also creates an optimum voltage range to selectively electroplate various metals on substrate into areas seeded with the nanoparticles.

    9. Production of High-Quality Carbon Nanoscrolls with Microwave Spark Assistance in Liquid Nitrogen (pages 2460–2463)

      Jian Zheng, Hongtao Liu, Bin Wu, Yunlong Guo, Ti Wu, Gui Yu, Yunqi Liu and Daoben Zhu

      Article first published online: 8 APR 2011 | DOI: 10.1002/adma.201004759

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      A simple method to fabricate high quality carbon nanoscrolls (CNSs) by exfoliation of natural flake graphite with the assistance of microwave sparks in liquid nitrogen is demonstrated. Field-effect transistors based on the CNSs show stable ambipolar behavior in both air and nitrogen, with maximum p-type and n-type mobilities in nitrogen of up to 3117 cm2 V−1 s−1 and 4595 cm2 V−1 s−1, respectively.

    10. High-Performance Graphene Devices on SiO2/Si Substrate Modified by Highly Ordered Self-Assembled Monolayers (pages 2464–2468)

      Xiaomu Wang, Jian-Bin Xu, Chengliang Wang, Jun Du and Weiguang Xie

      Article first published online: 12 APR 2011 | DOI: 10.1002/adma.201100476

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      A SiO2/Si substrate modified by an octadecyltrimethoxysilane (OTMS) self-assembled monolayer is used to obtain high-quality graphene devices with low intrinsic doping level. The carrier mobility can reach 47 000 cm2 V−1 s−1. The findings will pave the way for approaching the intrinsic properties of supported graphene, elucidating the scattering origins, and gaining a better understanding of the mechanism of carrier transport in graphene.

    11. A New Architecture for Transparent Electrodes: Relieving the Trade-Off Between Electrical Conductivity and Optical Transmittance (pages 2469–2473)

      Ping Kuang, Joong-Mok Park, Wai Leung, Rakesh C. Mahadevapuram, Kanwar S. Nalwa, Tae-Geun Kim, Sumit Chaudhary, Kai-Ming Ho and Kristen Constant

      Article first published online: 26 APR 2011 | DOI: 10.1002/adma.201100419

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      A novel architecture with high-aspect-ratio nanoscale metallic periodic patterns is fabricated as transparent electrodes. The structure shows high visible light transmission and has superior electrical conductivity compared to standard indium tin oxide (ITO) coated glass. A proof-of-principle organic photovoltaic device is successfully fabricated with the electrode.

    12. Atomically Resolved Mapping of Polarization and Electric Fields Across Ferroelectric/Oxide Interfaces by Z-contrast Imaging (pages 2474–2479)

      Hye Jung Chang, Sergei V. Kalinin, Anna N. Morozovska, Mark Huijben, Ying-Hao Chu, Pu Yu, Ramamoorthy Ramesh, Evgeny A. Eliseev, George S. Svechnikov, Stephen J. Pennycook and Albina Y. Borisevich

      Article first published online: 29 APR 2011 | DOI: 10.1002/adma.201004641

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      Direct atomic displacement mapping at ferroelectric interfaces by aberration corrected scanning transmission electron microscopy(STEM) (a-STEM image, b-corresponding displacement profile) is combined with Landau-Ginsburg-Devonshire theory to obtain the complete interface electrostatics in real space, including separate estimates for the polarization and intrinsic interface charge contributions.

    13. High-Performance, Anode-Supported, Microtubular SOFC Prepared from Single-Step-Fabricated, Dual-Layer Hollow Fibers (pages 2480–2483)

      Mohd Hafiz Dzarfan Othman, Nicolas Droushiotis, Zhentao Wu, Geoff Kelsall and Kang Li

      Article first published online: 12 APR 2011 | DOI: 10.1002/adma.201100194

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      A high-performance, microtubular solid oxide fuel cell is developed using an improved electrolyte/anode dual-layer hollow fiber fabricated via a novel coextrusion and co-sintering technique. The technique allows control over the porosity of the anode, resulting in an increase in the power output to almost double what has been previously reported.

    14. Enhancement of the Thermoelectric Performance of p-Type Layered Oxide Ca3Co4O9+δ Through Heavy Doping and Metallic Nanoinclusions (pages 2484–2490)

      Ngo Van Nong, Nini Pryds, Søren Linderoth and Michitaka Ohtaki

      Article first published online: 26 APR 2011 | DOI: 10.1002/adma.201004782

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      An effective way to improve the thermoelectric performance (ZT) of layered structured oxide materials by carefully choosing heavy ion doping and introducing metallic nanoinclusions is proposed. A p-type oxide material with remarkable highly improved ZT is successfully fabricated using this approach. Long-term durability at high temperature testing confirms this material is a very promising p-type material for high temperature power generation.

    15. A Single Phosphine Oxide Host for High-Efficiency White Organic Light-Emitting Diodes with Extremely Low Operating Voltages and Reduced Efficiency Roll-Off (pages 2491–2496)

      Chunmiao Han, Guohua Xie, Hui Xu, Zhensong Zhang, Linghai Xie, Yi Zhao, Shiyong Liu and Wei Huang

      Article first published online: 21 APR 2011 | DOI: 10.1002/adma.201100322

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      Highly efficient white organic light-emitting diodes (WOLEDs) with a simple, single-host-based structure are fabricated to realize the state-of-the-art performance of extremely low driving voltages, high efficiencies, and low efficiency roll-offs. This is the first single-host-based WOLED with both high efficiency and extremely low operating voltage at practical luminescence, demonstrating the great potential of these WOLEDs for portable display and lighting applications.

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