Advanced Functional Materials

Cover image for Vol. 20 Issue 6

March 24, 2010

Volume 20, Issue 6

Pages 871–1024

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Frontispiece
    7. Full Papers
    8. Frontispiece
    9. Full Papers
    10. Corrections
    1. Engineering Disorder: Engineering Disorder in Superdiffusive Lévy Glasses (Adv. Funct. Mater. 6/2010)

      Jacopo Bertolotti, Kevin Vynck, Lorenzo Pattelli, Pierre Barthelemy, Stefano Lepri and Diederik S. Wiersma

      Article first published online: 22 MAR 2010 | DOI: 10.1002/adfm.201090014

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      Engineering disorder makes it possible to realize materials with advanced optical properties. On page 965, Bertolotti et al. report the recipe for Lévy glasses, strongly inhomogeneous disordered systems displaying superdiffusive light transport. The degree of superdiffusion is fine-tuned by embedding transparent spheres varying in size by orders of magnitude in a scattering medium.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Frontispiece
    7. Full Papers
    8. Frontispiece
    9. Full Papers
    10. Corrections
    1. Vertical Nanostructures: Vertical (La,Sr)MnO3 Nanorods from Track-Etched Polymers Directly Buffering Substrates (Adv. Funct. Mater. 6/2010)

      Adrián Carretero-Genevrier, Jaume Gázquez, Teresa Puig, Narcís Mestres, Felip Sandiumenge, Xavier Obradors and Etienne Ferain

      Article first published online: 22 MAR 2010 | DOI: 10.1002/adfm.201090015

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      The inside cover image shows a tilted SEMFE image of La0.7Sr0.3MnO3 vertical nanorods. A. Carretero-Genevrier and co-workers have established a new method to generate vertical complex oxides nanostructures based on a sol–gel precursor solution and using track-etched polymers that act to buffer the substrate, which is described on page 892. These vertical nanorods grown at mild temperature undergo a complete structural, morphological, and chemical transformation into single crystalline (LaSr)xOy nanopyramids upon thermal activation at 1000°C.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Frontispiece
    7. Full Papers
    8. Frontispiece
    9. Full Papers
    10. Corrections
    1. Contents: (Adv. Funct. Mater. 6/2010) (pages 871–878)

      Article first published online: 22 MAR 2010 | DOI: 10.1002/adfm.201090016

  4. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Frontispiece
    7. Full Papers
    8. Frontispiece
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    10. Corrections
    1. Patterned Synthesis of Pd4S: Chemically Robust Electrodes and Conducting Etch Masks (pages 879–884)

      Boya Radha and Giridhar U. Kulkarni

      Article first published online: 17 FEB 2010 | DOI: 10.1002/adfm.200901766

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      Palladium alkanethiolate acts as a single-source precursor to produce Pd4S films in a simple, single-step method. The films are robust and have special attributes, such as withstanding harsh chemical environments and conducting like a metal. Due to the ability of the precursor to be patterned via electron beam lithography (EBL) and micromolding (MIMIC), the conducting etch masks of Pd4S can be patterned. By suitably modifying the synthesis route, films of Pd16S7 and PdS can also be prepared.

    2. Flexible, Stretchable, Transparent Conducting Films Made from Superaligned Carbon Nanotubes (pages 885–891)

      Chen Feng, Kai Liu, Jeah-Sheng Wu, Liang Liu, Jia-Shyong Cheng, Yuying Zhang, Yinghui Sun, Qunqing Li, Shoushan Fan and Kaili Jiang

      Article first published online: 25 FEB 2010 | DOI: 10.1002/adfm.200901960

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      A roll-to-roll process for fabricating flexible and stretchable transparent conducting films (TCFs) using superaligned carbon nanotubes is demonstrated. Practical touch panels are assembled based on these TCFs, which are superior in flexibility and wearability and comparable in linearity to touch panels based on indium tin oxide TCFs. Combined with obtained improvements in the transparency and sheet resistance of such films, this approach has immediate industrial potential.

    3. Vertical (La,Sr)MnO3 Nanorods from Track-Etched Polymers Directly Buffering Substrates (pages 892–897)

      Adrián Carretero-Genevrier, Jaume Gázquez, Teresa Puig, Narcís Mestres, Felip Sandiumenge, Xavier Obradors and Etienne Ferain

      Article first published online: 16 FEB 2010 | DOI: 10.1002/adfm.200901971

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      A novel version of track-etched polymers directly buffering oxide substrate is adopted to prepare vertical La0.7Sr0.3MnO3 polycrystalline nanorods by chemical-solution deposition. The La0.7Sr0.3MnO3 nanorods suffer a heavy transformation into vertical single-crystalline (La,Sr)xOy nanopyramids sitting on the LSMO epitaxial wetting layer upon thermal activation. This methodology presented here opens this field to the growth of other functional oxide vertical nanostructures.

    4. Dual-Gate Organic Field-Effect Transistors as Potentiometric Sensors in Aqueous Solution (pages 898–905)

      Mark-Jan Spijkman, Jakob J. Brondijk, Tom C. T. Geuns, Edsger C. P. Smits, Tobias Cramer, Francesco Zerbetto, Pablo Stoliar, Fabio Biscarini, Paul W. M. Blom and Dago M. de Leeuw

      Article first published online: 25 FEB 2010 | DOI: 10.1002/adfm.200901830

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      Dual-gate transducers are fabricated with buried electrodes to eliminate Faradaic leakage currents. The transducers are potentiometric sensors where the detection relies on measuring a shift in threshold voltage caused by changes in the electrochemical potential at the second gate dielectric. The sensitivity is enhanced over conventional ion-sensitive field-effect transistors by adjusting the ratio of the top and bottom gate capacitances.

  5. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Frontispiece
    7. Full Papers
    8. Frontispiece
    9. Full Papers
    10. Corrections
    1. (Adv. Funct. Mater. 6/2010)

      Article first published online: 22 MAR 2010 | DOI: 10.1002/adfm.201090017

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  6. Full Papers

    1. Top of page
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    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Frontispiece
    7. Full Papers
    8. Frontispiece
    9. Full Papers
    10. Corrections
    1. Air-Stable n-Type Organic Field-Effect Transistors Based on Carbonyl-Bridged Bithiazole Derivatives (pages 907–913)

      Yutaka Ie, Masashi Nitani, Makoto Karakawa, Hirokazu Tada and Yoshio Aso

      Article first published online: 25 FEB 2010 | DOI: 10.1002/adfm.200901803

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      An electronegative conjugated compound composed of a newly designed carbonyl-bridged bithiazole is synthesized as a candidate for air-stable n-type OFET materials. The properties of this compound are investigated by photophysical and electrochemical measurements. OFET devices based on this compound show high electron mobilities even under ambient conditions (see figure).

    2. Planar Alignment of Columnar Discotic Liquid Crystals by Isotropic Phase Dewetting on Chemically Patterned Surfaces (pages 914–920)

      Jonathan P. Bramble, Daniel J. Tate, Derek J. Revill, Khizar H. Sheikh, James R. Henderson, Feng Liu, Xiangbing Zeng, Goran Ungar, Richard J. Bushby and Stephen D. Evans

      Article first published online: 22 FEB 2010 | DOI: 10.1002/adfm.200902140

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      The dewetting of discotic liquid crystals (DLC) in their isotropic phase, on surfaces chemically patterned with stripes, produces isolated droplets in hydrophilic regions. Upon cooling into their columnar phase, a number of DLC materials can be found to be aligned in a planar manner with the columnar director either parallel or perpendicular to the patterning direction.

    3. Fully Transparent Non-volatile Memory Thin-Film Transistors Using an Organic Ferroelectric and Oxide Semiconductor Below 200 °C (pages 921–926)

      Sung-Min Yoon, Shinhyuk Yang, Chunwon Byun, Sang-Hee K. Park, Doo-Hee Cho, Soon-Won Jung, Oh-Sang Kwon and Chi-Sun Hwang

      Article first published online: 22 FEB 2010 | DOI: 10.1002/adfm.200902095

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      A fully transparent non-volatile memory thin-film transistor is demonstrated with a hybrid-type gate stack composed of an organic ferroelectric poly(vinylidene fluoride- trifluoroethylene) gate insulator and a semiconducting Al-Zn-Sn-O channel. The transmittance of the device is more than 90% at the wavelength of 550 nm. This embeddable transistor will provide functionalities for various system applications in future transparent electronics.

    4. Solution Processable Fluorenyl Hexa-peri-hexabenzocoronenes in Organic Field-Effect Transistors and Solar Cells (pages 927–938)

      Wallace W. H. Wong, T. Birendra Singh, Doojin Vak, Wojciech Pisula, Chao Yan, Xinliang Feng, Evan L. Williams, Khai Leok Chan, Qinghui Mao, David J. Jones, Chang-Qi Ma, Klaus Müllen, Peter Bäuerle and Andrew B. Holmes

      Article first published online: 4 MAR 2010 | DOI: 10.1002/adfm.200901827

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      The performance of organic electronic devices depends heavily on the charge transport property of the organic semiconductor material employed. Fluorenyl hexa-peri-hexabenzocoronene (FHBC) materials have the ability to self-organize into columnar structures which can enhance charge transport. A field-effect mobility of 2.8 × 10−3 cm2 V−1 s−1 was obtained for the organic field-effect transistor device and a power conversion efficiency of 1.5% was recorded for the bulk heterojunction solar cell.

    5. Surface-Grafted Gel-Brush/Metal Nanoparticle Hybrids (pages 939–944)

      Edmondo M. Benetti, XiaoFeng Sui, Szczepan Zapotoczny and G. Julius Vancso

      Article first published online: 11 MAR 2010 | DOI: 10.1002/adfm.200902114

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      The coupling of surface-confined polymer-ization techniques for the synthesis of well-defined brush layers and easy post-functionalization methods allows the pre-paration of gel-brush/metal nanoparticle hybrids. This new class of macromolecular platforms shows a multifunctional char-acter and precisely adjustable physical and structural properties. Such hybrid films may find applications as catalytic layers, antibacterial surfaces, sensors, and model platforms for optics and electronics.

    6. Enhanced Fluorescence Microscopic Imaging by Plasmonic Nanostructures: From a 1D Grating to a 2D Nanohole Array (pages 945–950)

      Xiaoqiang Cui, Keiko Tawa, Kenji Kintaka and Junji Nishii

      Article first published online: 25 FEB 2010 | DOI: 10.1002/adfm.200901993

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      Two-dimensional Ag metalized grating structures exhibit significant plasmonic coupling efficiency for enhanced fluorescence observations under a microscope. They have 100 times the enhancement of fluorescence intensity versus a plain glass surface, and an improvement of about three times the enhancement of fluorescence intensity of a 1D grating. This type of substrate has application in biodiagnostics, imaging, sensing, and photovoltaic cells.

    7. Gold-Nanocluster-Based Fluorescent Sensors for Highly Sensitive and Selective Detection of Cyanide in Water (pages 951–956)

      Yanlan Liu, Kelong Ai, Xiaoli Cheng, Lihua Huo and Lehui Lu

      Article first published online: 22 FEB 2010 | DOI: 10.1002/adfm.200902062

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      A gold-nanocluster-based fluorescent sensor for cyanide is presented, based on cyanide etching-induced fluorescence quenching of Au nanoclusters. This sensing system is proven to be highly sensitive and selective towards cyanide. Importantly, it can be readily used for detecting low-concentrations of cyanide in real water samples.

  7. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Frontispiece
    7. Full Papers
    8. Frontispiece
    9. Full Papers
    10. Corrections
    1. (Adv. Funct. Mater. 6/2010)

      Article first published online: 22 MAR 2010 | DOI: 10.1002/adfm.201090018

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  8. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Frontispiece
    7. Full Papers
    8. Frontispiece
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    10. Corrections
    1. Ordering of Disordered Nanowires: Spontaneous Formation of Highly Aligned, Ultralong Ag Nanowire Films at Oil–Water–Air Interface (pages 958–964)

      Hong-Yan Shi, Bo Hu, Xiao-Chun Yu, Rong-Li Zhao, Xi-Feng Ren, Shi-Lin Liu, Jian-Wei Liu, Mei Feng, An-Wu Xu and Shu-Hong Yu

      Article first published online: 4 MAR 2010 | DOI: 10.1002/adfm.200901668

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      Highly aligned, ultralong Ag nanowire films can spontaneously form at the three-phase interface of oil–water–air. The ordered films exhibit intrinsic large electromagnetic (EM) fields that are localized in the interstitials between adjacent nanowires. This new three-phase interface approach has been found to be a general route, and can be extended to self-assemble other ultralong nanowires to produce ordered films.

    2. Engineering Disorder in Superdiffusive Lévy Glasses (pages 965–968)

      Jacopo Bertolotti, Kevin Vynck, Lorenzo Pattelli, Pierre Barthelemy, Stefano Lepri and Diederik S. Wiersma

      Article first published online: 22 FEB 2010 | DOI: 10.1002/adfm.200902008

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      Typical disordered optical materials are known to lead to normal diffusive light transport. This article proposes a novel method to realize disordered dielectric samples in which light propagates superdiffusively. This unique feature is obtained by creating power-law spatial inhomogeneities in the density of light scatterers.

    3. Triplex Au–Ag–C Core–Shell Nanoparticles as a Novel Raman Label (pages 969–975)

      Aiguo Shen, Lifang Chen, Wei Xie, Juncheng Hu, Ao Zeng, Ryan Richards and Jiming Hu

      Article first published online: 16 FEB 2010 | DOI: 10.1002/adfm.200901847

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      A controllable and convenient hydrothermal synthetic route is developed to synthesize layer-by-layer triplex Au–Ag–C core–shell nanoparticles, which can incorporate the SERS (surface-enhanced Raman spectroscopy) label, 4-mercapto benzoic acid (4-MBA). The colloidal carbon-encapsulated Aucore/Agshell spheres have a monodisperse size distribution, and they act as a novel type of SERS tag to detect mouse IgG at concentrations of ∼100–10 ng/mL.

    4. Quantum-Dot-Tagged Bioresponsive Hydrogel Suspension Array for Multiplex Label-Free DNA Detection (pages 976–982)

      Yuanjin Zhao, Xiangwei Zhao, Baocheng Tang, Wenyu Xu, Juan Li, Jing Hu and Zhongze Gu

      Article first published online: 22 FEB 2010 | DOI: 10.1002/adfm.200901812

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      Quantum-dot-tagged bioresponsive hydrogel photonic beads are used as the encoded microcarriers of a suspension array for multiplex label-free DNA detection. In the assay, specific hybridization of the DNA will cause hydrogel shrinking, which can be detected as a corresponding blue-shift in the beads' Bragg diffraction peak that can then be used for quantitatively estimating the amount of target DNA.

    5. Nanocrystalline Electroplated Cu–Ni: Metallic Thin Films with Enhanced Mechanical Properties and Tunable Magnetic Behavior (pages 983–991)

      Eva Pellicer, Aïda Varea, Salvador Pané, Bradley J. Nelson, Enric Menéndez, Marta Estrader, Santiago Suriñach, Maria Dolors Baró, Josep Nogués and Jordi Sort

      Article first published online: 4 MAR 2010 | DOI: 10.1002/adfm.200901732

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      Nanocrystalline electroplated Cu1–xNix thin films show an interesting combination of mechanical and magnetic properties. These films exhibit large and tunable values of hardness and Young's modulus, linked to the reduced crystallite sizes. From a magnetic viewpoint, either paramagnetic or ferromagnetic behavior is observed depending on the exact alloy composition.

    6. A Reusable Interface Constructed by 3-Aminophenylboronic Acid-Functionalized Multiwalled Carbon Nanotubes for Cell Capture, Release, and Cytosensing (pages 992–999)

      Xue Zhong, Hai-Jing Bai, Jing-Juan Xu, Hong-Yuan Chen and Yu-Hua Zhu

      Article first published online: 4 MAR 2010 | DOI: 10.1002/adfm.200901915

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      Efficient cell attachment, detachment, and excellent conductivity are obtained from nanocomposite boronic acid-functionalized multiwalled carbon nanotubes. Using K562 leukemia cells as a model, this nanocomposite is used to construct a reusable impedance biosensor for cell determination. The sensor not only measures the quantity of the cells but it can also determine their proliferation or apoptosis state.

    7. Hysteresis in Conjugated Polymer Thin Film Transistors Generated by Chain Relaxation (pages 1000–1004)

      Neng-Jye Yang, Chien-Shiun Liao and Show-An Chen

      Article first published online: 25 FEB 2010 | DOI: 10.1002/adfm.200902129

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      Temperature-dependent hysteresis for conjugated polymers in the operation of a polymer thin film transistor (PTFT) is observed for the first time. This observation is explained by the limited main chain segmental motion that cannot be aligned by polarization in phase with the applied gate voltage. This investigation shows for the first time that chain relaxation in conjugated polymers is the origin of the hysteresis in PTFT.

    8. Interface Modifications of InAs Quantum-Dots Solids and their Effects on FET Performance (pages 1005–1010)

      Michal Soreni-Harari, David Mocatta, Marina Zimin, Yair Gannot, Uri Banin and Nir Tessler

      Article first published online: 1 MAR 2010 | DOI: 10.1002/adfm.200902149

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      Semiconducting films of InAs quantum dots targeted for optoelectronic applications are fabricated and investigated in field-effect transistors. A cascade of interface modifications allowed for improved performance following each film treatment, resulting in ON/OFF ratios of around 105 for these transistors.

    9. Fabrication of CdSe-Nanofibers with Potential for Biomedical Applications (pages 1011–1018)

      Amir Fahmi, Torsten Pietsch, Maria Bryszewska, José Carlos Rodríguez-Cabello, Aneta Koceva-Chyla, Francisco Javier Arias, Matilde Alonso Rodrigo and Nabil Gindy

      Article first published online: 22 FEB 2010 | DOI: 10.1002/adfm.200902013

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      A simple route is presented to fabricate water-soluble CdSe-nanofibers by the self-assembly of elastin-like polymers (ELPs). Non-toxic CdSe nanoparticles are synthesized and effectively stabilized in situ at room temperature with the ELP shell. The self-assembly into nanofibers is directed by adjusting the pH value of the solution. The nanofibers show a non-toxic response and increased cell viability against B14 hamster fibroblast cells.

    10. High-Performance Phototransistors Based on Organic Microribbons Prepared by a Solution Self-Assembly Process (pages 1019–1024)

      Yunlong Guo, Chunyan Du, Gui Yu, Chong-an Di, Shidong Jiang, Hongxia Xi, Jian Zheng, Shouke Yan, Cailan Yu, Wenping Hu and Yunqi Liu

      Article first published online: 1 MAR 2010 | DOI: 10.1002/adfm.200901662

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      6-Methyl-anthra[2,3-b]benzo[d]thiophene (Me-ABT) is synthesized and its high-quality microribbons are grown by a solution process. The solution of Me-ABT demonstrates a moderate fluorescence quantum yield of 0.34 while the microribbons show a glaucous light emission. Phototransistors based on an individual Me-ABT microribbon prepared by a solution-phase self-assembly process show a high mobility of 1.66 cm2 V−1 s−1, a large photoresponsivity of 12 000 A W−1, and a photocurrent/dark-current ratio of 6000.

  9. Corrections

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Frontispiece
    7. Full Papers
    8. Frontispiece
    9. Full Papers
    10. Corrections
    1. You have free access to this content
      Delivery of Nucleic Acids through the Controlled Disassembly of Multifunctional Nanocomplexes

      Mahmoud Elsabahy, Nada Wazen, Núria Bayó-Puxan, Glen Deleavey, Marc Servant, Masad J. Damha and Jean-Christophe Leroux

      Article first published online: 4 NOV 2010 | DOI: 10.1002/adfm.201090019

      This article corrects:

      Delivery of Nucleic Acids through the Controlled Disassembly of Multifunctional Nanocomplexes

      Vol. 19, Issue 24, 3862–3867, Article first published online: 26 OCT 2009

    2. You have free access to this content
      Time Controlled Protein Release from Layer-by-Layer Assembled Multilayer Functionalized Agarose Hydrogels

      Sumit Mehrotra, Daniel Lynam, Ryan Maloney, Kendell M. Pawelec, Mark H. Tuszynski, Ilsoon Lee, Christina Chan and Jeffrey Sakamoto

      Article first published online: 4 NOV 2010 | DOI: 10.1002/adfm.201090020

      This article corrects:

      Time Controlled Protein Release from Layer-by-Layer Assembled Multilayer Functionalized Agarose Hydrogels

      Vol. 20, Issue 2, 247–258, Article first published online: 20 NOV 2009

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