Advanced Functional Materials

Cover image for Vol. 20 Issue 9

May 10, 2010

Volume 20, Issue 9

Pages 1363–1520

  1. Cover Picture

    1. Top of page
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    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Frontispiece
    7. Full Papers
    8. Correction
    9. Retraction
    1. Bionanotechnology: Enhancement of Aggregation-Induced Emission in Dye-Encapsulating Polymeric Micelles for Bioimaging (Adv. Funct. Mater. 9/2010)

      Wen-Chung Wu, Ching-Yi Chen, Yanqing Tian, Sei-Hum Jang, Yuning Hong, Yang Liu, Rongrong Hu, Ben Zhong Tang, Yi-Ting Lee, Chin-Ti Chen, Wen-Chang Chen and Alex K.-Y. Jen

      Article first published online: 28 APR 2010 | DOI: 10.1002/adfm.201090032

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      Amphiphilic block copolymers can form polymer micelles for delivering hydrophobic fluorescent probes with aggregation-induced emission properties, as presented by A. K.-Y. Jen et al. on page 1413. By itself, 1,1,2,3,4,5-hexaphenylsilole (HPS) exhibits dramatically enhanced blue-green fluorescent emission efficiencies when encapsulated within the hydrophobic core of a polymeric micelle. When HPS is co-encapsulated with bis(4-(N-(1-naphthyl) phenylamino)-phenyl)fumaronitrile, effective orange-red fluorescence resonance energy transfer can be demonstrated within live RAW 264.7 cells. Illustration provided by Brent Polishak.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Frontispiece
    7. Full Papers
    8. Correction
    9. Retraction
    1. Microstructures: Facile Fabrication of Monolithic 3D Porous Silica Microstructures and a Microfluidic System Embedded with the Microstructure (Adv. Funct. Mater. 9/2010)

      ZuoYi Xiao, Anjie Wang, Jayakumar Perumal and Dong-Pyo Kim

      Article first published online: 28 APR 2010 | DOI: 10.1002/adfm.201090033

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      D.-P. Kim and co-workers present the fabrication of monolithic 3D porous silica structures into a multilayer framework with bimodal pore size distribution on page 1473. The structure becomes monolithic upon pyrolyzing the stacked layers, and then easily embedded in microchannel with the aid of photolithography, leading to a microfluidic system with built-in microstructure in a site- and shape-controlled manner.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Frontispiece
    7. Full Papers
    8. Correction
    9. Retraction
    1. Contents: (Adv. Funct. Mater. 9/2010) (pages 1363–1368)

      Article first published online: 28 APR 2010 | DOI: 10.1002/adfm.201090034

  4. Feature Article

    1. Top of page
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    3. Inside Front Cover
    4. Contents
    5. Feature Article
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    8. Correction
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    1. Interface Engineering for Organic Electronics (pages 1371–1388)

      Hong Ma, Hin-Lap Yip, Fei Huang and Alex K.-Y. Jen

      Article first published online: 7 APR 2010 | DOI: 10.1002/adfm.200902236

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      The strategies of utilizing surfactant-modified cathodes, hole-transporting buffer layers, and self-assembled-monolayer (SAM)-modified anodes for high-efficiency organic light-emitting diodes (OLEDs) are highlighted. Controlling the interfaces of conventional and inverted polymer solar cells (PSCs) are also shown to enhance efficiency and stability, while tailoring source–drain electrode–semiconductor interfaces, dielectric–semiconductor interfaces, and ultrathin dielectrics allow for high-performance organic field-effect transistors (OFETs).

  5. Frontispiece

    1. Top of page
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    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Frontispiece
    7. Full Papers
    8. Correction
    9. Retraction
    1. Nanotube Arrays: Template-Directed Liquid ALD Growth of TiO2 Nanotube Arrays: Properties and Potential in Photovoltaic Devices (Adv. Funct. Mater. 9/2010)

      Thelese R. B. Foong, Yaodong Shen, Xiao Hu and Alan Sellinger

      Article first published online: 28 APR 2010 | DOI: 10.1002/adfm.201090035

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      X. Hu, A. Sellinger, et al. present on page 1390 an array of TiO2 nanotubes prepared via a new liquid atomic layer deposition process in porous anodic alumina templates. The ability to reproduce the arrays on various types of substrates including Si and transparent conducting oxides opens opportunities in many exciting opto-electronic applications. The potential of such arrays in ordered bulk-heterojunction solar cells is explored.

  6. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Frontispiece
    7. Full Papers
    8. Correction
    9. Retraction
    1. Template-Directed Liquid ALD Growth of TiO2 Nanotube Arrays: Properties and Potential in Photovoltaic Devices (pages 1390–1396)

      Thelese R. B. Foong, Yaodong Shen, Xiao Hu and Alan Sellinger

      Article first published online: 11 MAR 2010 | DOI: 10.1002/adfm.200902063

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      Well-aligned and well-spaced arrays of TiO2 nanotubes are fabricated via a new liquid atomic-layer-deposition (ALD) process in anodic alumina (AAO) templates prepared on various substrates. The high-resolution transmission electron microscopy (HR-TEM) lattice fringes suggest a single-crystal-like structure, which is one of the key attributes of liquid ALD that is unachievable using sol–gel processes.

    2. Effect of the Molecular Size of Analytes on Polydiacetylene Chromism (pages 1397–1403)

      Donghwan Seo and Jinsang Kim

      Article first published online: 1 APR 2010 | DOI: 10.1002/adfm.201000262

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      pH chromism of amine-functionalized polydiacetylene is examined based on the molecular size of acid analytes. The analysis of polydiacetylene liposomes by UV-Vis and photoluminescence spectroscopy reveals the effects of pH, molecular size, and alkyl spacer on polydiacetylene chromism. The application of polydiacetylene sensors for the detection of degraded nerve agent is proposed based on these new findings.

    3. Glucose-Responsive Bioinorganic Nanohybrid Membrane for Self-Regulated Insulin Release (pages 1404–1412)

      Claudia R. Gordijo, Adam J. Shuhendler and Xiao Yu Wu

      Article first published online: 15 MAR 2010 | DOI: 10.1002/adfm.200901581

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      Bioinspired glucose-responsive materials have opened new avenues in the development of self-regulated insulin delivery systems. Glucose-sensitive nanocomposite membranes that combine glucose sensing and triggered insulin release in an all-in-one system holds great promise for a better treatment of diabetes. A novel bioinorganic hybrid material showing a cooperative interplay between bio-organic and inorganic counterparts is reported.

    4. Enhancement of Aggregation-Induced Emission in Dye-Encapsulating Polymeric Micelles for Bioimaging (pages 1413–1423)

      Wen-Chung Wu, Ching-Yi Chen, Yanqing Tian, Sei-Hum Jang, Yuning Hong, Yang Liu, Rongrong Hu, Ben Zhong Tang, Yi-Ting Lee, Chin-Ti Chen, Wen-Chang Chen and Alex K.-Y. Jen

      Article first published online: 17 MAR 2010 | DOI: 10.1002/adfm.200902043

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      Highly efficient fluorescence probes are achieved through the encapsulation of aggregation-induced emission molecules, 1,1,2,3,4,5-hexaphenylsilole (HPS) and/or bis(4-(N-(1-naphthyl) phenylamino)-phenyl)fumaronitrile (NPAFN) in the core of polymeric micelles. Bright fluorescence cell images are shown with tunable colors of green directly from HPS aggregates and red through efficient fluorescence resonance energy transfer (FRET) from HPS aggregates to NPAFN aggregates.

    5. Preparation of High-Performance Conductive Polymer Fibers through Morphological Control of Networks Formed by Nanofillers (pages 1424–1432)

      Hua Deng, Tetyana Skipa, Emiliano Bilotti, Rui Zhang, Dirk Lellinger, Luca Mezzo, Qiang Fu, Ingo Alig and Ton Peijs

      Article first published online: 6 APR 2010 | DOI: 10.1002/adfm.200902207

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      The morphological and electrical changes of highly oriented conductive nanofiller networks in conductive polymer composite (CPC) bicomponent tapes during relaxation, melting, and crystallization of the polymer matrix are reported for the first time. To the best of the authors' knowledge, the polymer fiber manufactured here is the most conductive (∼275 S m−1) high-strength polymer/multiwalled carbon nanotube (MWNT) nanocomposite fiber produced by melt-processing so far.

    6. Nanofibrous Patches for Spinal Cord Regeneration (pages 1433–1440)

      Yiqian Zhu, Aijun Wang, Wenqian Shen, Shyam Patel, Rong Zhang, William L. Young and Song Li

      Article first published online: 17 MAR 2010 | DOI: 10.1002/adfm.200901889

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      An electrospun nanofibrous scaffold is used as a patch to bridge the gap resulting from a hemisection injury of the spinal cord. The scaffold has aligned nanofibers on the luminal surface for the guidance of axon growth. Rolipram, a small molecule that can suppress inflammatory responses and promote axon growth, is loaded into nanofibrous scaffolds and released gradually. The nanofibrous scaffolds with rolipram result in spinal cord regeneration.

    7. Interplay of Properties and Functions upon Introduction of Mesoporosity in ITQ-4 Zeolite (pages 1441–1450)

      Danny Verboekend, Johan C. Groen and Javier Pérez-Ramírez

      Article first published online: 25 MAR 2010 | DOI: 10.1002/adfm.200902205

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      An integrated approach for studying property–function relationships in hierarchical zeolites is presented. Along with porosity modification, upon desilication post-treatment significant changes in composition, structure, acidity, and accessibility of 1D ITQ-4 occur. Relationships are established between the physicochemical properties of the zeolites and their characteristics in the adsorption and elution of light hydrocarbons, as well as in the catalytic activity in LDPE pyrolysis.

    8. Conductive Nanostructures of MMX Chains (pages 1451–1457)

      Alejandro Guijarro, Oscar Castillo, Lorena Welte, Arrigo Calzolari, Pablo J. Sanz Miguel, Carlos J. Gómez-García, David Olea, Rosa di Felice, Julio Gómez-Herrero and Felix Zamora

      Article first published online: 31 MAR 2010 | DOI: 10.1002/adfm.200901901

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      [Pt2(RCS2)4I] (R = alkyl) polymers show metallic electrical conductivity in the crystal phases. A Pt-based MMX that shows phase transitions with the temperature is presented and a novel charge-ordering state is disclosed. The polymer is finally adsorbed on an insulating surface to form conducting nanostructures. The results suggest MMX chains as candidates for molecular wires.

    9. P3HT/PCBM Bulk Heterojunction Solar Cells: Impact of Blend Composition and 3D Morphology on Device Performance (pages 1458–1463)

      Svetlana S. van Bavel, Maik Bärenklau, Gijsbertus de With, Harald Hoppe and Joachim Loos

      Article first published online: 7 APR 2010 | DOI: 10.1002/adfm.200902247

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      As-cast and annealed P3HT/PCBM layers with different blend compositions are characterized by a number of techniques, including electron tomography and photoluminescence spectroscopy. The 3D morphological information, that is, the distribution of crystalline poly(3-hexylthiophene) (P3HT) nanowires thoughout the P3HT/[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) film, is correlated with the performance of corresponding polymer solar cells.

    10. A CdSe Nanowire/Quantum Dot Hybrid Architecture for Improving Solar Cell Performance (pages 1464–1472)

      Yanghai Yu, Prashant V. Kamat and Masaru Kuno

      Article first published online: 22 MAR 2010 | DOI: 10.1002/adfm.200902372

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      Preliminary CdSe nanowire-based photoelectrochemical solar cells are made wherein incident photon-to-current as well as power conversion efficiencies nearly double upon addition of CdSe quantum dots (QD) to the nanowire (NW) network. The effect likely stems from the interplay between NWs and QDs since the latter fill voids within the wire network, providing additional pathways for carrier transport to electrodes.

    11. Facile Fabrication of Monolithic 3D Porous Silica Microstructures and a Microfluidic System Embedded with the Microstructure (pages 1473–1479)

      ZuoYi Xiao, Anjie Wang, Jayakumar Perumal and Dong-Pyo Kim

      Article first published online: 23 MAR 2010 | DOI: 10.1002/adfm.200902164

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      Monolithic 3D porous silica microstructures with bimodal pore size distribution are successfully fabricated. Necking the silica beads at the pyrolytic step yields a robust and mechanically stable microstructure over an area of 10 cm2. This 3D microstructure is easily embedded into microchannels via a photolithographic technique, leading to a good improvement in the mixing performance of the channels.

    12. Effect of Carbon Chain Length in the Substituent of PCBM-like Molecules on Their Photovoltaic Properties (pages 1480–1487)

      Guangjin Zhao, Youjun He, Zheng Xu, Jianhui Hou, Maojie Zhang, Jie Min, Hsiang-Yu Chen, Mingfu Ye, Ziruo Hong, Yang Yang and Yongfang Li

      Article first published online: 1 APR 2010 | DOI: 10.1002/adfm.200902447

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      A series of PCBM-like fullerene derivatives, F1–F5, are synthesized to investigate the relationship between photovoltaic properties and the molecular structure of the fullerene derivative acceptors. F2 with a butyl chain is PCBM itself for comparison. The photovoltaic behavior of P3HT/F1 and P3HT/F4 polymer solar cell systems are similar to or slightly better than that of the P3HT/PCBM device, while the performances of the P3HT/F3 and P3HT/F5 systems were poorer.

    13. Bottom-Up Synthesis of Biologically Active Multilayer Films Using Inkjet-Printed Templates (pages 1488–1492)

      Joshua D. Swartz, Leila F. Deravi and David W. Wright

      Article first published online: 25 MAR 2010 | DOI: 10.1002/adfm.200902169

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      Localizing the enzyme GOx to a 2D-patterned surface not only minimizes the amount of reactants used during the study, but also provides a stable and reusable template that could serve a variety of functions, including biosensing and catalysis on a larger scale.

    14. Growth and Transfer of Monolithic Horizontal ZnO Nanowire Superstructures onto Flexible Substrates (pages 1493–1497)

      Sheng Xu, Yue Shen, Yong Ding and Zhong Lin Wang

      Article first published online: 25 MAR 2010 | DOI: 10.1002/adfm.201000230

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      A method of fabricating horizontally aligned ZnO nanowire (NW) arrays with full control over the width and length is demonstrated. A cross-sectional view of the NWs shows a “mushroom-like” structure. Novel monolithic multisegment superstructures are fabricated by making use of the lateral overgrowth. Ultralong horizontal ZnO NWs of an aspect ratio on the order of ten thousand are also demonstrated.

    15. Solar Energy Collectors with Tunable Transmission (pages 1498–1502)

      Michael G. Debije

      Article first published online: 18 MAR 2010 | DOI: 10.1002/adfm.200902403

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      A new “smart” window design based on a fluorescent guest/liquid-crystal host is introduced, which may be externally modulated to vary light transmission while simultaneously generating electricity via an attached photovoltaic cell. Shown in the photograph are two filled cells in the “off” (left) and “on” states (right).

    16. Fabrication and Drug Delivery of Ultrathin Mesoporous Bioactive Glass Hollow Fibers (pages 1503–1510)

      Youliang Hong, Xuesi Chen, Xiabin Jing, Hongsong Fan, Zhongwei Gu and Xingdong Zhang

      Article first published online: 1 APR 2010 | DOI: 10.1002/adfm.200901627

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      Ultrathin mesoporous bioactive glass hollow fibers (MBGHFs) are fabricated using an electrospinning technique and combining the phase-separation-inducing agent poly(ethylene oxide). The fabricated MBGHFs have good bioactivity and can become excellent carriers for drug delivery.

    17. Efficient and Long-Living Light-Emitting Electrochemical Cells (pages 1511–1520)

      Rubén D. Costa, Enrique Ortí, Henk J. Bolink, Stefan Graber, Catherine E. Housecroft and Edwin C. Constable

      Article first published online: 7 APR 2010 | DOI: 10.1002/adfm.201000043

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      Efficient and stable materials. Supramolecularly caged cationic iridium(III) complexes yield increasingly efficient and stable solid-state light-emitting electrochemical cells when bulky substituents are incorporated.

  7. Correction

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Frontispiece
    7. Full Papers
    8. Correction
    9. Retraction
    1. You have free access to this content
      Correction: High-Resolution Patterning of Hydrogels in Three Dimensions using Direct-Write Photofabrication for Cell Guidance

      Stephanie K. Seidlits, Christine E. Schmidt and Jason B. Shear

      Article first published online: 28 APR 2010 | DOI: 10.1002/adfm.201090036

      This article corrects:
  8. Retraction

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    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Frontispiece
    7. Full Papers
    8. Correction
    9. Retraction
    1. You have free access to this content
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