Advanced Functional Materials

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Recently Published Articles

  1. Insights into Nanoscale Electrochemical Reduction in a Memristive Oxide: the Role of Three-Phase Boundaries

    Christian Lenser, Marten Patt, Stephan Menzel, Annemarie Köhl, Carsten Wiemann, Claus M. Schneider, Rainer Waser and Regina Dittmann

    Article first published online: 19 APR 2014 | DOI: 10.1002/adfm.201304233

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    The three-phase boundary between electrode, oxide and ambient is shown to play a crucial role for the electroreduction in resistively switchable devices fabricated from Fe-doped SrTiO3. Nanoscale chemical mapping by X-ray photoemission electron microscopy, combined with simulated temperature profiles of the filaments, provide evidence that localized Joule heating at the electrode edge is essential for the formation of conducting filaments.

  2. Surface Textured Polymer Fibers for Microfluidics

    Adem Yildirim, Muhammad Yunusa, Fahri Emre Ozturk, Mehmet Kanik and Mehmet Bayindir

    Article first published online: 17 APR 2014 | DOI: 10.1002/adfm.201400494

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    On-fiber microfluidics are introduced as a new platform for the fabrication of disposable microfluidic devices. Well-ordered, perfectly aligned microchannels on polymer fibers are obtained using thermal fiber drawing. Spontenous capillary flow along three-dimensional fiber geometries, switch systems that allow precise control on fluid flow, and a proof of concept colorimetric protein assay are demonstrated.

  3. Correlated Donor/Acceptor Crystal Orientation Controls Photocurrent Generation in All-Polymer Solar Cells

    Marcel Schubert, Brian A. Collins, Hannah Mangold, Ian A. Howard, Wolfram Schindler, Koen Vandewal, Steffen Roland, Jan Behrends, Felix Kraffert, Robert Steyrleuthner, Zhihua Chen, Konstantinos Fostiropoulos, Robert Bittl, Alberto Salleo, Antonio Facchetti, Frédéric Laquai, Harald W. Ade and Dieter Neher

    Article first published online: 17 APR 2014 | DOI: 10.1002/adfm.201304216

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    Splitting excitons into free charges can be very efficient at polymer/fullerene interfaces but it becomes a challenging task when the fullerene is replaced by a polymeric acceptor. Here, the structural origin of the photocurrent generation in P3HT:P(NDI2OD-T2) all-polymer solar cells is investigated. A proper relative orientation of the polymer crystallites is needed to create free charge carriers.

  4. Rechargeable Batteries: Complex Hydrides for Electrochemical Energy Storage (Adv. Funct. Mater. 16/2014) (page 2266)

    Atsushi Unemoto, Motoaki Matsuo and Shin-ichi Orimo

    Article first published online: 16 APR 2014 | DOI: 10.1002/adfm.201470101

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    A new family of solid-state electrolytes—complex hydrides—possesses fast ionic conductivity and electrochemical stability. Recent progress on the development of fast Li-ionic conductors based on the complex hydrides is reported by S. Orimo and co-workers. Success in stable battery operations of the bulk-type all-solid-state lithium rechargeable batteries are demonstrated using LiBH4-based electrolytes.

  5. Hybrid Materials: Strongly-Coupled Freestanding Hybrid Films of Graphene and Layered Titanate Nanosheets: An Effective Way to Tailor the Physicochemical and Antibacterial Properties of Graphene Film (Adv. Funct. Mater. 16/2014) (page 2257)

    In Young Kim, Suhye Park, Hyunseok Kim, Sungsu Park, Rodney S. Ruoff and Seong-Ju Hwang

    Article first published online: 16 APR 2014 | DOI: 10.1002/adfm.201470098

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    S. Park, S.-J. Hwang, and co-workers report the fabrication of strongly coupled hybrid films of reduced graphene oxide-layered titanate with an unexpected high sterilization efficiency for Escherichia coli. On page 2288, E. coli cells exposed to the hybrid film are irreversibly destroyed by the edges of the nanosheets. The enhanced adhesion of bacteria on the rough surface of the hybrid films additionally contributes to their excellent antibacterial activity.