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

Physical Review Letters (2013)

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

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

Chemical Communications (2013)

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.

Dirk-Michael Drotlef, Peter Blümler,and Aránzazu del Campo

Magnetically Actuated Patterns for Bioinspired Reversible Adhesion (Dry and Wet)

Advanced Materials (2013)

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.

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

Nature Communications (2013)

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

Nanoscale (2013)

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)

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

Proceedings of the National Academy of Sciences (2013)

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.