Advanced Functional Materials

Cover image for Vol. 18 Issue 14

July 23, 2008

Volume 18, Issue 14

Pages 2001–2134

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Index
    1. Cover Picture: Microwave Arcing Induced Formation and Growth Mechanisms of Core/Shell Metal/Carbon Nanoparticles in Organic Solutions (Adv. Funct. Mater. 14/2008)

      Yu-Lin Hsin, Chia-Fen Lin, Yu-Chia Liang, Kuo Chu Hwang, Jia-Cherng Horng, Ja-an Annie Ho, Chun-Cheng Lin and Jih Ru Hwu

      Article first published online: 17 JUL 2008 | DOI: 10.1002/adfm.200890055

      Thumbnail image of graphical abstract

      Well-graphitized core/shell metal/carbon nanoparticles were prepared in organic solutions using a facile microwave-arcing method in domestic microwave ovens, as reported by Kuo Chu Hwang and coworkers on page 2048. Microwave arcing created by absorption of microwaves by short metal wires in organic solutions causes thermal pyrolysis of metallocene precursors to generate core/shell metal/carbon nanoparticles. The presence of fullerenes (C60/70) was crucial to the formation of well-graphitized graphene shells. Hollow carbon nanoparticles can also be prepared in a similar way.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Index
    1. Inside Front Cover: Directed Self-Assembly of Gradient Concentric Carbon Nanotube Rings (Adv. Funct. Mater. 14/2008)

      Suck Won Hong, Wonje Jeong, Hyunhyub Ko, Michael R. Kessler, Vladimir V. Tsukruk and Zhiqun Lin

      Article first published online: 18 JUL 2008 | DOI: 10.1002/adfm.200890056

      Thumbnail image of graphical abstract

      Gradient concentric rings of multiwalled carbon nanotubes (MWNTs) with controlled density over very large areas were achieved by directed self-assembly of the MWNT water solution using a polymeric ring template that was produced by controlled “stick-slip” motions of the contact line in a confined geometry consisting of a sphere on a flat substrate (i.e., sphere-on-flat geometry), as reported by Zhiqun Lin and coworkers on page 2114. The spacing, width, and height of MWNT rings can be finely tailored by using different casting methods. This facile technique opens up a new avenue for high-throughput patterning of microscopic carbon nanotube rings over large area without the need for lithography or an external field.

  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. 14/2008) (pages 2001–2004)

      Article first published online: 18 JUL 2008 | DOI: 10.1002/adfm.200890057

  4. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Full Papers
    6. Index
    1. Optical Properties and Growth Aspects of Silver Nanoprisms Produced by a Highly Reproducible and Rapid Synthesis at Room Temperature (pages 2005–2016)

      Damian Aherne, Deirdre M. Ledwith, Matthew Gara and John M. Kelly

      Article first published online: 9 JUL 2008 | DOI: 10.1002/adfm.200800233

      Thumbnail image of graphical abstract

      A seed-based method for the production of silver nanoprisms is presented. Analysis of the UV-vis spectra of samples of a range of sizes indicates that there is very little radiation damping of the plasmon resonance. A study of the lamellar defect structure has uncovered a transformation of the crystal structure from fcc to hcp in the vicinity of the defects. A new understanding of the mechanisms behind anisotropic growth in silver nanoprisms is proposed.

    2. Synthetic Strategies for Hybrid Materials to Improve Properties for Optoelectronic Applications (pages 2017–2025)

      Olga García, Leoncio Garrido, Roberto Sastre, Angel Costela and Inmaculada García-Moreno

      Article first published online: 25 JUN 2008 | DOI: 10.1002/adfm.200701395

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      The direct influence of the synthetic protocol on the design and development of organic/inorganic hybrid materials with advanced and innovative applications, especially in the optoelectronic fields, is fully assessed. The control of both the neutralization reaction and the hydrolysis time is found to be a determining factor for the enhancement of the laser action of dyes incorporated into hydrid-matrix active media for solid-state dye lasers.

    3. A Unique Processable Green Polymer with a Transmissive Oxidized State for Realization of Potential RGB-Based Electrochromic Device Applications (pages 2026–2030)

      Gorkem E. Gunbas, Asuman Durmus and Levent Toppare

      Article first published online: 9 JUL 2008 | DOI: 10.1002/adfm.200701386

      Thumbnail image of graphical abstract

      The synthesis of one of the first processable green polymers with a transmissive oxidized state is reported. The polymer revealed superior optical contrast in the visible region with fast switching times and high stability. Hence, this material is a outstanding candidate for completion of the red–green–blue (RGB) color space.

    4. One-Step Synthesis of Conducting Polymer–Noble Metal Nanoparticle Composites using an Ionic Liquid (pages 2031–2040)

      Jennifer M. Pringle, Orawan Winther-Jensen (née Ngamna), Carol Lynam, Gordon G. Wallace, Maria Forsyth and Douglas R. MacFarlane

      Article first published online: 9 JUL 2008 | DOI: 10.1002/adfm.200701147

      Thumbnail image of graphical abstract

      Poly(terthiophene)- and poly(pyrrole)–gold nanocomposites were prepared in one step using an ionic liquid solution of gold chloride as the oxidant, to achieve incorporation of metallic gold into the polymer. This technique has been extended to the synthesis of poly(pyrrole)-silver nanocomposites as shown in the figure.

    5. Fibrillar Constructs from Multilevel Hierarchical Self-Assembly of Discotic and Calamitic Supramolecular Motifs (pages 2041–2047)

      Nikolay Houbenov, Antti Nykänen, Hermis Iatrou, Nikos Hadjichristidis, Janne Ruokolainen, Charl F. J. Faul and Olli Ikkala

      Article first published online: 18 JUL 2008 | DOI: 10.1002/adfm.200800384

      Thumbnail image of graphical abstract

      Six-level hierarchical self-assembly is achieved by combining several concepts, that is, block copolymer self-assembly, rod-like helical and disc-like liquid crystallinity, DNA-like interactions and packing frustration to construct mesoscale fibrils. The packing frustration between the helical rods and the discotic motif limits the lateral growth of the assembly affording mesoscale fibrils, forming an open fibrillar network.

      Corrected by:

      Correction: Fibrillar Constructs from Multilevel Hierarchical Self-Assembly of Discotic and Calamitic Supramolecular Motifs

      Vol. 18, Issue 17, Article first published online: 5 SEP 2008

    6. Microwave Arcing Induced Formation and Growth Mechanisms of Core/Shell Metal/Carbon Nanoparticles in Organic Solutions (pages 2048–2056)

      Yu-Lin Hsin, Chia-Fen Lin, Yu-Chia Liang, Kuo Chu Hwang, Jia-Cherng Horng, Ja-an Annie Ho, Chun-Cheng Lin and Jih Ru Hwu

      Article first published online: 9 JUL 2008 | DOI: 10.1002/adfm.200701407

      Thumbnail image of graphical abstract

      Well-graphitized core/shell iron/carbon nanoparticles (Fe@CNPs) can be formed in toluene solutions containing Fe(CO)5-C60/70 by an novel microwave arcing process. The presence of C60/70 in the solution is very crucial to the formation of well graphitized graphene shells. It is demonstrated that M@CNPs can be produced either by the “carbon dissolution” or the “template growth” mechanism.

    7. Controlled Fabrication of Multitiered Three-Dimensional Nanostructures in Porous Alumina (pages 2057–2063)

      Audrey Yoke Yee Ho, Han Gao, Yee Cheong Lam and Isabel Rodríguez

      Article first published online: 25 JUN 2008 | DOI: 10.1002/adfm.200800061

      Thumbnail image of graphical abstract

      Multitiered, branched, porous anodic alumina (PAA) has been realized by sequentially stepping down the anodization potential while etching the barrier layer each anodization step. The image reveals an array of pores that branch into smaller pores in three succeeding tiers. The template may have applications in the growth and support of three-dimensional nanomaterials.

    8. The Relation Between Open-Circuit Voltage and the Onset of Photocurrent Generation by Charge-Transfer Absorption in Polymer : Fullerene Bulk Heterojunction Solar Cells (pages 2064–2070)

      Koen Vandewal, Abay Gadisa, Wibren D. Oosterbaan, Sabine Bertho, Fateme Banishoeib, Ineke Van Severen, Laurence Lutsen, Thomas J. Cleij, Dirk Vanderzande and Jean V. Manca

      Article first published online: 9 JUL 2008 | DOI: 10.1002/adfm.200800056

      Thumbnail image of graphical abstract

      Photocurrent generation by charge-transfer absorption was detected by a highly sensitive measurement of the external quantum efficiency spectra of a range of polymer:fullerene photovoltaic devices, obtained by different preparation and annealing conditions. It was shown that the effective band gap of the blend, as obtained from the onset of the charge-transfer band, correlates with the open-circuit voltage of these devices.

    9. Hybrid CdSe Nanoparticle–Carbazole Dendron Boxes: Electropolymerization and Energy-Transfer Mechanism Shift (pages 2071–2078)

      Yushin Park, Prasad Taranekar, Jin Young Park, Akira Baba, Timothy Fulghum, Ramakrishna Ponnapati and Rigoberto C. Advincula

      Article first published online: 9 JUL 2008 | DOI: 10.1002/adfm.200701201

      Thumbnail image of graphical abstract

      Synthesis of CdSe nanoparticles (NPs) capped with carbazole-modified dendrons and electrochemically crosslinked carbazole on the surface of CdSe-NPs. These modified CdSe-NPs can be tuned for either energy-transfer or charge-transfer applications.

    10. Imaging Surface Immobilization Chemistry: Correlation with Cell Patterning on Non-Adhesive Hydrogel Thin Films (pages 2079–2088)

      Hironobu Takahashi, Kazunori Emoto, Manish Dubey, David G. Castner and David W. Grainger

      Article first published online: 9 JUL 2008 | DOI: 10.1002/adfm.200800105

      Thumbnail image of graphical abstract

      New chemical imaging of patterned polymer biomaterials uses statistical processing of surface mass-spectrometry data (ToF-SIMS). Patterns of functional groups (NHS), peptides (RGD) and streptavidin correlate to cell-culture pattern fidelity in serum (15 days) with high chemical and spatial resolution.

    11. Iron(II) Metallomesogens Exhibiting Coupled Spin State and Liquid Crystal Phase Transitions near Room Temperature (pages 2089–2101)

      Maksym Seredyuk, Ana B. Gaspar, Vadim Ksenofontov, Yury Galyametdinov, Joachim Kusz and Philipp Gütlich

      Article first published online: 11 JUL 2008 | DOI: 10.1002/adfm.200800049

      Thumbnail image of graphical abstract

      Reaction of the ligand 2,2,2-tris(2-aza-3-((5-akloxy)(6-methyl)(2-pyridyl))prop-2-enyl)ethane (Cn-tameMe) with iron(II) salts has afforded two series of spin crossover metallomesogens Cn-1 (n = 6, 18; ClO4) and Cn-2 (n = 10–20; BF4) that show thermally driven spin crossover and mesomorphism above 300 K. The thermotropic behavior and temperature of the magnetic anomaly of compounds Cn-2 depend on the chain length defined by n.

    12. Doping Molecular Monolayers: Effects on Electrical Transport Through Alkyl Chains on Silicon (pages 2102–2113)

      Oliver Seitz, Ayelet Vilan, Hagai Cohen, Jaehyung Hwang, Marc Haeming, Achim Schoell, Eberhard Umbach, Antoine Kahn and David Cahen

      Article first published online: 10 JUL 2008 | DOI: 10.1002/adfm.200800208

      Thumbnail image of graphical abstract

      Doping materials (i.e., changing the properties of materials in a controllable fashion by adding defects) is a fundamental way to control their properties. Doping of semiconductors became possible only after sufficiently clean materials became available. Our study shows that the concept can be extended to molecular electronics, because sufficiently defect-free molecular monolayers can be manufactured.

    13. Directed Self-Assembly of Gradient Concentric Carbon Nanotube Rings (pages 2114–2122)

      Suck Won Hong, Wonje Jeong, Hyunhyub Ko, Michael R. Kessler, Vladimir V. Tsukruk and Zhiqun Lin

      Article first published online: 9 JUL 2008 | DOI: 10.1002/adfm.200800135

      Thumbnail image of graphical abstract

      Hundreds of gradient concentric rings of linear conjugated polymer with remarkable regularity over large areas were produced by controlled “stick-slip” motions of the contact line in a confined geometry consisting of a sphere on a flat substrate (i.e., sphere-on-flat geometry). Subsequently, they were exploited as a template to direct the formation of gradient concentric rings of multiwalled carbon nanotubes with controlled density.

    14. Blue-Emitting Cationic Iridium Complexes with 2-(1H-Pyrazol-1-yl)pyridine as the Ancillary Ligand for Efficient Light-Emitting Electrochemical Cells (pages 2123–2131)

      Lei He, Lian Duan, Juan Qiao, Ruji Wang, Peng Wei, Liduo Wang and Yong Qiu

      Article first published online: 17 JUL 2008 | DOI: 10.1002/adfm.200701505

      Thumbnail image of graphical abstract

      Blue-emitting cationic iridium complexes (see figure) are obtained by using 2-(1H-pyrazol-1-yl)pyridine (pzpy) as the ancillary ligands. Light-emitting electrochemical cells based on [Ir(dfppy)2(pzpy)]PF6 gave blue electroluminescence with the emission peak at 460 nm and CIE coordinates of (0.20, 0.28).

  5. Index

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

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