Advanced Functional Materials

Cover image for Vol. 17 Issue 16

November, 2007

Volume 17, Issue 16

Pages 3009–3385

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Full Papers
    7. Index
    1. Cover Picture: Preparation and Application of Novel Microspheres Possessing Autofluorescent Properties (Adv. Funct. Mater. 16/2007)

      W. Wei, L.-Y. Wang, L. Yuan, Q. Wei, X.-D. Yang, Z.-G. Su and G.-H. Ma

      Article first published online: 29 OCT 2007 | DOI: 10.1002/adfm.200790054

      Thumbnail image of graphical abstract

      Autofluorescent chitosan microspheres with tunable color are developed based on different crosslinking reagents and further chemical modification. The fluorescent intensity can also be controlled by the particle size and crosslinking degree. The autofluorescent microspheres may be useful in fluorescence assays as bright, inexpensive, and stable probes for qualitative and quantitative studies of biological interactions and drug delivery.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Full Papers
    7. Index
    1. Inside Front Cover: Thermally Responsive Biomineralization on Biodegradable Substrates (Adv. Funct. Mater. 16/2007)

      J. Shi, N. M. Alves and J. F. Mano

      Article first published online: 29 OCT 2007 | DOI: 10.1002/adfm.200790055

      Thumbnail image of graphical abstract

      A bioactive substrate is modified with a thermoresponsive polymer. Apatite deposits onto the surface upon immersion in simulated body fluid at 37 °C but not at room temperature (see figure). By controlling the material on the microstructural level, it is possible to induce calcification only in patterned regions.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Full Papers
    7. Index
    1. Contents: Adv. Funct. Mater. 16/2007 (pages 3009–3023)

      Article first published online: 29 OCT 2007 | DOI: 10.1002/adfm.200790052

  4. Feature Article

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Full Papers
    7. Index
    1. 3D Micro- and Nanostructures via Interference Lithography (pages 3027–3041)

      J.-H. Jang, C. K. Ullal, M. Maldovan, T. Gorishnyy, S. Kooi, C. Koh and E. L. Thomas

      Article first published online: 5 OCT 2007 | DOI: 10.1002/adfm.200700140

      Thumbnail image of graphical abstract

      Interference lithography (IL) is a promising technique for rapidly and cheaply fabricating large-area, defect-free 3D structures on the sub-micrometer scale. This Feature Article provides an overview of several aspects of the fabrication of 3D structures via IL and highlights some of our recent efforts in the applications of these 3D structures in photonic crystals, phononic crystals, and as microframes, and for the synthesis of highly nonspherical polymer particles.

  5. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Feature Article
    6. Full Papers
    7. Index
    1. Dendrimer-Functionalized Iron Oxide Nanoparticles for Specific Targeting and Imaging of Cancer Cells (pages 3043–3050)

      S. H. Wang, X. Shi, M. Van Antwerp, Z. Cao, S. D. Swanson, X. Bi and J. R. Baker Jr.

      Article first published online: 31 AUG 2007 | DOI: 10.1002/adfm.200601139

      Thumbnail image of graphical abstract

      Dendrimer-functionalized iron oxide nanoparticles are fabricated by a unique approach that combines a layer-by-layer self-assembly technique with dendrimer chemistry. In vitro flow cytometry, confocal microscopy, transmission electron microscopy, and magnetic resonance imaging (see figure) results show that these multifunctional nanoparticles can specifically target cancer cells overexpressing folate receptors.

    2. Printable Single-Crystal Silicon Micro/Nanoscale Ribbons, Platelets and Bars Generated from Bulk Wafers (pages 3051–3062)

      A. J. Baca, M. A. Meitl, H. C. Ko, S. Mack, H.-S. Kim, J. Dong, P. M. Ferreira and J. A. Rogers

      Article first published online: 28 AUG 2007 | DOI: 10.1002/adfm.200601161

      Thumbnail image of graphical abstract

      Top down lithographic patterning and anisotropic etching of Si (111) wafers can generate single-crystal silicon ribbons, platelets and bars having dimensions between 100 nm and several centimeters (see figure). Bendable thin-film type transistors demonstrate one class of application possibility.

    3. A Blue-Light-Emitting Polymer with a Rigid Backbone for Enhanced Color Stability (pages 3063–3068)

      S. H. Park, Y. Jin, J. Y. Kim, S. H. Kim, J. Kim, H. Suh and K. Lee

      Article first published online: 31 AUG 2007 | DOI: 10.1002/adfm.200700339

      Thumbnail image of graphical abstract

      A new class of blue-emitting polymers is successfully demonstrated by modifying the chemical structure of poly(fluorene) to inhibit the formation of keto defects (see figure). This innovative approach leads to a blue-light-emitting polymer with remarkable color stability.

    4. Highly Stretchable and Conductive Polymer Material Made from Poly(3,4-ethylenedioxythiophene) and Polyurethane Elastomers (pages 3069–3073)

      T. S. Hansen, K. West, O. Hassager and N. B. Larsen

      Article first published online: 31 AUG 2007 | DOI: 10.1002/adfm.200601243

      Thumbnail image of graphical abstract

      Elastomeric conducting polymers with high conductivity and stretchabiliy result from facile blending of commercial PEDOT and polyurethane. The method, mechanisms, and limits are presented and analyzed. Repeated elongations by 50% result in small, reproducible reductions in conductance. Substantial conductivity is retained at 200% elongation.

    5. Printable All-Organic Electrochromic Active-Matrix Displays (pages 3074–3082)

      P. Andersson, R. Forchheimer, P. Tehrani and M. Berggren

      Article first published online: 31 AUG 2007 | DOI: 10.1002/adfm.200601241

      Thumbnail image of graphical abstract

      A holistic approach to improve fill factor, color contrast, and updating procedures of all-organic electrochromic active-matrix displays is reported. Further, the simplified electrochemical smart pixel design yields a robust technology that paves the way for roll-to-roll manufacturing of low-voltage operating flexible displays utilizing standard printing techniques.

    6. High Electroactivity of Polyaniline in Supercapacitors by Using a Hierarchically Porous Carbon Monolith as a Support (pages 3083–3087)

      L.-Z. Fan, Y.-S. Hu, J. Maier, P. Adelhelm, B. Smarsly and M. Antonietti

      Article first published online: 31 AUG 2007 | DOI: 10.1002/adfm.200700518

      Thumbnail image of graphical abstract

      A high-performance polyaniline electrode was prepared by deposition of aniline on a hierarchically porous carbon monolith (HPCM; see figure). Many of the advantages can be attributed to the backbone role of HPCM. This electrode is characterized by high specific capacitance, high power and energy density, high stability, and low cost, making it very promising for use in supercapacitors.

    7. Structural Changes in the BODIPY Dye PM567 Enhancing the Laser Action in Liquid and Solid Media (pages 3088–3098)

      I. García-Moreno, F. Amat-Guerri, M. Liras, A. Costela, L. Infantes, R. Sastre, F. López Arbeloa, J. Bañuelos Prieto and Í. López Arbeloa

      Article first published online: 5 SEP 2007 | DOI: 10.1002/adfm.200601103

      Thumbnail image of graphical abstract

      The double covalent linkage of an emitting BODIPY chromophore to a poly(methyl methacrylate) matrix (see scheme) considerably increases the efficiency and the photostability of its laser action, with regard to the corresponding free dye as a solid solution in the same polymer.

    8. AuPt Alloy Nanoparticles for CO-Tolerant Hydrogen Activation: Architectural Effects in Au-Pt Bimetallic Nanocatalysts (pages 3099–3104)

      S. Zhou, G. S. Jackson and B. Eichhorn

      Article first published online: 5 SEP 2007 | DOI: 10.1002/adfm.200700216

      Thumbnail image of graphical abstract

      Metastable AuPt alloy nanoparticles and nanowires were prepared from a rapid butyllithium reduction method. The supported alloy particles are far superior to Au-Pt contact aggregates and monometallic mixtures for use as CO-tolerant hydrogen oxidation catalysts (see figure).

    9. Patterning Semiconductor Nanocrystals in Polymer Films (pages 3105–3110)

      C. Paquet and E. Kumacheva

      Article first published online: 11 SEP 2007 | DOI: 10.1002/adfm.200700409

      Thumbnail image of graphical abstract

      A method of patterning semiconductor nanocrystals (NCs) in a polymer film is reported. By combining lithographic concept with polymerization-induced phase separation in a NC-monomer mixture, we produced topographic and lateral compositional patterns in NC-polymer films. The quality of the patterns was controlled by the competition between the rate of polymerization-induced phase separation and the change in viscosity of the polymerizing mixture.

    10. Direct Ink-Jet Printing of Ag–Cu Nanoparticle and Ag-Precursor Based Electrodes for OFET Applications (pages 3111–3118)

      S. Gamerith, A. Klug, H. Scheiber, U. Scherf, E. Moderegger and E. J. W. List

      Article first published online: 11 SEP 2007 | DOI: 10.1002/adfm.200600762

      Thumbnail image of graphical abstract

      Properties and applications of inkjet printable metal-containing inks with low conversion temperatures are discussed. The presented materials are compatible with organic electronics and enable the fabrication of all-solution processed organic field-effect transistors with metal electrodes.

    11. Confocal Raman Spectroscopy of α-Sexithiophene: From Bulk Crystals to Field-Effect Transistors (pages 3119–3127)

      A. Brillante, I. Bilotti, C. Albonetti, J.-F. Moulin, P. Stoliar, F. Biscarini and D. M. de Leeuw

      Article first published online: 11 SEP 2007 | DOI: 10.1002/adfm.200700004

      Thumbnail image of graphical abstract

      Confocal Raman microscopy is applied to T6 bulk crystals, thin films, and microfabricated test patterns for applications in FET technology. Raman maps are complemented by AFM images (see figure). This joint contribution provides a powerful method to probe phase mixing. This is of paramount importance since phase purity is a strict requirement in the sample preparation of organic semiconductors, whose carrier mobility strongly depends on crystal structure.

    12. Investigation on the Low Luminous Efficiency in a Polymer Light-Emitting Diode with a High Work-function Cathode by Soft Contact Lamination** (pages 3128–3133)

      T.-W. Lee

      Article first published online: 20 SEP 2007 | DOI: 10.1002/adfm.200700490

      Thumbnail image of graphical abstract

      The main origin of the low luminous efficiency in hole-dominant polymer light-emitting diodes is investigated by using a soft contact lamination technique to form electrical contacts on top of the emissive layer. The top electrode is chemically modified with self-assembled monolayers to act as an interfacial spacer layer between the emitting layer and the cathode.

    13. Thermosensitive Nanostructures Comprising Gold Nanoparticles Grafted with Block Copolymers (pages 3134–3140)

      D. Li, Y. Cui, K. Wang, Q. He, X. Yan and J. Li

      Article first published online: 20 SEP 2007 | DOI: 10.1002/adfm.200700427

      Thumbnail image of graphical abstract

      Intelligent nanocomposites consisting of gold nanoparticles and a block copolymer display a well-defined core/shell nanostructure and exhibit two thermosensitive transition points corresponding to thermal responses of the inner homopolymer and outer copolymer components (see figure). Silver nanoparticles embedded in weakly crosslinked shells have a thermally modulated catalytic activity as heterogeneous catalysts.

    14. Highly Efficient Non-Doped Blue-Light-Emitting Diodes Based on an Anthrancene Derivative End-Capped with Tetraphenylethylene Groups (pages 3141–3146)

      P.-I Shih, C.-Y. Chuang, C.-H. Chien, E. W.-G. Diau and C.-F. Shu

      Article first published online: 20 SEP 2007 | DOI: 10.1002/adfm.200700355

      Thumbnail image of graphical abstract

      Non-doped blue electroluminescent devices based on a morphologically stable, blue-emitting material, TPVAn, which contains a tert-butyl-9,10-diphenylanthracene core end-capped with two tetraphenylethylene groups, exhibit the finest performance of non-doped deep blue-emitting OLEDs to date: external quantum efficiencies as high as 5.3% (5.3 cd/A) with CIE coordinates located at (0.14, 0.12).

    15. Controlled Release and Absorption Resonance of Fluorescent Silica-Coated Platinum Nanoparticles (pages 3147–3152)

      S. Liu, Y. Wong, Y. Wang, D. Wang and M.-Y. Han

      Article first published online: 4 OCT 2007 | DOI: 10.1002/adfm.200700148

      Thumbnail image of graphical abstract

      An aggregation-driven growth of uniform platinum nanoparticles has been developed, and the exclusive silica-coating and dye-incorporation of the resulting platinum nanoparticles have been further achieved for thermal-responsive controlled release of guest molecules and size-sensitive absorbance resonance investigations.

    16. Preparation and Application of Novel Microspheres Possessing Autofluorescent Properties (pages 3153–3158)

      W. Wei, L.-Y. Wang, L. Yuan, Q. Wei, X.-D. Yang, Z.-G. Su and G.-H. Ma

      Article first published online: 4 OCT 2007 | DOI: 10.1002/adfm.200700274

      Thumbnail image of graphical abstract

      Autofluorescent chitosan microspheres with tunable color are developed based on different crosslinking reagents and further chemical modification. The fluorescent intensity can also be controlled by the particle size and crosslinking degree. The autofluorescent microspheres may be useful in fluorescence assays as bright, inexpensive, and stable probes for qualitative and quantitative studies of biological interactions and drug delivery.

    17. Solvent Dependent Shape and Magnetic Properties of Doped ZnO Nanostructures (pages 3159–3169)

      G. Clavel, M.-G. Willinger, D. Zitoun and N. Pinna

      Article first published online: 31 AUG 2007 | DOI: 10.1002/adfm.200601142

      Thumbnail image of graphical abstract

      The solvothermal synthesis involving the reaction of zinc and cobalt acetate or manganese oleate with benzyl alcohol leads to pure inorganic nanoparticles that are diluted magnetic semiconductors. Depending on the synthesis conditions cobalt doped particles are paramagnetic or ferromagnetic at room temperature.

    18. Studies of the Temperature and Frequency Dependent Impedance of an Electroceramic Functional Oxide NTC Thermistor (pages 3170–3174)

      R. Schmidt and A. W. Brinkman

      Article first published online: 31 AUG 2007 | DOI: 10.1002/adfm.200600878

      Thumbnail image of graphical abstract

      The temperature dependent complex impedance spectra of polycrystalline NTC thermistor devices are dominated by one single relaxation. A small electrode interface relaxation is present also, and both contributions can be fitted with an equivalent circuit model based on parallel resistor – capacitor combinations.

    19. Nanoparticle Coating for Advanced Optical, Mechanical and Rheological Properties (pages 3175–3181)

      L. F. Hakim, D. M. King, Y. Zhou, C. J. Gump, S. M. George and A. W. Weimer

      Article first published online: 31 AUG 2007 | DOI: 10.1002/adfm.200600877

      Thumbnail image of graphical abstract

      Primary titania nanoparticles were conformally coated with ultrathin alumina films using atomic layer deposition. Coated particles showed enhanced optical (suppressed surface photocatalytic activity), mechanical (increased hardness of sintered parts), and rheological (decreased viscosity of nanoparticle suspensions) properties

    20. Assembly of Nanoparticle Patterns with Single-Particle Resolution Using DNA-Mediated Charge Trapping Technique: Method and Applications (pages 3182–3186)

      H.-Y. Lin, L.-C. Tsai and C.-D. Chen

      Article first published online: 29 AUG 2007 | DOI: 10.1002/adfm.200601180

      Thumbnail image of graphical abstract

      Gold nanoparticle chains produced by Coulomb attraction of biotinated DNA molecules and attachment of nanoparticles. The underneath charge patterns are generated by a focused e-beam source with accurate position and dose control. The chains can serve as interconnecting wires as well as single-electron transistors.

    21. Spatially Localized Formation of InAs Quantum Dots on Shallow Patterns Regardless of Crystallographic Directions (pages 3187–3193)

      J. H. Lee, Z. M. Wang, W. T. Black, V. P. Kunets, Y. I. Mazur and G. J. Salamo

      Article first published online: 29 AUG 2007 | DOI: 10.1002/adfm.200700066

      Thumbnail image of graphical abstract

      Localization of quantum dots on shallow patterns regardless of crystallographic directions was achieved by combining low temperature oxide desorption and shallow GaAs buffer layer growth. Due to the high density of monolayer steps on the vicinal surfaces, adatoms preferentially incorporate on the edge of monolayer steps.

    22. Efficient Deep-Blue Organic Light-Emitting Diodes: Arylamine-Substituted Oligofluorenes (pages 3194–3199)

      Z. Q. Gao, Z. H. Li, P. F. Xia, M. S. Wong, K. W. Cheah and C. H. Chen

      Article first published online: 31 AUG 2007 | DOI: 10.1002/adfm.200700238

      Thumbnail image of graphical abstract

      Diphenylamino end-capped terfluorene (see figure) is used to make a highly efficient deep-blue organic light-emitting diode. The device exhibits a maximum current efficiency of 2.9 cd A–1 at 2 mA cm–2 (external quantum efficiency of 4.1 %) with Commission Internationale de l'Éclairage (CIE) coordinates of (0.152,0.08), which is very close to the National Television System Committee standard blue.

    23. Novel Nano-Structured Silica-Based Electrolytes Containing Quaternary Ammonium Iodide Moieties (pages 3200–3206)

      S. Cerneaux, S. M. Zakeeruddin, J. M. Pringle, Y.-B. Cheng, M. Grätzel and L. Spiccia

      Article first published online: 5 SEP 2007 | DOI: 10.1002/adfm.200700391

      Thumbnail image of graphical abstract

      A new family of nanosized silica-based quaternary ammonium iodide salts have been synthesized and applied as iodide sources in the Dye Sensitized Solar Cells, yielding high efficiencies at low irradiance and indicating their suitability for use in devices for indoor applications.

    24. Correlations between Percolation Threshold, Dispersion State, and Aspect Ratio of Carbon Nanotubes (pages 3207–3215)

      J. Li, P. C. Ma, W. S. Chow, C. K. To, B. Z. Tang and J.-K. Kim

      Article first published online: 5 SEP 2007 | DOI: 10.1002/adfm.200700065

      Thumbnail image of graphical abstract

      Experiments and modeling are used to study the effect of carbon nanotube (CNT) dispersions and aspect ratios on the percolation threshold of CNT–polymer nanocomposites. Four different processing conditions are used to achieve mixtures of individual CNTs and entangled bundles (see figure), and their electrical properties are characterized.

    25. Soft Mechanical Sensors Through Reverse Actuation in Polypyrrole (pages 3216–3222)

      Y. Wu, G. Alici, J. D. W. Madden, G. M. Spinks and G. G. Wallace

      Article first published online: 5 SEP 2007 | DOI: 10.1002/adfm.200700060

      Thumbnail image of graphical abstract

      Mechanical bend sensors have been developed using the conducting polymer polypyrrole. These soft sensors generate mV outputs for mm tip displacements. The mechanism of the sensor response has been investigated and found to be a “reverse actuation”. Mobile dopant ions move between the polymer and the surrounding electrolyte due to strain-induced volume changes. The sensors operate in air and can be potentially miniaturized for biomedical or robotic applications.

    26. A Molecularly Imprinted Copolymer Designed for Enantioselective Recognition of Glutamic Acid (pages 3223–3230)

      R. Ouyang, J. Lei, H. Ju and Y. Xue

      Article first published online: 5 SEP 2007 | DOI: 10.1002/adfm.200700143

      Thumbnail image of graphical abstract

      An electrosynthesized copolymer of o-phenylenediamine and dopamine was first designed for recognition of glutamic acid (Glu) by a molecular imprinting technique, which leads to sensitive and enantioselective capacitive sensing of L- and D-Glu enantiomers.

    27. Photophysical Properties of a Series of Poly(ladder-type phenylene)s (pages 3231–3240)

      F. Laquai, A. K. Mishra, M. R. Ribas, A. Petrozza, J. Jacob, L. Akcelrud, K. Müllen, R. H. Friend and G. Wegner

      Article first published online: 31 AUG 2007 | DOI: 10.1002/adfm.200700450

      Thumbnail image of graphical abstract

      Fluorescence, phosphorescence, photoinduced absorption (PIA) and amplified spontaneous emission (ASE) of a series of poly(ladder-type phenylene)s are investigated using time-resolved photoluminescence spectroscopy. The results are interpreted with respect to the length of the monomer units, which varies within the series of polymers from two to five bridged phenyl rings.

    28. Periodically Ordered Meso- and Macroporous SiO2 Thin Films and Their Induced Electrochemical Activity as a Function of Pore Hierarchy (pages 3241–3250)

      O. Sel, S. Sallard, T. Brezesinski, J. Rathouský, D. R. Dunphy, A. Collord and B. M. Smarsly

      Article first published online: 11 SEP 2007 | DOI: 10.1002/adfm.200700079

      Thumbnail image of graphical abstract

      Silica thin films with variable pore hierarchy are produced via self-assembly. Mesopores are generated by using porogens, and PMMA particles are used as macrotemplate. The films are post-synthetically silylated, followed by grafting of electrochemically active ferrocene groups onto the pore walls. The induced electrochemical activity (see figure) as a function of variations in the pore hierarchy is characterized by cyclic voltammetry. The multimodal pore systems possess a relatively higher electrochemical response owing to a better connection between the pores and higher surface area.

    29. Very Long SiC-Based Coaxial Nanocables with Tunable Chemical Composition (pages 3251–3257)

      M. Bechelany, A. Brioude, P. Stadelmann, G. Ferro, D. Cornu and P. Miele

      Article first published online: 11 SEP 2007 | DOI: 10.1002/adfm.200700110

      Thumbnail image of graphical abstract

      A simple process for the fabrication of very long SiC-based coaxial nanocables is presented. These nanocables feature a SiC core and are encapsulated by an outer layer of silica, carbon, or boron nitride (see figure). The as-grown material has the macroscopic behavior of a self-supported felt of nanowires.

    30. Formation of Gold and Silver Nanoparticle Arrays and Thin Shells on Mesostructured Silica Nanofibers (pages 3258–3266)

      S. Zhang, W. Ni, X. Kou, M. H. Yeung, L. Sun, J. Wang and C. Yan

      Article first published online: 11 SEP 2007 | DOI: 10.1002/adfm.200700366

      Thumbnail image of graphical abstract

      Mesostructured silica nanofibers are used as templates to prepare noble- metal-nanoparticle/nanofiber hybrid nanostructures (see figure). These hybrid nanostructures exhibit surface plasmon resonance features distinct from the resonances associated with noble metal nanoparticles in solution, and they can function as substrates for surface-enhanced Raman spectroscopy.

    31. Transparent Nanometric Cubic and Tetragonal Zirconia Obtained by High-Pressure Pulsed Electric Current Sintering (pages 3267–3273)

      U. Anselmi-Tamburini, J. N. Woolman and Z. A. Munir

      Article first published online: 11 SEP 2007 | DOI: 10.1002/adfm.200600959

      Thumbnail image of graphical abstract

      Transparent cubic zirconia (8 mol % yttria): 1 mm thick sample with grain size of 50 nm consolidated by field activated sintering at 1000 °C under a pressure of 600 MPa. The transparency of this sample is about 80 % of the theoretical value. Increasing the pressure during consolidation increased transparency without increasing grain size. Generally similar results were obtained for the tetragonal modification of YSZ (3 mol % yttria).

    32. Organic Field-Effect Devices as Tool to Characterize the Bipolar Transport in Polymer-Fullerene Blends: The Case of P3HT-PCBM (pages 3274–3283)

      M. Morana, P. Koers, C. Waldauf, M. Koppe, D. Muehlbacher, P. Denk, M. Scharber, D. Waller and C. Brabec

      Article first published online: 11 SEP 2007 | DOI: 10.1002/adfm.200700124

      Thumbnail image of graphical abstract

      Organic field-effect devices are used to characterize the bipolar charge transport in P3HT-PCBM bulk-heterojunctions. The results correlate with the filling factor of solar cells and follow the prediction of a device model based only on the charge carrier drift under the built-in electric field.

    33. Chalcogenide Glasses Based on Germanium Disulfide for Second Harmonic Generation (pages 3284–3294)

      M. Guignard, V. Nazabal, F. Smektala, J.-L. Adam, O. Bohnke, C. Duverger, A. Moréac, H. Zeghlache, A. Kudlinski, G. Martinelli and Y. Quiquempois

      Article first published online: 11 SEP 2007 | DOI: 10.1002/adfm.200700047

      Thumbnail image of graphical abstract

      High second-order susceptibilities were created by thermal poling in bulk germanium disulfide based chalcogenide glasses. The second-order nonlinear signals were recorded by using a Maker fringes experiment (see figure), and a second-order coefficient χ(2) up to 8 pm V–1 was measured in Ge25Sb10S65 glass. Migration of Na+ ions towards the cathode may be responsible for the creation of a second-order nonlinearity in this sulfide glass.

    34. Shape-Selective Synthesis of Gold Nanoparticles with Controlled Sizes, Shapes, and Plasmon Resonances (pages 3295–3303)

      J. Zhang, H. Liu, Z. Wang and N. Ming

      Article first published online: 20 SEP 2007 | DOI: 10.1002/adfm.200700497

      Thumbnail image of graphical abstract

      Remarkable gold nanostructures are prepared in various shapes such as octahedra, triangles, rods, hexagons, belts, dumbbells, and polyhedra using a novel water/poly(vinylpyrrolidone) (PVP)/n-pentanol system (the figure shows a representative example). This solvent system gives rise to the region-selective distribution of water and PVP, which confines the synthesis of Au nanostructures along the PVP surface and alters the adsorption behavior and/or the reducing ability of PVP.

    35. Hydrolytically Stable Phosphorylated Hybrid Silicas for Proton Conduction (pages 3304–3311)

      Y. G. Jin, S. Z. Qiao, J. C. D. da Costa, B. J. Wood, B. P. Ladewig and G. Q. Lu

      Article first published online: 20 SEP 2007 | DOI: 10.1002/adfm.200700350

      Thumbnail image of graphical abstract

      A series of novel proton conductors with hydrolytically stable phosphonic acid functionalization have been newly prepared from the sol–gel derived hybrid silicas, which show practically important and promising characteristics for the application to intermediate temperature proton exchange membrane fuel cells, especially under near saturated humidity conditions.

    36. Thermally Responsive Biomineralization on Biodegradable Substrates (pages 3312–3318)

      J. Shi, N. M. Alves and J. F. Mano

      Article first published online: 20 SEP 2007 | DOI: 10.1002/adfm.200601206

      Thumbnail image of graphical abstract

      A bioactive substrate is modified with a thermoresponsive polymer. Apatite deposits onto the surface upon immersion in simulated body fluid at 37 °C but not at room temperature (see figure). By controlling the material on the microstructural level, it is possible to induce calcification only in patterned regions.

    37. High Performance Polymer Electrophosphorescent Devices with tert-Butyl Group Modified Iridium Complexes as Emitters (pages 3319–3325)

      X. Wei, J. Peng, J. Cheng, M. Xie, Z. Lu, C. Li and Y. Cao

      Article first published online: 20 SEP 2007 | DOI: 10.1002/adfm.200700359

      Thumbnail image of graphical abstract

      Modifying ligands of iridium complexes with bulky tert-butyl substituents results in shortened phosphorescent lifetimes, good PL and EL efficiencies. The chelates have much more broadened EL spectra with FWHM of >110 nm compared to their PL spectra (see figure).

    38. Soluble Phenanthrenyl-Imidazole-Presenting Regioregular Poly(3-octylthiophene) Copolymers Having Tunable Bandgaps for Solar Cell Applications (pages 3326–3331)

      Y.-T. Chang, S.-L. Hsu, M.-H. Su and K.-H. Wei

      Article first published online: 20 SEP 2007 | DOI: 10.1002/adfm.200700423

      Thumbnail image of graphical abstract

      A new family of regioregular copoly(3-octylthiophene) with side-chain-tethered phenanthrenyl–imidazole moieties (see figure) that possess a lowered bandgap and enhanced electron-transfer properties are synthesized for heterojunction polymer/PCBM solar-cell applications. The short circuit current density and power conversion efficiency of the copolymer having 80 mol % phenanthrenyl–imidazole group device are shown to be improved over pure poly(3-octylthiophene).

    39. Characterization of Geoinspired and Synthetic Chrysotile Nanotubes by Atomic Force Microscopy and Transmission Electron Microscopy (pages 3332–3338)

      S. Piperno, I. Kaplan-Ashiri, S. R. Cohen, R. Popovitz-Biro, H. D. Wagner, R. Tenne, E. Foresti, I. G. Lesci and N. Roveri

      Article first published online: 20 SEP 2007 | DOI: 10.1002/adfm.200700278

      Thumbnail image of graphical abstract

      The structural and mechanical properties of geoinspired synthetic chrysotile nanotubes (see figure) are studied in both stoichiometric and 0.67 wt % Fe-doped forms. It is demonstrated that doping induces structural modifications and alters the Young's modulus value as well.

    40. Synthesis of New RuO2@SiO2 Composite Nanomaterials and their Application as Catalytic Filters for Selective Gas Detection (pages 3339–3347)

      S. Jansat, K. Pelzer, J. García-Antón, R. Raucoules, K. Philippot, A. Maisonnat, B. Chaudret, Y. Guari, A. Mehdi, C. Reyé and R. J. P. Corriu

      Article first published online: 4 OCT 2007 | DOI: 10.1002/adfm.200700519

      Thumbnail image of graphical abstract

      RuO2@SiO2 nanomaterials are prepared using organized hybrid mesostructured silica by anchoring the metal precursor. The resulting materials are evaluated as catalytic filters when deposited onto gas sensors for the preferential detection of propane in a multicomponent gas mixture of propane, carbon monoxide, and nitrogen dioxide (see figure).

    41. Nanostructured Titanium Oxynitride Porous Thin Films as Efficient Visible-Active Photocatalysts (pages 3348–3354)

      E. Martínez-Ferrero, Y. Sakatani, C. Boissière, D. Grosso, A. Fuertes, J. Fraxedas and C. Sanchez

      Article first published online: 4 OCT 2007 | DOI: 10.1002/adfm.200700396

      Thumbnail image of graphical abstract

      The introduction of nitrogen into titania at higher temperatures leads to the formation of TiN (TiN1–xOx), which results in nanocrystalline mesoporous N-doped titania films (see figure). The structure of the films is investigated and their photocatalytic activity under visible-light excitation is examined.

    42. Frontal Polymerization Synthesis of Monolithic Macroporous Polymers (pages 3355–3362)

      Q. Z. Yan, G. D. Lu, W. F. Zhang, X. H. Ma and C. C. Ge

      Article first published online: 4 OCT 2007 | DOI: 10.1002/adfm.200600596

      Thumbnail image of graphical abstract

      Both hydrophilic and hydrophobic porous monolithic materials are synthesized by frontal polymerization. For acrylamide monoliths, open and interconnected porous polymers with a honeycomb cell morphology are formed. For N-isopropylacrylamide, styrene (see figure), and methyl methacrylate monoliths, beadlike, continuous, macroporous networks are observed.

    43. Elaboration of P3HT/CNT/PCBM Composites for Organic Photovoltaic Cells (pages 3363–3370)

      S. Berson, R. de Bettignies, S. Bailly, S. Guillerez and B. Jousselme

      Article first published online: 4 OCT 2007 | DOI: 10.1002/adfm.200700438

      Thumbnail image of graphical abstract

      Blends of single-walled and multi-walled carbon nanotubes with P3HT/PCBM (where P3HT is regioregular poly(3-hexylthiophene and PCBM is a fullerene derivative 1-(3-methoxycarbonyl) propyl-1-phenyl[6,6]C61), obtained from a high dilution and concentration process, are cast using spin coating. The films are characterized by atomic force microscopy and spectroscopy and tested on photovoltaic cell devices.

    44. Growth of Magnetic Yard-Glass Shaped Boron Nitride Nanotubes with Periodic Iron Nanoparticles (pages 3371–3376)

      Z.-G. Chen, J. Zou, F. Li, G. Liu, D.-M. Tang, D. Li, C. Liu, X. Ma, H.-M. Cheng, G. Q. Lu and Z. Zhang

      Article first published online: 4 OCT 2007 | DOI: 10.1002/adfm.200700296

      Thumbnail image of graphical abstract

      Novel yard-glass shaped boron nitride nanotubes (YG-BNNTs) periodically filled with Fe nanoparticles were synthesized by a catalytic reaction process of ammonia with boron precursors. As they show excellent ferromagnetic property at room temperature with superior chemical stability, it can be used in rigorous environments for nano-scaled magnetic devices.

    45. Poly(N-isopropylacrylamide) Interfaces with Dissimilar Thermo-responsive Behavior for Controlling Ion Permeation and Immobilization (pages 3377–3382)

      J. Zhou, J. Liu, G. Wang, X. Lu, Z. Wen and J. Li

      Article first published online: 4 OCT 2007 | DOI: 10.1002/adfm.200700286

      Thumbnail image of graphical abstract

      Stimuli-responsive poly(N-isopropylacrylamide) chain- and porous gel-modified interfaces are controllably synthesized by simply altering the synthesis conditions. Owing to their different structures, the tethered chain-modified interface shows ON/OFF switching, whereas the gel interface displays a ‘breathing in' behavior for immobilization.

  6. Index

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

SEARCH

SEARCH BY CITATION