Advanced Functional Materials

Cover image for Vol. 17 Issue 4

March, 2007

Volume 17, Issue 4

Pages 499–664

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Full Papers
    6. Index
    1. Cover Picture: A Hierarchically Structured Ni(OH)2 Monolayer Hollow-Sphere Array and Its Tunable Optical Properties over a Large Region (Adv. Funct. Mater. 4/2007)

      G. Duan, W. Cai, Y. Luo and F. Sun

      Version of Record online: 22 FEB 2007 | DOI: 10.1002/adfm.200790014

      A 2D optical array made up of hollow spheres leads to a tunable stop band in the near IR to visible region (see figure). The stop band is nearly independent of the incidence beam but can be coarse-tuned by adjusting the size of the spheres and fine-tuned by changing the deposition time of the spheres. The reported process is simple and low cost and results in possible optical sensors for alcohol detection.

  2. Contents

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Full Papers
    6. Index
  3. Editorial

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Full Papers
    6. Index
    1. Knowledge for Generations (pages 511–512)

      P. Gregory

      Version of Record online: 22 FEB 2007 | DOI: 10.1002/adfm.200700198

      For nearly twenty years, the Advanced Materials family of journals has been a rich source of knowledge for the materials science community. Returning as Editor-in-Chief, Peter Gregory reflects on this tradition of reporting outstanding research, and offers some views on maintaining these standards for future generations.

  4. Full Papers

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Full Papers
    6. Index
    1. Highly Ordered 2D Hydrogen-Bonded Structures of a Tetralactam Macrocycle on the Au(111) Surface (pages 513–519)

      I. Kossev, W. Reckien, B. Kirchner, T. Felder, M. Nieger, C. A. Schalley, F. Vögtle and M. Sokolowski

      Version of Record online: 26 JAN 2007 | DOI: 10.1002/adfm.200600540

      Thumbnail image of graphical abstract

      Tetralactam macrocycles, deposited by using vacuum sublimation, form highly ordered, networklike phases on the Au(111) surface. From scanning tunneling microscopy in combination with theoretical modeling it is deduced that pairs of intermolecular hydrogen bonds between next-neighbor molecules are responsible for the self-organization (see figure).

    2. Color Tuning and Highly Efficient Blue Emitters of Finite Diphenylamino-Containing Oligo(arylenevinylene) Derivatives Using Fluoro Substituents (pages 520–530)

      H.-C. Li, Y.-P. Lin, P.-T. Chou, Y.-M. Cheng and R.-S. Liu

      Version of Record online: 29 JAN 2007 | DOI: 10.1002/adfm.200600187

      Thumbnail image of graphical abstract

      Fluoro-substituted diphenylamino-containing oligo(arylenevinylene) derivatives (see figure) are prepared. The compounds show deep-blue to orange (448–579 nm) emission with excellent quantum yields (0.68-0.95) in CH2Cl2. The electroluminescence performance of these oligomers in model devices demonstrates their potential application in OLED displays.

    3. Self-Rupturing and Hollow Microcapsules Prepared from Bio-polyelectrolyte-Coated Microgels (pages 531–537)

      B. G. De Geest, C. Déjugnat, M. Prevot, G. B. Sukhorukov, J. Demeester and S. C. De Smedt

      Version of Record online: 24 JAN 2007 | DOI: 10.1002/adfm.200600198

      Thumbnail image of graphical abstract

      Biodegradable microgels are coated with bio-polyelectrolytes by using the layer-by-layer (LbL) technique. Following the degradation of the microgel core, the LbL coating can rupture or stay intact, depending on the bio-polyelectrolytes used (see figure). Both self-rupturing and hollow capsules could be of interest for biomedical applications.

    4. Insight into the Role of Oxidation in the Thermally Induced Green Band in Fluorene-Based Systems (pages 538–548)

      R. Grisorio, G. P. Suranna, P. Mastrorilli and C. F. Nobile

      Version of Record online: 24 JAN 2007 | DOI: 10.1002/adfm.200600083

      Thumbnail image of graphical abstract

      Spectral stability of polyfluorenes is addressed by investigating the possible pathways of their radical degradation, the effect of the formation of fluorenone agglomerates, and the role of metal impurities in triggering the oxidation process. New, spectrally stable spirofluorene copolymers are prepared (see figure).

    5. Transparent Mesoporous Nanocomposite Films for Self-Cleaning Applications (pages 549–554)

      E. Allain, S. Besson, C. Durand, M. Moreau, T. Gacoin and J.-P. Boilot

      Version of Record online: 26 JAN 2007 | DOI: 10.1002/adfm.200600197

      Thumbnail image of graphical abstract

      A versatile approach for the elaboration of TiO2 based photocatalytic coatings is studied. It relies on the dispersion of TiO2 nanoparticles inside a surfactant-templated mesoporous silica film (see figure). The activity of these films is found to be improved by more than an order of magnitude compared to those obtained with a usual microporous silica binder.

    6. Long K-Doped Titania and Titanate Nanowires on Ti Foil and FTO/Quartz Substrates for Solar-Cell Applications (pages 555–562)

      K. Y. Cheung, C. T. Yip, A. B. Djurišić, Y. H. Leung and W. K. Chan

      Version of Record online: 26 JAN 2007 | DOI: 10.1002/adfm.200600508

      Thumbnail image of graphical abstract

      Power conversion efficiencies of 1.88 % in TiO2 solar cells are achieved using K-doped titania nanowires. The direct oxidation of Ti in the presence of KF and water vapor results in uniform thin nanowires (see figure), which leads to high short-circuit currents and high efficiencies when used in solar-cell applications. The growth method can be used for Ti foils as well as for Ti films on quartz substrates and the dependence of the morphology of the nanowires on the substrate temperature and KF concentration is elucidated.

    7. Ultrafast Spectroscopic Study of Photoinduced Electron Transfer in an Oligo(thienylenevinylene):Fullerene Composite (pages 563–568)

      I.-W. Hwang, Q.-H. Xu, C. Soci, B. Chen, A. K.-Y. Jen, D. Moses and A. J. Heeger

      Version of Record online: 26 JAN 2007 | DOI: 10.1002/adfm.200600267

      Thumbnail image of graphical abstract

      Photoinduced electron transfer in an oligo(thienylenevinylene):fullerene composite (see figure) is studied by using ultrafast spectroscopic methods. In this composite, the photoexcitations decay primarily via intrachain relaxation rather than photoinduced electron transfer from the oligomer to the fullerene. These results differ strongly from photoexcitation dynamics typically found in conjugated polymers.

    8. Thioether-bridged Mesoporous Organosilicas: Mesophase Transformations Induced by the Bridged Organosilane Precursor (pages 569–576)

      J. Liu, Q. Yang, L. Zhang, D. Jiang, X. Shi, J. Yang, H. Zhong and C. Li

      Version of Record online: 26 JAN 2007 | DOI: 10.1002/adfm.200600379

      Thumbnail image of graphical abstract

      Thioether-bridged mesoporous organosilicas with a highly ordered 2D hexagonal structure, vesiclelike structure, or cellular foamlike structure are controllably synthesized by simply tuning the molar ratio of bis[3-(triethoxysilyl)propyl]tetrasulfide/tetramethoxysilane (TESPTS/TMOS) in Si/P123/NaAc–HAc/ethanol/H2O systems. Concentration-dependent interactions between TESPTS and the P123 surfactant are found to have a major influence on the final structure.

    9. Guest-Induced Chirality in the Ferrimagnetic Nanoporous Diamond Framework Mn3(HCOO)6 (pages 577–584)

      B. Zhang, Z.-M. Wang, M. Kurmoo, S. Gao, K. Inoue and H. Kobayashi

      Version of Record online: 24 JAN 2007 | DOI: 10.1002/adfm.200600265

      Thumbnail image of graphical abstract

      Inclusion of chiral guest molecules (see figure) into the channels of an achiral porous magnet results in both enantiomeric as well as meso solids. The magnetic, optical, and thermal properties of these novel materials are reported as well as their crystallographic data. It is clear that a new approach to optically and magnetically active materials has been found.

    10. Conductive Mesocellular Silica–Carbon Nanocomposite Foams for Immobilization, Direct Electrochemistry, and Biosensing of Proteins (pages 585–592)

      S. Wu, H. X. Ju and Y. Liu

      Version of Record online: 24 JAN 2007 | DOI: 10.1002/adfm.200600491

      Thumbnail image of graphical abstract

      A mesocellular silica–carbon nanocomposite foam is designed with a highly ordered mesostructure, good biocompatibility, favorable conductivity and hydrophilicity for immobilization and biosensing applications of proteins. Immobilized glucose oxidase (see figure) shows good selectivity, stability, and electrochemical performance (GCE: glassy-carbon electrode).

    11. Fabrication of Superhydrophobic Surfaces on Engineering Materials by a Solution-Immersion Process (pages 593–596)

      M. Qu, B. Zhang, S. Song, L. Chen, J. Zhang and X. Cao

      Version of Record online: 26 JAN 2007 | DOI: 10.1002/adfm.200600472

      Thumbnail image of graphical abstract

      Wet chemical etching and surface coating with fluoroalkylsilane results in superhydrophobic steel (see figure), titanium, and copper alloy surfaces. The as-prepared surfaces show superhydrophobicity not only for water but also for corrosive liquids such as acid, basic, and salt solutions. These properties may open new possibilities for the use of steel and alloy materials in industrial engineering, especially in the field of naval engineering.

    12. Low-Operating-Voltage Organic Transistors Made of Bifunctional Self-Assembled Monolayers (pages 597–604)

      M. Mottaghi, P. Lang, F. Rodriguez, A. Rumyantseva, A. Yassar, G. Horowitz, S. Lenfant, D. Tondelier and D. Vuillaume

      Version of Record online: 26 JAN 2007 | DOI: 10.1002/adfm.200600179

      Thumbnail image of graphical abstract

      Organic field-effect transistors are described, built on a self-assembled monolayer made of bifunctional molecules comprising a short alkyl chain linked to an oligothiophene moiety. Well-defined current–voltage curves with a clear saturation are obtained for some devices, allowing an estimation of the mobility. The devices operate at room temperature and very low bias, which may open the way to applications where low consumption is required.

    13. Colloidal Suspensions of Nanometer-Sized Mesoporous Silica (pages 605–612)

      K. Möller, J. Kobler and T. Bein

      Version of Record online: 26 JAN 2007 | DOI: 10.1002/adfm.200600578

      Thumbnail image of graphical abstract

      Spherical mesoporous silica particles with dimensions smaller than 200 nm are prepared as stable colloidal suspensions. A high-yield synthesis procedure based on a cationic surfactant and low water content enables the adjustment of the size range of the individual particles between 50 and 100 nm (see figure). Template molecules can be extracted from the nanoscale mesoporous particles via sonication in acidic media.

    14. Siliceous Unilamellar Vesicles and Foams by Using Block-Copolymer Cooperative Vesicle Templating (pages 613–617)

      H. Wang, Y. Wang, X. Zhou, L. Zhou, J. Tang, J. Lei and C. Yu

      Version of Record online: 26 JAN 2007 | DOI: 10.1002/adfm.200600407

      Thumbnail image of graphical abstract

      Siliceous unilamellar vesicles and foams are fabricated via a cooperative block-copolymer vesicle templating approach. At controlled pH, a tubular micelle [RIGHTWARDS ARROW] unilamellar vesicle [RIGHTWARDS ARROW] nanofoam structural transformation is observed by increasing the temperature (see figure). Siliceous nanofoams show superior bioimmobilization capacity for large biomolecules.

    15. Raspberry-like Gold Microspheres: Preparation and Electrochemical Characterization (pages 618–622)

      Z. Li, V. Ravaine, S. Ravaine, P. Garrigue and A. Kuhn

      Version of Record online: 24 JAN 2007 | DOI: 10.1002/adfm.200600667

      Thumbnail image of graphical abstract

      Gold microparticles with tunable size and surface roughness are assembled on electrodes by a simple layer-by-layer technique. In particular, raspberry-like particles (see figure) with a high surface area are obtained. The straightforward method to produce quasi-monodisperse gold microspheres from a commercial plating solution shows great potential for the production of high surface area noble-metal-based catalysts or building units for biosensors.

    16. From Mesostructured Wurtzite ZnS-Nanowire/Amine Nanocomposites to ZnS Nanowires Exhibiting Quantum Size Effects: A Mild-Solution Chemistry Approach (pages 623–631)

      W.-T. Yao, S.-H. Yu and Q.-S. Wu

      Version of Record online: 26 JAN 2007 | DOI: 10.1002/adfm.200600239

      Thumbnail image of graphical abstract

      Mesostructured nanocomposite arrays of wurtzite ZnS nanowires and alkyl amines, as shown in the figure, are obtained by a mild low-temperature solvothermal reaction. Individual nanowires are obtained by chemically or thermally disrupting the amine-mediated assembly. The nanocomposites and individual nanowires both exhibit strong quantum size effects.

    17. Photoconductivity of a Low-Bandgap Conjugated Polymer (pages 632–636)

      C. Soci, I.-W. Hwang, D. Moses, Z. Zhu, D. Waller, R. Gaudiana, C. J. Brabec and A. J. Heeger

      Version of Record online: 26 JAN 2007 | DOI: 10.1002/adfm.200600199

      Thumbnail image of graphical abstract

      The photoconductive properties of a low-bandgap conjugated polymer, PCPDTBT (see figure), are studied. Photoresponsivities of PCPDTBT and PCPDTBT:fullerene-derivative (PCBM) blends are comparable to those of poly(3-hexylthiophene), P3HT, and P3HT:PCBM. The spectral sensitivity of PCPDTBT:PCBM extends significantly deeper into the IR than that of P3HT, improving solar-light harvesting and offering potential for use in solar cells.

    18. Hybrid “Golden Fleece”: Synthesis and Catalytic Performance of Uniform Carbon Nanofibers and Silica Nanotubes Embedded with a High Population of Noble-Metal Nanoparticles (pages 637–643)

      H.-S. Qian, M. Antonietti and S.-H. Yu

      Version of Record online: 24 JAN 2007 | DOI: 10.1002/adfm.200600657

      Thumbnail image of graphical abstract

      Noble-metal nanoparticles have been embedded in hydrothermally grown carbon nanofibers, as shown in the left panel of the figure. These hybrid structures can be used as templates for the fabrication of silica nanotubes filled with metal nanoparticles, as illustrated in the right panel of the figure. The hybrid nanoparticle–nanofiber structures serve as excellent catalysts for the conversion of CO to CO2 at low temperatures.

    19. A Hierarchically Structured Ni(OH)2 Monolayer Hollow-Sphere Array and Its Tunable Optical Properties over a Large Region (pages 644–650)

      G. Duan, W. Cai, Y. Luo and F. Sun

      Version of Record online: 24 JAN 2007 | DOI: 10.1002/adfm.200600568

      Thumbnail image of graphical abstract

      A 2D optical array made up of hollow spheres leads to a tunable stop band in the near IR to visible region (see figure). The stop band is nearly independent of the incidence beam but can be coarse-tuned by adjusting the size of the spheres and fine-tuned by changing the deposition time of the spheres. The reported process is simple and low cost and results in possible optical sensors for alcohol detection.

    20. Tuning the Energy Level and Photophysical and Electroluminescent Properties of Heavy Metal Complexes by Controlling the Ligation of the Metal with the Carbon of the Carbazole Unit (pages 651–661)

      C. L. Yang, X. W. Zhang, H. You, L. Y. Zhu, L. Q. Chen, L. N. Zhu, Y. T. Tao, D. G. Ma, Z. G. Shuai and J. G. Qin

      Version of Record online: 24 JAN 2007 | DOI: 10.1002/adfm.200600663

      Thumbnail image of graphical abstract

      Carbazole-based metal complexes exhibiting emission from blue-green to red have been designed and prepared. Their energy levels, photoluminescence, and electroluminescence are tuned by controlling the ligation of the metal (IrIII or PtII) with the carbon atom at the 2 or 3 position of the carbazole unit. Highly efficient OLED devices using the complexes as phosphorescent dopants have been achieved (see figure).

  5. Index

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Full Papers
    6. Index

SEARCH

SEARCH BY CITATION