Advanced Functional Materials

Cover image for Vol. 18 Issue 6

March 25, 2008

Volume 18, Issue 6

Pages 837–966

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Feature Article
    5. Full Papers
    6. Index
    1. Cover Picture: Self-assembled Cationic Peptide Nanoparticles Capable of Inducing Efficient Gene Expression In Vitro (Adv. Funct. Mater. 6/2008)

      Nikken Wiradharma, Majad Khan, Yen Wah Tong, Shu Wang and Yi-Yan Yang

      Article first published online: 26 MAR 2008 | DOI: 10.1002/adfm.200890023

      Thumbnail image of graphical abstract

      On p. 943, Yi-Yan Yang and co-workers report on cationic and amphiphilic oligopeptides as nonviral vectors for gene delivery. The oligopeptides were able to self-assemble into core/shell nanoparticles at concentrations above the CMC value. The formation of the nanoparticles yielded a greater local concentration of positive charges, providing a stronger DNA binding ability, thus efficiently preventing DNA from enzymatic degradation. The peptide nanoparticles had little cytotoxicity against cell lines but did induce high gene expression levels in vitro.

  2. Contents

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Feature Article
    5. Full Papers
    6. Index
    1. Contents: Adv. Funct. Mater. 6/2008 (pages 837–841)

      Article first published online: 26 MAR 2008 | DOI: 10.1002/adfm.200890024

  3. Feature Article

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Feature Article
    5. Full Papers
    6. Index
    1. Biologically Inspired Surfaces: Broadening the Scope of Roughness** (pages 843–855)

      Michael Nosonovsky and Bharat Bhushan

      Article first published online: 18 MAR 2008 | DOI: 10.1002/adfm.200701195

      Thumbnail image of graphical abstract

      The figure shows a scanning electron microscopy (SEM) image of Nelumbo nucifera (lotus) leaf - a superhydrophobic surface that shows hierarchical roughness. New approaches to surface-roughness description are required for biologically inspired functional surfaces.

  4. Full Papers

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Feature Article
    5. Full Papers
    6. Index
    1. A Facile Strategy for Preparation of Fluorescent SWNT Complexes with High Quantum Yields Based on Ion Exchange (pages 857–864)

      Chuanlong Fu, Lingjie Meng, Qinghua Lu, Zhaofu Fei and Paul J. Dyson

      Article first published online: 18 MAR 2008 | DOI: 10.1002/adfm.200701144

      Thumbnail image of graphical abstract

      A facile ion exchange strategy is used to prepare a fluorescent SWNT-imidazolium salt complex; blue light emission can be observed upon excitation at 254 nm (see figure). The complex retains a high fluorescent quantum yield (0.40) and the one-dimensional electronic states of SWNTs.

    2. A Morphological Model for the Solvent-Enhanced Conductivity of PEDOT:PSS Thin Films (pages 865–871)

      Alexandre Mantovani Nardes, René A. J. Janssen and Martijn Kemerink

      Article first published online: 11 MAR 2008 | DOI: 10.1002/adfm.200700796

      Thumbnail image of graphical abstract

      The morphology of two PEDOT:PSS thin films is shown (see topographic STM image). In the pristine film (left), the 20–25 nm sized PEDOT-rich particles are randomly distributed. After sorbitol treatment (right) these particles arrange along parallel lines. This explains the conduction mechanism change from 3D to 1D variable range hopping and the conductivity increase by 3 orders of magnitude.

    3. Biocompatible, Luminescent Silver@Phenol Formaldehyde Resin Core/Shell Nanospheres: Large-Scale Synthesis and Application for In Vivo Bioimaging (pages 872–879)

      Shi-Rui Guo, Jun-Yan Gong, Peng Jiang, Mian Wu, Yang Lu and Shu-Hong Yu

      Article first published online: 18 MAR 2008 | DOI: 10.1002/adfm.200701440

      Thumbnail image of graphical abstract

      Biocompatible and green luminescent monodisperse silver/phenol formaldehyde resin core/shell spheres with controllable sizes and interesting architectures (centric, eccentric, and coenocytic core/shell spheres) have been synthesized by a one-step hydrothermal approach. This core/shell material can be used as a bioimaging label for human lung cancer H1299 cells (see fluorescence microscopy image).

    4. Continuous Aspect-Ratio Tuning and Fine Shape Control of Monodisperse α-Fe2O3 Nanocrystals by a Programmed Microwave–Hydrothermal Method (pages 880–887)

      Xianluo Hu and Jimmy C. Yu

      Article first published online: 18 MAR 2008 | DOI: 10.1002/adfm.200700671

      Thumbnail image of graphical abstract

      Monodisperse α-Fe2O3 nanocrystals with controlled morphology and tunable optical properties are prepared by a rapid and economical programmed microwave-hydrothermal method, and their optical properties are demonstrated (see figure). It is shown that the initial molar ratio of Fe3+ to POmath image plays a crucial role for the selective morphogenesis of the crystals.

    5. Reactive Spinning of Cyanate Ester Fibers Reinforced with Aligned Amino-Functionalized Single Wall Carbon Nanotubes (pages 888–897)

      Jianfei Che and Mary B. Chan-Park

      Article first published online: 18 MAR 2008 | DOI: 10.1002/adfm.200700919

      Thumbnail image of graphical abstract

      Cyanate ester (CE) composite fibers with aligned amino-functionalized SWNTs (f-SWNTs) were produced by reactive spinning. These f-SWNT (1 wt%)reinforced composite fibers show 85, 140, and 420% increase in tensile strength, elongation and stress–strain curve area respectively compared to neat CE fibers.

    6. Towards Designing Stable Pd-Based Membranes for Hydrogen Gas Separation: A Statistical Thermodynamics Approach (pages 898–906)

      Diana E. Nanu and Amarante J. Böttger

      Article first published online: 18 MAR 2008 | DOI: 10.1002/adfm.200700501

      Thumbnail image of graphical abstract

      A novel approach to design multicomponent fcc alloys-alloys membranes for H2 separation. The approach couples the cluster variation method with effective pair potentials to describe the phase boundaries between α-solid solutions and β-hydrides.

    7. Probing Local Surface Potential of Quasi-One-Dimensional Systems: A KPFM Study of P3HT Nanofibers (pages 907–914)

      Andrea Liscio, Vincenzo Palermo and Paolo Samorı`

      Article first published online: 18 MAR 2008 | DOI: 10.1002/adfm.200701142

      Thumbnail image of graphical abstract

      The quantitative determination of the local surface potential of regioregular poly(3-hexylthiophene) (P3HT) nanofibers self-assembled at surfaces is accomplished using Kelvin probe force microscopy (KPFM). A new computational model enables us to increase the lateral resolution of the technique allowing the characterization of quasi-one-dimensional systems. The figure shows the AFM image of P3HT nanofibers on SiOx: the surface potential of each structure measured by KPFM is indicated.

    8. Oligophenylenevinylenes in Spatially Confined Nanochannels: Monitoring Intermolecular Interactions by UV/Vis and Raman Spectroscopy (pages 915–921)

      Mariya Aloshyna, Begoña Milián Medina, Lars Poulsen, Juliette Moreau, David Beljonne, Jérôme Cornil, Giuseppe Di Silvestro, Michele Cerminara, Francesco Meinardi, Riccardo Tubino, Heiner Detert, Sigurd Schrader, Hans-Joachim Egelhaaf, Chiara Botta and Johannes Gierschner

      Article first published online: 18 MAR 2008 | DOI: 10.1002/adfm.200700647

      Thumbnail image of graphical abstract

      Channel-forming inclusion compounds (ICs) of conjugated oligomers offer high chromophore concentrations, but at the same time quasi-isolated entities of tightly-packed, well-oriented objects with bright photoluminescence (PL) and the possibility for color tuning. The combined PL and Raman study compares ICs with oligomer thin films, supported by quantum-chemical calculations.

    9. Size Selective Synthesis of Superparamagnetic Nanoparticles in Thin Fluids under Continuous Flow Conditions (pages 922–927)

      Suk Fun Chin, K. Swaminathan Iyer, Colin L. Raston and Martin Saunders

      Article first published online: 18 MAR 2008 | DOI: 10.1002/adfm.200701101

      Thumbnail image of graphical abstract

      Continuous flow spinning disc processing (SDP) is used to produce superparamagnetic Fe3O4 nanoparticles at room temperature. Ammonia is passed over a thin aqueous film of Fe2+/3+ that has been introduced through a jet feed to the center of a rapidly rotating disc. The particle size distribution is well controlled and the resulting material has a very high saturation magnetization.

    10. A Multifunctional Iridium-Carbazolyl Orange Phosphor for High-Performance Two-Element WOLED Exploiting Exciton-Managed Fluorescence/Phosphorescence (pages 928–937)

      Cheuk-Lam Ho, Wai-Yeung Wong, Qi Wang, Dongge Ma, Lixiang Wang and Zhenyang Lin

      Article first published online: 18 MAR 2008 | DOI: 10.1002/adfm.200701115

      Thumbnail image of graphical abstract

      Highly efficient simple two-element WOLEDs with excellent color stability are fabricated using an orange triplet emitter (1) and a blue singlet emitter (see Figure). The host singlet is resonant with the blue fluorophore singlet state and the host triplet is resonant with the orange phosphor triplet level, leading to peak EL efficiencies of 26.6 cd A−1and 13.5 lm W−1 that are superior to other two-element all-fluorophore or all-phosphor counterparts.

    11. Enhanced Emission of (In, Ga) Nitride Nanowires Embedded with Self-Assembled Quantum Dots (pages 938–942)

      Chih-Wei Hsu, Abhijit Ganguly, Chi-Hui Liang, Yu-Ting Hung, Chien-Ting Wu, Geng-Ming Hsu, Yang-Fang Chen, Chia-Chun Chen, Kuei-Hsien Chen and Li-Chyong Chen

      Article first published online: 18 MAR 2008 | DOI: 10.1002/adfm.200700739

      Thumbnail image of graphical abstract

      Self-assembled quantum dots (SAQDs) are observed embedded in Ga-rich and In-rich (In, Ga)N nanowires (see figure). Detailed characterization reveals that those SAQDS originate from the self-aggregation of isovalent heteroatoms within the nanowires matrices. The SAQDs, though minor in composition, are found to dominate the luminescent behavior.

    12. Self-assembled Cationic Peptide Nanoparticles Capable of Inducing Efficient Gene Expression In Vitro (pages 943–951)

      Nikken Wiradharma, Majad Khan, Yen Wah Tong, Shu Wang and Yi-Yan Yang

      Article first published online: 18 MAR 2008 | DOI: 10.1002/adfm.200700884

      Thumbnail image of graphical abstract

      Self-assembled cationic peptide nanoparticles are prepared and used as carriers for gene delivery into various cell lines. These nanoparticles induce high-gene-expression efficiency, which is comparable to that obtained using the gold standard for gene expression, polyethyleneimine (PEI). Importantly, the cationic peptide nanoparticles are much less cytotoxic than PEI.

    13. Synthesis of Thin, Oriented Zeolite A Membranes on a Macroporous Support (pages 952–958)

      Tatsiana A. Kuzniatsova, Matthew L. Mottern, William V. Chiu, Yanghee Kim, Prabir K. Dutta and Henk Verweij

      Article first published online: 18 MAR 2008 | DOI: 10.1002/adfm.200701001

      Thumbnail image of graphical abstract

      Oriented zeolite A membranes are produced by two-step synthesis on macroporous supports. Firstly, the support surface is pre-modified with cationic polymer, having selective affinity for zeolite A, and contacted with stable dispersion of zeolite A and Y mixture, resulting in selective, oriented, dense-packed deposition of A-cubes. Secondly, the seed layer grows epitaxially into continuous, thin, meso-defect free zeolite A layer.

    14. Template Synthesis of Aligned Carbon Nanotube Arrays using Glucose as a Carbon Source: Pt Decoration of Inner and Outer Nanotube Surfaces for Fuel-Cell Catalysts (pages 959–964)

      Zhenhai Wen, Qiang Wang and Jinghong Li

      Article first published online: 11 MAR 2008 | DOI: 10.1002/adfm.200700707

      Thumbnail image of graphical abstract

      Aligned carbon nanotube arrays with open ends are prepared by the in situ polymerization of glucose within anodic aluminum oxide templates under hydrothermal conditions followed by high-temperature carbonization, as schematically illustrated in the figure. Pt nanoparticles are decorated on the outer and inner surfaces of the nanotubes, and the resulting hybrid materials serve as excellent electrocatalysts for methanol oxidation.

  5. Index

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

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