Highlights 2013

Actuation of magnetic micropillars under the microscope by approaching a magnet with a micromanipulator.
P. de Bruyn, A. H. P. van Rest, G. A. H. Wetzelaer, D. M. de Leeuw, and P. W. M. Blom
Diffusion-Limited Current in Organic Metal-Insulator-Metal Diodes
An analytical expression for the diffusion current in organic metal-insulator-metal diodes is derived. Summing with the classical space-charge limited current provides a full analytic description of the current as a function of voltage, temperature and layer thickness.
© Phys. Rev. Lett. (2013)
Current density-voltage characteristics for a device
Actuation of magnetic micropillars under the microscope by approaching a magnet with a micromanipulator.
Daniel Hofmann, Claudia Messerschmidt, Markus Bannwarth, Katharina Landfester, and Volker Mailänder
Drug Delivery without Nanoparticle Uptake: Delivery by a Kiss-and-Run Mechanism at the Cell Membrane
Nearly all concepts of nanocarriers as drug delivery devices rely on intracellular uptake. Instead, we demonstrate an alternative concept for rapid and specific delivery of cargo by nanoparticles to lipid droplets. The model can serve as a novel strategy for the non-invasive delivery of drugs by releasing hydrophobic cargo, in our case a model dye, through a kiss-and-run mechanism between nanoparticle and cell membrane.
© Chem. Comm. (2013)
15 min incubation of PLLA-Fe-PMI-magnetite nanoparticles with DOPC-GUVs. White arrows indicate kiss-and-run movement of nanoparticles.
Actuation of magnetic micropillars under the microscope by approaching a magnet with a micromanipulator.
Dirk-Michael Drotlef, Peter Blümler,and Aránzazu del Campo
Magnetically Actuated Patterns for Bioinspired Reversible Adhesion (Dry and Wet)
In the course of evolution a large variety of highly specialized reversible adhesive pads have developed, enabling many animals mobility in all kinds of living environment. A simple procedure was developed to produce a magnetically controllable bio-inspired adhesive system. It is composed of elastic, magnetic micro-columns which can be turned on and off by a magnetic field and enable adhesion under dry and wet conditions.
© Advanced Materials (2013)
Actuation of magnetic micropillars under the microscope by approaching a magnet with a micromanipulator.
Crystal structures of chlorinated nanographenes
Yuan-Zhi Tan, Bo Yang, Khaled Parvez, Akimitsu Narita, Silvio Osella, David Beljonne, Xinliang Feng, and Klaus Müllen
Atomically precise edge chlorination of nanographenes and its application in graphene nanoribbons
Chemical functionalization is one of the most powerful and widely used strategies to control the properties of nanomaterials, particularly in the field of graphene. Here we present a general edge chlorination protocol for atomically precise functionalization of nanographenes at different scales and its application in graphene nanoribbons.
© Nature Communications (2013)
Crystal structures of chlorinated nanographenes
K. Bley, N. Sinatra, N. Vogel, K. Landfester, and C. K. Weiss
Switching light with light – advanced functional colloidal monolayers
Here, we present the formation of novel functional colloidal monolayers with photoswitchable fluorescence. Colloids containing an appropriate dye system can serve as individual pixels for optical data storage or light erasable barcoding.br>
© Nanoscale (2013)
Schematically depicting the pathways for vibrational relaxation of free OH groups.
Cho-Shuen Hsieh, R. Kramer Campen, Masanari Okuno, Ellen H. G. Backus, Yuki Nagata, and Mischa Bonn
Mechanism of Vibrational Energy Dissipation of Free OH Groups at the Air-Water Interface
The relaxation of vibrationally excited OH groups water at interfaces occurs in a manner fundamentally different from water in bulk. Two distinct pathways – both not present in bulk – are responsible for fast, sub-picosecond relaxation. These insights are relevant for e.g. the many atmospheric chemical processes occurring on water and ice surface.
© PNAS (2013)
Schematically depicting the pathways for vibrational relaxation of free OH groups.
 
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