Advanced Functional Materials

Cover image for Vol. 19 Issue 6

March 24, 2009

Volume 19, Issue 6

Pages 819–970

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Index
    1. Nanocrystal Shape Control: Synthesis and Structure–Property Correlation in Shape-Controlled ZnO Nanoparticles Prepared by Chemical Vapor Synthesis and their Application in Dye-Sensitized Solar Cells (Adv. Funct. Mater. 6/2009)

      Revathi R. Bacsa, Jeannette Dexpert-Ghys, Marc Verelst, Andrea Falqui, Bruno Machado, Wolfgang S. Bacsa, Peter Chen, Shaik M. Zakeeruddin, Michael Graetzel and Philippe Serp

      Article first published online: 19 MAR 2009 | DOI: 10.1002/adfm.200990018

      Thumbnail image of graphical abstract

      Chemical vapor synthesis is a convenient one-step synthesis process for the production of nanocrystalline powders. On page 875, Bacsa et al. report that by controlled variation of experimental parameters, tetrapods (as in image) or spherical ZnO nanocrystals can be selectively obtained directly from Zn metal precursor. Shape control leads to improved optical properties and a better performance when applied as electrodes in dye sensitized solar cells.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Index
    1. Biological Sensor Platforms: Photoluminescence Detection of Biomolecules by Antibody-Functionalized Diatom Biosilica (Adv. Funct. Mater. 6/2009)

      Debra K. Gale, Timothy Gutu, Jun Jiao, Chih-Hung Chang and Gregory L. Rorrer

      Article first published online: 19 MAR 2009 | DOI: 10.1002/adfm.200990019

      Thumbnail image of graphical abstract

      Microscopic shells of single-celled algae called diatoms possess intricate nanoscale features composed of photoluminescent biosilica. On page 926, the functionalization of the 10 µm centric diatom Cyclotella (center image) with the antibody Immunoglobulin G, and its use as a biosensor for immunocomplex formation are reported by D. K. Gale et al. Such formation is visible across the entire biosilica surface using FITC-labeled antigen (green image) and antigen labeled with 10 nm gold nanoparticles (top image).

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Index
    1. Contents: (Adv. Funct. Mater. 6/2009) (pages 819–825)

      Article first published online: 19 MAR 2009 | DOI: 10.1002/adfm.200990020

  4. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Index
    1. A Smart Nanoprobe Based On Fluorescence-Quenching PEGylated Nanogels Containing Gold Nanoparticles for Monitoring the Response to Cancer Therapy (pages 827–834)

      Motoi Oishi, Atsushi Tamura, Takahito Nakamura and Yukio Nagasaki

      Article first published online: 11 FEB 2009 | DOI: 10.1002/adfm.200801164

      Thumbnail image of graphical abstract

      A smart apoptosis nanoprobe based on a PEGylated nanogel that contains gold nanoparticles (GNPs) and fluorescein isothiocyanate (FITC)-labeled DEVD peptides is prepared for monitoring the cancer response to therapy. The as-prepared FITC–DEVD–nanogel–GNP shows remarkable quenching/dequenching of fluorescence signals in response to activated caspase-3 in cell-free conditions as well as in cell culture.

    2. Interfacial Strain-Induced Oxygen Disorder as the Cause of Enhanced Critical Current Density in Superconducting Thin Films (pages 835–841)

      Stuart C. Wimbush, Meicheng Li, Mary E. Vickers, Boris Maiorov, D. Matt Feldmann, Quanxi Jia and Judith L. MacManus-Driscoll

      Article first published online: 2 FEB 2009 | DOI: 10.1002/adfm.200801112

      Thumbnail image of graphical abstract

      Detailed X-ray measurements of the misorientation and microstrain in R123 thin films reveal a direct correlation between thickness dependent granular misorientation induced by strain and the field and thickness dependence of Jc. This disorder correlates with decreased orthorhombicity (see figure) in the thinner films and an improved Jc for fields applied within the ab plane compared to along c. Collectively, the results point to an enhancement of Jc by interfacial strain induced oxygen disorder.

    3. Enhanced Antibacterial Activity of Nanocrystalline ZnO Due to Increased ROS-Mediated Cell Injury (pages 842–852)

      Guy Applerot, Anat Lipovsky, Rachel Dror, Nina Perkas, Yeshayahu Nitzan, Rachel Lubart and Aharon Gedanken

      Article first published online: 11 FEB 2009 | DOI: 10.1002/adfm.200801081

      Thumbnail image of graphical abstract

      A water suspension of ZnO nanoparticles releases an excess of reactive oxygen radicals (ROS) as demonstrated by applying electron spin resonance measurements coupled with a spin trapping technique. Moreover, it is apparent that ZnO nanoparticles promote an enhanced toxicity toward bacteria. Monitoring ROS production in the presence of bacteria shows increased oxidative stress, partially resulting from within the bacterial cells.

    4. Combined Optical and MR Bioimaging Using Rare Earth Ion Doped NaYF4 Nanocrystals (pages 853–859)

      Rajiv Kumar, Marcin Nyk, Tymish Y. Ohulchanskyy, Christopher A. Flask and Paras N. Prasad

      Article first published online: 18 FEB 2009 | DOI: 10.1002/adfm.200800765

      Thumbnail image of graphical abstract

      Multimodal NaYF4 nanophosphors doped with rare earth ions are synthesized and characterized. The nanophosphors exhibit good optical and magnetic properties which can be exploited in vitro and in vivo for optical fluorescence (see image) and MR imaging.

    5. Noble Metal Nanocrystal-Incorporated Fullerene-Like Polyoxometalate Based Microspheres (pages 860–865)

      Amjad Nisar, Xiangxing Xu, Shuling Shen, Shi Hu and Xun Wang

      Article first published online: 2 FEB 2009 | DOI: 10.1002/adfm.200801580

      Thumbnail image of graphical abstract

      Fullerene-like POMs with tunable structures have been developed as new-type of supports for noble metal nanocrystals. Combining the merits of fullerene-like POMs and monodisperse noble metal nanocrystals, these hybrid spheres have shown novel composition- and size-dependent photochemical properties which can be expected to open a new research field to develop multifunctional materials with unique physical and chemical properties.

    6. Time-Dependent Morphology Evolution by Annealing Processes on Polymer:Fullerene Blend Solar Cells (pages 866–874)

      Jang Jo, Seok-Soon Kim, Seok-In Na, Byung-Kwan Yu and Dong-Yu Kim

      Article first published online: 13 FEB 2009 | DOI: 10.1002/adfm.200800968

      Thumbnail image of graphical abstract

      Changes in the nanoscale morphologies (see figure) based on the blend films of poly(3-hexylthiophene) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) for high-performance bulk-heterojunction solar cells are compared and investigated after annealing processes with different time scales for morphology evolution, with special consideration for the diffusion and aggregation of PCBM.

    7. Synthesis and Structure–Property Correlation in Shape-Controlled ZnO Nanoparticles Prepared by Chemical Vapor Synthesis and their Application in Dye-Sensitized Solar Cells (pages 875–886)

      Revathi R. Bacsa, Jeannette Dexpert-Ghys, Marc Verelst, Andrea Falqui, Bruno Machado, Wolfgang S. Bacsa, Peter Chen, Shaik M. Zakeeruddin, Michael Graetzel and Philippe Serp

      Article first published online: 20 FEB 2009 | DOI: 10.1002/adfm.200801049

      Thumbnail image of graphical abstract

      The chemical vapor synthesis of shape-controlled ZnO nanoparticles in the 8–40 nm size range is presented. The influence of the experimental parameters on the morphology and defect structure of the ZnO obtained is described in detail. The application of nanotetrapods of ZnO in dye sensitized solar cells with ionic liquid electrolyte is described.

    8. Biofunctionalization of Vertically Aligned Diamond Nanowires (pages 887–893)

      Nianjun Yang, Hiroshi Uetsuka and Christoph E. Nebel

      Article first published online: 23 FEB 2009 | DOI: 10.1002/adfm.200801392

      Thumbnail image of graphical abstract

      Vertically aligned diamond nanowires are biofunctionalized using aminophenyl linker molecules to bond nucleic acid molecules with a well-defined nanometer-sized spacing to the transducer. This novel DNA biosensor combines the outstanding electrochemical properties of diamond as a transducer with the controlled bonding of DNA molecules to the tips of nanowires by use of an electrochemical attachment scheme.

    9. Polymer Photovoltaic Cells Based on Solution-Processable Graphene and P3HT (pages 894–904)

      Qian Liu, Zunfeng Liu, Xiaoyan Zhang, Liying Yang, Nan Zhang, Guiling Pan, Shougen Yin, Yongsheng Chen and Jun Wei

      Article first published online: 13 FEB 2009 | DOI: 10.1002/adfm.200800954

      Thumbnail image of graphical abstract

      Organic photovoltaic cells based on soluble graphene are studied with regard to graphene content, annealing conditions, and morphology. Annealing treatment at an appropriate temperature greatly improves the device performance, and moderate graphene content in the polymer matrix forming an interconnecting network and avoiding aggregation favors the device performance.

    10. Functionalized Siloles: Versatile Synthesis, Aggregation-Induced Emission, and Sensory and Device Applications (pages 905–917)

      Zhen Li, Yong Qiang Dong, Jacky W. Y. Lam, Jiaxin Sun, Anjun Qin, Matthias Häußler, Yu Ping Dong, Herman H. Y. Sung, Ian D. Williams, Hoi Sing Kwok and Ben Zhong Tang

      Article first published online: 11 FEB 2009 | DOI: 10.1002/adfm.200801278

      Thumbnail image of graphical abstract

      A versatile synthetic route for silole functionalization is developed. The functionalized siloles show aggregation-induced emission (AIE) characteristics. The AIE effect enables them to function as fluorescence quenchers, pH sensors, explosive detectors, and biological probes (see figure; BSA: bovine serum albumin). The siloles also serve as active layers in electroluminescent devices and as photosensitive films in fluorescence pattern generation.

    11. Capacity Fading Mechanism in All Solid-State Lithium Polymer Secondary Batteries Using PEG-Borate/Aluminate Ester as Plasticizer for Polymer Electrolytes (pages 918–925)

      Fuminari Kaneko, Shinta Wada, Masanobu Nakayama, Masataka Wakihara, Jun Koki and Shigeki Kuroki

      Article first published online: 18 FEB 2009 | DOI: 10.1002/adfm.200800789

      Thumbnail image of graphical abstract

      The degradation mechanism in lithium polymer batteries is investigated using combined AC impedance, ex-situ PGStE NMR, and ex- situ SEM/EDS methods. Clear evidence of a side reaction at the cathode|polymer-electrolyte interface is observed. This paper offers an insight into the ion exchange reaction at a ceramic|polymer hybrid interface.

    12. Photoluminescence Detection of Biomolecules by Antibody-Functionalized Diatom Biosilica (pages 926–933)

      Debra K. Gale, Timothy Gutu, Jun Jiao, Chih-Hung Chang and Gregory L. Rorrer

      Article first published online: 9 FEB 2009 | DOI: 10.1002/adfm.200801137

      Thumbnail image of graphical abstract

      Microscopic silica shells of single-celled algae called diatoms possess intricate nanoscale features imbedded within periodic pore structures. Antibody-functionalized diatom biosilica serves as a microscale biosensor platform for the photoluminescence-based detection of immunocomplex formation.

    13. Rich Phase Behavior in a Supramolecular Conducting Material Derived from an Organogelator (pages 934–941)

      Josep Puigmartí-Luis, Elena E. Laukhina, Vladimir N. Laukhin, Ángel Pérez del Pino, Narcis Mestres, José Vidal-Gancedo, Concepció Rovira and David B. Amabilino

      Article first published online: 13 FEB 2009 | DOI: 10.1002/adfm.200801082

      Thumbnail image of graphical abstract

      A conducting organic tetrathiafulvalene-based supramolecular material is prepared and possesses a rich phase behavior with different arrangement of the molecules in the different forms. The distinct phases of conducting nanofibers can be easily fabricated through the temperature control of their preparation process from a xerogel by doping with iodine vapors.

    14. A General Approach to First Order Phase Transitions and the Anomalous Behavior of Coexisting Phases in the Magnetic Case (pages 942–949)

      Sergio Gama, Ariana de Campos, Adelino A. Coelho, Cleber S. Alves, Yang Ren, Flávio Garcia, Dennis E. Brown, Luzeli M. da Silva, A. Magnus G. Carvalho, Flávio C. G. Gandra, Adenilson O. dos Santos, Lisandro P. Cardoso and Pedro J. von Ranke

      Article first published online: 6 FEB 2009 | DOI: 10.1002/adfm.200801185

      Thumbnail image of graphical abstract

      A new conceptual framework for first order transitions on exotic systems is presented. These transitions must occur along intervals of temperature and of the ordering parameters and obey a generalized Clausius–Clapeyron equation. When the ordering parameter is magnetization, measurements of magnetic and lattice properties during the transitions reveal anomalous behavior for these properties. These anomalies are hidden in the behavior of the global properties of the magnetic systems (see figure).

    15. Organic Light-Emitting Diodes Based on Poly(9,9-dioctylfluorene-co-bithiophene) (F8T2) (pages 950–957)

      Peter A. Levermore, Rui Jin, Xuhua Wang, John C. de Mello and Donal D. C. Bradley

      Article first published online: 6 FEB 2009 | DOI: 10.1002/adfm.200801260

      Thumbnail image of graphical abstract

      The optical properties of poly(9,9-dioctylfluorene-co-bithiopehene) (F8T2) (see diagram), a polymer already known for its effective charge carrier transport, are studied in this work. The demonstration of bright green electroluminescence (EL) from polymer light-emitting diodes (PLEDs) based on F8T2 could be of interest in the development of emissive materials not only for PLEDs, but also for organic light-emitting field-effect transistors (FETs) and electrically pumped organic lasers, where a union of efficient EL and effective charge transport is required.

    16. Threshold Voltage Shifts in Organic Thin-Film Transistors Due to Self-Assembled Monolayers at the Dielectric Surface (pages 958–967)

      Stefan K. Possanner, Karin Zojer, Peter Pacher, Egbert Zojer and Ferdinand Schürrer

      Article first published online: 29 JAN 2009 | DOI: 10.1002/adfm.200801466

      Thumbnail image of graphical abstract

      The impact of self-assembled monolayers (SAMs) at the organic semiconductor–dielectric interface in organic thin-film transistors is quantitatively described by means of two-dimensional simulations. It is shown that realistically chosen molecular dipole densities at the interface lead to threshold voltage shifts not exceeding 2 V, while a partial ionization of the SAM can give rise to shifts of several tens of volts.

  5. Index

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Index
    1. Author Index and Subject Index Adv. Funct. Mater. 6/2009 (pages 969–970)

      Article first published online: 19 MAR 2009 | DOI: 10.1002/adfm.200990021

SEARCH

SEARCH BY CITATION