Advanced Functional Materials
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Recently Published Articles
- Thin Films: Solution-Processed Highly Efficient Alternating Current-Driven Field-Induced Polymer Electroluminescent Devices Employing High-k Relaxor Ferroelectric Polymer Dielectric (Adv. Funct. Mater. 11/2014) (page 1500)
Yonghua Chen, Yingdong Xia, Hengda Sun, Gregory M. Smith, Dezhi Yang, Dongge Ma and David L. Carroll
Article first published online: 13 MAR 2014 | DOI: 10.1002/adfm.201470071
Organic electroluminescent devices driven by time-dependent voltages or alternating current offer an alternative to standard OLED technologies. However, very little is known about how this might translate into overall performance of such devices. D. Ma, D. L. Carroll, and co-workers demonstrate a solutionprocessed route to create highly efficient AC field-induced polymer EL devices, employing a solution-processable high-k dielectric. The high luminance and efficiency, as well as the solution processability, pave the way to industrial roll-to-roll manufacturing of solid-state lighting and displays.
- Defects: Understanding Bulk Defects in Topological Insulators from Nuclear-Spin Interactions (Adv. Funct. Mater. 11/2014) (page 1648)
Dimitrios Koumoulis, Belinda Leung, Thomas C. Chasapis, Robert Taylor, Daniel King Jr., Mercouri G. Kanatzidis and Louis-S. Bouchard
Article first published online: 13 MAR 2014 | DOI: 10.1002/adfm.201470073
Beneath the surface of a topological insulator is the bulk region (represented by its band structure), whose conductance should be kept minimal. New reproducible tools are needed which do not interfere with the surface states. Such non-invasive measurements of the bulk electronic properties can be provided by NMR spectroscopy, as shown by L.-S. Bouchard and co-workers on page 1519, which probes the resonant coupling of nuclear spins to the electrons near the Fermi level. Cover credit goes to Charlotte Gomez.
- Thin Films: Polymer-Modified Mesoporous Silica Thin Films for Redox-Mediated Selective Membrane Gating (Adv. Funct. Mater. 11/2014) (page 1493)
Johannes Elbert, Fabio Krohm, Christian Rüttiger, Sandra Kienle, Haiko Didzoleit, Bizan N. Balzer, Thorsten Hugel, Bernd Stühn, Markus Gallei and Annette Brunsen
Article first published online: 13 MAR 2014 | DOI: 10.1002/adfm.201470068
The control of ionic transport through nanometersized pores is described by M. Gallei, A. Brunsen, and co-workers. On page 1591, the charge of mesoporous silica membranes is controlled by the oxidation or reduction of redox-responsive ferrocene-containing polymers. Depending on the surface charge, mainly determined by the polymer oxidation state, positively or negatively charged test-molecules are able to diffuse into the pores or are excluded. Cover-Artwork by Criss Hohmann, Nanosystems Initiative Munich (NIM).
- Ferroelectrics: BaMgF4: An Ultra-Transparent Two-Dimensional Nonlinear Photonic Crystal with Strong χ(3) Response in the UV Spectral Region (Adv. Funct. Mater. 11/2014) (page 1494)
Luis Mateos, Mariola O. Ramírez, Irene Carrasco, Pablo Molina, Juan F. Galisteo-López, Encarnación G. Víllora, Carmen de las Heras, Kiyoshi Shimamura, Cefe Lopez and Luisa E. Bausá
Article first published online: 13 MAR 2014 | DOI: 10.1002/adfm.201470069
The first example of a two-dimensional, nonlinear photonic crystal fabricated on an ultra-transparent ferroelectric fluoride crystal is demonstrated by M. O. Ramirez and co-workers via direct electron beam writing. On page 1509, up to three different Cerenkov-type second harmonic generation processes are distributed in a conical geometry and a highly efficient Χ(3)- UV-third harmonic generation is also demonstrated.