Advanced Functional Materials

Cover image for Vol. 20 Issue 23

December 8, 2010

Volume 20, Issue 23

Pages 4017–4205

  1. Cover Picture

    1. Top of page
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    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Full Papers
    7. Frontispiece
    8. Full Papers
    1. Edible Electronics: Biocompatible and Biodegradable Materials for Organic Field-Effect Transistors (Adv. Funct. Mater. 23/2010) (page 4017)

      Mihai Irimia-Vladu, Pavel A. Troshin, Melanie Reisinger, Lyuba Shmygleva, Yasin Kanbur, Günther Schwabegger, Marius Bodea, Reinhard Schwödiauer, Alexander Mumyatov, Jeffrey W. Fergus, Vladimir F. Razumov, Helmut Sitter, Niyazi Serdar Sariciftci and Siegfried Bauer

      Version of Record online: 9 DEC 2010 | DOI: 10.1002/adfm.201090104

      Thumbnail image of graphical abstract

      The cover image shows a selection of materials that allow the fabrication of fully biodegradable, even edible organic field-effect transistors. Mihai Irimia-Vladu and co-workers show on page 4069 that substrates made from potato and corn starch, small-molecule dielectrics from various sugars or nucleobases, organic semiconductors based on natural β-carotene, or even food colors may form the basis of sustainable electronics. Design by Georg Wieser, WIEsuell-3D Animation & Multimedia, Linz, Austria.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Full Papers
    7. Frontispiece
    8. Full Papers
    1. Ionic Nanosystems: Large Space-Charge Effects in a Nanostructured Proton Conductor (Adv. Funct. Mater. 23/2010) (page 4018)

      Lucas A. Haverkate, Wing K. Chan and Fokko M. Mulder

      Version of Record online: 9 DEC 2010 | DOI: 10.1002/adfm.201090105

      Thumbnail image of graphical abstract

      The image illustrates the large interfacial space-charge effects occurring in composites of solid acids such as CsHSO4 (blue, negative charge) and TiO2-nanoparticles (red, positive charge). On page 4107 Fokko M. Mulder and co-workers present a space–charge model for large defect concentrations, which reproduces the high proton densities (1021 cm−3) observed in TiO2. The model opens a way to design nanoionic systems for future applications.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Full Papers
    7. Frontispiece
    8. Full Papers
  4. Feature Article

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Feature Article
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    7. Frontispiece
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    1. EXAFS as Powerful Analytical Tool for the Investigation of Organic–Inorganic Hybrid Materials (pages 4026–4047)

      Silvia Gross and Matthias Bauer

      Version of Record online: 15 NOV 2010 | DOI: 10.1002/adfm.201000095

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      X-ray absorption spectroscopy (XAS) can be used as a powerful and versatile tool for structural investigations of organic-inorganic hybrid materials, with a special emphasis on systems consisting of inorganic building block (clusters) embedded into polymer backbones. Examples of potentialities of the method for the short range structural investigation of inorganic nanostructures in hybrids and for the assessment of their structural integrity are reviewed.

  5. Full Papers

    1. Top of page
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    3. Inside Front Cover
    4. Contents
    5. Feature Article
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    7. Frontispiece
    8. Full Papers
    1. Enhanced Photocurrent Production by Photosystem I Multilayer Assemblies (pages 4048–4054)

      Peter N. Ciesielski, Christopher J. Faulkner, Matthew T. Irwin, Justin M. Gregory, Norman H. Tolk, David E. Cliffel and G. Kane Jennings

      Version of Record online: 2 SEP 2010 | DOI: 10.1002/adfm.201001193

      Thumbnail image of graphical abstract

      Multilayer assemblies of Photosystem I formed on various substrates using vacuum-assisted deposition display photocatalytic capabilities when incorporated into an electrochemical system. Akin to the stacked thylakoid structure found in leaves, these multilayer films may be “stacked” by iterative deposition steps to yield films that produce photocurrents orders of magnitude larger than those produced by previously reported monolayer films of Photosystem I.

    2. A Three-Dimensional Nanostructured Array of Protein Nanoparticles (pages 4055–4061)

      Hyuk-Seong Seo, Seong-Eun Kim, Jin-Seung Park, Jong-Hwan Lee, Ki-Yeon Yang, Heon Lee, Kyung Eun Lee, Sung-Sik Han and Jeewon Lee

      Version of Record online: 8 SEP 2010 | DOI: 10.1002/adfm.201001144

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      A well-defined three-dimensional array of proteins is fabricated, which is a patterned array of multilayered protein nanostructures based on alternate layer-by-layer assembly of engineered protein nanoparticles and DNA on a gold dot array. As an example of applications, the three-dimensional nanostructured array was successfully used to detect simultaneously two cancer markers with enhanced sensitivity.

    3. Tailoring the Electrical Properties of Carbon Nanotube–Polymer Composites (pages 4062–4068)

      Yan Y. Huang and Eugene M. Terentjev

      Version of Record online: 8 SEP 2010 | DOI: 10.1002/adfm.201000861

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      The affect of variation in fabrication process on the mechanism of conductivity and dielectric response of carbon-nanotube-dispersed composites within a PDMS matrix is studied. Ultrasonication, shear mixing, and use of surfactants are compared. The fabrication and performance of a stretchable conductor that can be reversibly stretched by over 100% is demonstrated, and other key applications are discussed.

    4. Biocompatible and Biodegradable Materials for Organic Field-Effect Transistors (pages 4069–4076)

      Mihai Irimia-Vladu, Pavel A. Troshin, Melanie Reisinger, Lyuba Shmygleva, Yasin Kanbur, Günther Schwabegger, Marius Bodea, Reinhard Schwödiauer, Alexander Mumyatov, Jeffrey W. Fergus, Vladimir F. Razumov, Helmut Sitter, Niyazi Serdar Sariciftci and Siegfried Bauer

      Version of Record online: 9 SEP 2010 | DOI: 10.1002/adfm.201001031

      Thumbnail image of graphical abstract

      Field-effect transistors fabricated on biodegradable and biocompatible substrates (Ecoflex, hard gelatine, caramelized glucose) from natural or nature-inspired organic dielectrics and semiconductors materials may form the basis of green-electronics.

    5. Flexible Nanosomes (SECosomes) Enable Efficient siRNA Delivery in Cultured Primary Skin Cells and in the Viable Epidermis of Ex Vivo Human Skin (pages 4077–4090)

      Barbara Geusens, Mireille Van Gele, Sien Braat, Stefaan C. De Smedt, Marc C. A. Stuart, Tarl W. Prow, Washington Sanchez, Michael S. Roberts, Niek N. Sanders and Jo Lambert

      Version of Record online: 16 SEP 2010 | DOI: 10.1002/adfm.201000484

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      Skin penetration by high molecular weight molecules like siRNA is possible using extreme flexible nanosomes, called SECosomes. At a depth of 40 μm below the skin surface, fluorescently labeled siRNA/SECosome complexes can be detected inside keratinocytes. Fine morphological details of unstained skin are clearly observable with dark nuclei and a granulated pattern in the cell cytoplasm, presumably originated from NADH accumulated in mitochondria.

    6. Targeting of Cancer Cells Using Quantum Dot–Polypeptide Hybrid Assemblies That Function as Molecular Imaging Agents and Carrier Systems (pages 4091–4097)

      Bayu Atmaja, Bertrand H. Lui, Yuhua Hu, Stayce E. Beck, Curtis W. Frank and Jennifer R. Cochran

      Version of Record online: 14 SEP 2010 | DOI: 10.1002/adfm.201000732

      Thumbnail image of graphical abstract

      Application of quantum dot (QD)–polypeptide assemblies as potential dual imaging and targeted drug-delivery systems. The self-assembly between the QDs (red) and PEGLL- PLL diblock copolypeptide molecules (green) forms a nanoscale assembly that can take the shape of a shell-like structure. Receptor-mediated binding and endocytosis of assemblies modified with cancer-targeting ligands would allow molecular imaging and delivery of loaded drugs to be performed simultaneously.

    7. In-Plane Liquid Crystalline Texture of High-Performance Thienothiophene Copolymer Thin Films (pages 4098–4106)

      Xinran Zhang, Steven D. Hudson, Dean M. DeLongchamp, David J. Gundlach, Martin Heeney and Iain McCulloch

      Version of Record online: 23 SEP 2010 | DOI: 10.1002/adfm.201001232

      Thumbnail image of graphical abstract

      The liquid-crystal-like in-plane microstructure of spin-cast pBTTT-C14 thin films across the length scale of an organic thin film transistor device is revealed by using dark-field transmission electron microscopy and image analysis. It is suggested that the gradual transition of crystal orientation is the primary inter-molecular feature responsible for hole mobility and activation energy.

    8. Large Space-Charge Effects in a Nanostructured Proton Conductor (pages 4107–4116)

      Lucas A. Haverkate, Wing K. Chan and Fokko M. Mulder

      Version of Record online: 3 SEP 2010 | DOI: 10.1002/adfm.201000692

      Thumbnail image of graphical abstract

      Proton insertion from the solid acid CsHSO4 into TiO2 anatase is energetically favorable. It leads to interfacial space-charge effects and conductivity enhancements in nanocomposites. The large proton concentrations (1021 cm−3), caused by a negative formation energy of the ionic defects, are now reproduced by theory and density functional theory calculations.

    9. Combined Use of Synchrotron-Radiation-Based Imaging Techniques for the Characterization of Structured Catalysts (pages 4117–4126)

      Francesco Basile, Patricia Benito, Simone Bugani, Wout De Nolf, Giuseppe Fornasari, Koen Janssens, Luciano Morselli, Erika Scavetta, Domenica Tonelli and Angelo Vaccari

      Version of Record online: 23 SEP 2010 | DOI: 10.1002/adfm.201001004

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      H2-production structured catalysts are synthesized by a novel electrochemical route consisting of the synthesis of hydrotalcite-type compounds on FeCrAlY foams. The characterization of the catalysts is performed for the first time by X-ray fluorescence, X-Ray powder diffraction, and absorption-tomography experiments on the micro- and nanoscales at a synchrotron facility.

    10. Homogeneous and Disordered Assembly of Densely Packed Nanocrystals (pages 4127–4132)

      Yuya Oaki, Takeo Anzai and Hiroaki Imai

      Version of Record online: 15 OCT 2010 | DOI: 10.1002/adfm.201001406

      Thumbnail image of graphical abstract

      Packing any which way: A homogeneous and disordered assembly of densely packed SnO2 and TiO2 nanocrystals 2–3 nm in size forms transparent bulk objects of 2–10 mm without the assistance of any organic molecules (see graphic). The assembly is distinguishable from typical inhomogeneous and disordered aggregates of nanoparticles.

    11. Synthesis, Reductive Cleavage, and Cellular Interaction Studies of Biodegradable, Polyglycerol Nanogels (pages 4133–4138)

      Dirk Steinhilber, Adam L. Sisson, Dorothea Mangoldt, Pia Welker, Kai Licha and Rainer Haag

      Version of Record online: 27 SEP 2010 | DOI: 10.1002/adfm.201000410

      Thumbnail image of graphical abstract

      Biodegradable, functional nanoparticles based on size-defined, disulfide-linked polyglycerol nanogels are a new class of cellular delivery vehicles. Their preparation via miniemulsion polymerization is simple, versatile, and controllable to fine tune material properties. By various methods we reveal how these hydrophilic materials degrade into small fragments in reducing environments. We demonstrate that these materials show little toxicity and rapidly endocytose into cells.

    12. Protein Particles Formed by Protein Activation and Spontaneous Self-Assembly (pages 4139–4144)

      Wing Cheung Mak, Radostina Georgieva, Reinhard Renneberg and Hans Bäumler

      Version of Record online: 24 SEP 2010 | DOI: 10.1002/adfm.201001205

      Thumbnail image of graphical abstract

      Biodegradable and highly homogeneous pure protein particles are fabricated using a facile self-assembly approach. The fabrication of protein particles is based on using internal disulfide bridges within protein molecules as linker to assemble protein molecules into particle form. Protein particles are found to be biodegradable, non-toxic to MDCK cells and with preserved biological activity.

  6. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Full Papers
    7. Frontispiece
    8. Full Papers
    1. Photoluminescence Properties of a Nearly Intrinsic Single InN Nanowire (page 4145)

      Yi-Lu Chang, Zetian Mi and Feng Li

      Version of Record online: 9 DEC 2010 | DOI: 10.1002/adfm.201090107

      Thumbnail image of graphical abstract

      Nearly intrinsic, non-tapered InN nanowires are grown directly on Si(111) substrates by molecular beam epitaxy. The photoluminescence emission of a single InN nanowire exhibits an unprecedentedly narrow (∼13 meV) spectral linewidth, a clear band filling effect with the increase of excitation power, and a significant red shift of the peak energy with increasing temperature.

  7. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Full Papers
    7. Frontispiece
    8. Full Papers
    1. Photoluminescence Properties of a Nearly Intrinsic Single InN Nanowire (pages 4146–4151)

      Yi-Lu Chang, Zetian Mi and Feng Li

      Version of Record online: 27 SEP 2010 | DOI: 10.1002/adfm.201000739

      Thumbnail image of graphical abstract

      Nearly intrinsic, non-tapered InN nanowires are grown directly on Si(111) substrates by molecular beam epitaxy. The photoluminescence emission of a single InN nanowire exhibits an unprecedentedly narrow (∼13 meV) spectral linewidth, a clear band filling effect with the increase of excitation power, and a significant red shift of the peak energy with increasing temperature.

    2. Fluorene-Carbazole Dendrimers: Synthesis, Thermal, Photophysical and Electroluminescent Device Properties (pages 4152–4161)

      Ozlem Usluer, Serafettin Demic, Daniel A. M. Egbe, Eckhard Birckner, Cem Tozlu, Almantas Pivrikas, Alberto Montaigne Ramil and Niyazi Serdar Sariciftci

      Version of Record online: 27 AUG 2010 | DOI: 10.1002/adfm.201001153

      Thumbnail image of graphical abstract

      Novel fluorene-carbazole-thiophene dendrimers are synthesized and tested in OLED devices as HTL materials. They demonstrated amorphous behavior and better HTL characteristics than usual materials such as TPD and NPB with a low turn-on voltage of around 2.5 V and a bright green emission with a maximum luminance of around 25400 cd m−2.

    3. Tailored Remote Photochromic Coloration of in situ Synthesized CdS Quantum Dot Loaded WO3 Films (pages 4162–4167)

      Zhi-Gang Zhao, Zhi-Fu Liu and Masahiro Miyauchi

      Version of Record online: 27 AUG 2010 | DOI: 10.1002/adfm.201001198

      Thumbnail image of graphical abstract

      CdS quantum dot (QD) loaded WO3 films (see HRTEM image) are shown to have an efficient visible-light-driven photochromic response. One striking feature of such a photochromic system is its remote photochromic characteristic. The decoloration time for CdS QD loaded WO3 films is found to be significantly shorter than that for bare WO3 films, probably as a result of their different electron-trapping processes.

    4. Sustained Release of a Monoclonal Antibody from Electrochemically Prepared Mesoporous Silicon Oxide (pages 4168–4174)

      Jennifer S. Andrew, Emily J. Anglin, Elizabeth C. Wu, Michelle Y. Chen, Lingyun Cheng, William R. Freeman and Michael J. Sailor

      Version of Record online: 7 SEP 2010 | DOI: 10.1002/adfm.201000907

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      The monoclonal antibody bevacizumab (Avastin) is concentrated within the nanoscale pores of electrochemically prepared porous silica by factors as large as 470 due to electrostatic interactions between the antibody and the negatively charged porous SiO2 matrix. Nearly linear release of the antibody in its functional form is maintained for a period of 30 days.

      Corrected by:

      Correction: Correction: Sustained Release of a Monoclonal Antibody from Electrochemically Prepared Mesoporous Silicon Oxide

      Vol. 21, Issue 23, 4410, Version of Record online: 30 NOV 2011

    5. Self-Assembling TiO2 Nanorods on Large Graphene Oxide Sheets at a Two-Phase Interface and Their Anti-Recombination in Photocatalytic Applications (pages 4175–4181)

      Jincheng Liu, Hongwei Bai, Yinjie Wang, Zhaoyang Liu, Xiwang Zhang and Darren Delai Sun

      Version of Record online: 7 SEP 2010 | DOI: 10.1002/adfm.201001391

      Thumbnail image of graphical abstract

      Graphene oxide–TiO2 nanorod composites are produced using a two-phase interface self-assembly procedure. The effective charge transfer from TiO2 nanorods to graphene oxide (GO), the effective absorption of methylene blue by GO, and the effective reduction of GO are demonstrated during photocatalytic process. The photocatalytic activity for the degradation of methylene blue under UV light irradiation is significantly increased.

    6. Hybrids of Magnetic Nanoparticles with Double-Hydrophilic Core/Shell Cylindrical Polymer Brushes and Their Alignment in a Magnetic Field (pages 4182–4189)

      Youyong Xu, Jiayin Yuan, Bing Fang, Markus Drechsler, Markus Müllner, Sreenath Bolisetty, Matthias Ballauff and Axel H. E. Müller

      Version of Record online: 7 SEP 2010 | DOI: 10.1002/adfm.201000769

      Thumbnail image of graphical abstract

      Preformed magnetite nanoparticles are introduced into the core of double-hydrophilic core-shell cylindrical polymer brushes to form magnetic hybrid nanocylinders. These can be successfully aligned by relatively weak magnetic fields over large areas when deposited on a substrate.

    7. Synthesis of Homogeneously Alloyed Cu2−x(SySe1−y) Nanowire Bundles with Tunable Compositions and Bandgaps (pages 4190–4195)

      Jun Xu, Yong-Bing Tang, Xue Chen, Chun-Yan Luan, Wen-Feng Zhang, Juan Antonio Zapien, Wen-Jun Zhang, Hoi-Lun Kwong, Xiang-Min Meng, Shuit-Tong Lee and Chun-Sing Lee

      Version of Record online: 8 SEP 2010 | DOI: 10.1002/adfm.201000771

      Thumbnail image of graphical abstract

      Bundles of homogeneously alloyed Cu2−x(SySe1−y) nanowires with lengths of several hundreds of micrometers and diameters of 200−500 nm are controllably prepared over the entire composition range of y (0 ≤ y ≤ 1). The trends of lattice parameter and bandgap variations with composition are in consistent with those described by Végard's Law.

    8. The Contribution of DOPA to Substrate–Peptide Adhesion and Internal Cohesion of Mussel-Inspired Synthetic Peptide Films (pages 4196–4205)

      Travers H. Anderson, Jing Yu, Abril Estrada, Malte U. Hammer, J. Herbert Waite and Jacob N. Israelachvili

      Version of Record online: 9 NOV 2010 | DOI: 10.1002/adfm.201000932

      Thumbnail image of graphical abstract

      Synthetic polypeptide analogues of adhesive mussel foot proteins are used to study the role of dihydroxyphenylalanine (DOPA) in adhesion using the surface forces apparatus. Shown is an illustration of the proposed binding mechanism of DOPA to TiO2 and mica surfaces.

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