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Nano Research & Applications
ISSN 2471-9838 Advanced Nano 2017
Notes:
Page 33
September 11-12, 2017 Amsterdam, Netherlands
20th International Conference on
Advanced Nanotechnology
Nano electronics based on ultra-robust
metal-terpyridine oligomer films and
chemical or optical molecular switches
Florian Von Wrochem
Sony Europe, Germany
C onsiderable efforts have been undertaken within the
past decades to shift organic-based thin-film devices
to the application level. However, a major obstacle is
given by the thermal deposition of metal electrodes, which
remained elusive due to the damage and the electrical
shorts experienced by the fragile molecular layers.
Here, we show that large area molecular junctions of
outstanding electronic properties and robustness can be
realized using densely packed molecular wires consisting
of FeII-terpyridine complex oligomers. Surprisingly, these
ultrathin oligomer-based devices are stable for over 2
years under regular current-voltage cycling, withstanding
a wide range of temperatures (150-360 K) and applied
voltages (3 V), so, offering a perspective to a robust
platform for molecular electronics. In the second part of
the talk, we demonstrate switching materials for memory
applications by means of two different approaches – a
chemical and a biochemical – to ultrathin molecular
switching layers. In the first system, remarkable resistive
switching has been obtained with tetraaniline layers and
tetraaniline/PEDOT blends, switched by proton doping, to
yield on/off ratios of up to 105. In the second approach, we
make use of Sn-cyt c protein layers to show that they act
as reversible and highly efficient photo-electrochemical
switches, even upon integration into large area solid
state junctions. Photocurrents are observed both in the
Soret-band (=405 nm) and in the Q-band (=535 nm),
with current on/off ratios reaching values of up to 25, so
making protein photo detectors a realistic scenario.
Biography
Florian Von Wrochem is a Principal Scientist and Project Leader at Materials
Science Laboratory of Sony Corporate labs (Stuttgart, Germany). He received
his PhD in Physics from the University of Basel in 2007 in parallel with his
R&D activities at the Sony Europe. The research in his group is addressing the
development of novel organic and molecular electronic devices, e.g. memories
and logic circuits for flexible electronics. These activities involve the fabrication
and electrical characterization of organic opto-electronic devices at the nano
and micro scale, the spectroscopic and topographic investigation of surfaces
and interfaces, as well as the design and synthesis of functional materials.
Florian Von Wrochem, Nano Res Appl 2017, 3:3
DOI: 10.21767/2471-9838-C1-002