4th EucheMs chemistry congress

wednesday, 29-Aug 2012
s743
chem. Listy 106, s587–s1425 (2012)
Nanochemistry / Nanotechnology / Molecular machines, Carbon tubes, sheets, balls
Nanochemistry, nanotechnology and nanostructured
materials – iii
o - 3 4 7
MuLtifunCtionAL SuPrAMoLeCuLAr
eLeCtroniCS
P. SAMori 1
1 University of Strasbourg - CNRS, ISIS, Strasbourg, France
Multifunctional materials are key in organic
(opto)electronics. However, their practical use requires the
optimization of the self-assembly of multimodular architectures at
surfaces using non-conventional methods, their controlled
manipulation and responsiveness to external stimuli, and the
quantitative study of various physicochemical properties at distinct
length-/time-scales. My lecture will review our recent results on:
(i) Development of novel (post)processing methods to
produce ordered supramolecular electroactive
architectures. [1]
(ii) Supramolecular scaffolding, based on H-bonding or
metallo-ligand interactions, to control the position of
functional units at surfaces. [2]
(iii) Responsive interfaces like the realization of the first
dynamer operating at surfaces visualized on the sub-nm
scale by Scanning Tunneling Microscopy, [3] and
prototypes of light-powered mechano-chemical
switches. The bistable nature of the latter were exploited
to develop optically-modulable nanoscopic and
macroscopic junctions. [4]
(iv) Scanning Probe Microscopies beyond imaging to
explore electronics processes, like photovoltaic
activities, in multicomponent architectures. [5] Further,
the electrochemical local reduction of graphene oxide
with and AFM tip followed by the C-AFM study of the
electrical properties of the manipulated architecture will
be presented, [6] towards blueprinting macromolecular
electronics. [7]
(v) Supramolecular approaches to organic electronics allow
improvement of the performance of devices, e.g.
through the tailoring of percolation pathways for
charge transport in polycrystalline films for FETs, [8]
bottom-up fabrication of asymmetric electrodes for
ambipolar FETs, [9] and realization of bi-functional
FET. [10]
references:
1. Adv. Funct. Mater. 2011, 21, 1279.
2. a) Angew. Chem. Int. Ed. 2007, 46, 245.
b) Adv. Mater. 2008, 20, 2433.
3. Angew. Chem. Int. Ed. 2010, 49, 1963
4. a) PNAS 2007, 104, 9937.
b) JACS 2008, 130, 9192.
c) Angew. Chem. Int. Ed. 2008, 47, 3407.
5. Acc. Chem. Res. 2010, 43, 541.
6. JACS 2010, 132, 14130.
7. Nat. Chem. 2011, 3, 431.
8. Chem. Commun. 2012, 48, 1562.
9. Adv. Mater. 2010, 22, 5018.
10. Adv. Mater. 2011, 23, 1447.
Keywords: supramolecular electronics; self-assembly;
nanochemistry;
4 th EucheMs chemistry congress
Nanochemistry, nanotechnology and nanostructured
materials – iii
o - 3 4 8
MoLeCuLAr eLeCtroniCS At the uLtiMAte
LiMit of SinGLe MoLeCuLeS interroGAted in
SoLid-StAte deviCeS
t. BJornhoLM 1
1 University of Copenhagen, Nano-Science Center &
Department of Chemistry, Copenhagen, Denmark
One of the challenging goals of molecular electronics is to
understand and master electronic devices at the single-molecule
level. Based on recent progress employing three terminal
solid-state devices [1-5] it is possible to interrogate a single molecule
in a metal gap in great detail. The talk will focus on new
insight into the physics and chemistry of such molecules in
particular the influence of metal electrodes on the molecular
energy spectrum [1] , controlling molecular spin [2] and progress
towards chemical preparation of single molecule devices in which
the molecule/metal interface can be controlled with atomic
precision. [3, 4] Finally, the talk will present very recent
developments in the fabrication of molecular solid-state devices
employing graphene as soft top-contacts [5].
references:
1. K. Moth-Poulsen, T. Bjornholm, Nature Nanotechnology 4
551-556 (2009); S. Kubatkin, et al., Nature 425, 698-701
(2003).
2. E. A. Osorio et al., Nano Letters 10 105 - 110 (2010).
3. C.A. Martin et al., J. Am. Chem. Soc. 130 13198-13199
(2008).
4. T. Jain et al., ACS Nano 3 828 (2009); J. Colloid Int. Sci,
in press (2012) ; ACS Nano, in press (2012).
5. T. Li et al., Adv Mater 24 1333-1339 (2012); Z. Wei et al,
Langmuir 28 4016-4023 (2012).
Keywords: Single-molecule studies; Supramolecular
chemistry; Molecular electronics; Nanotechnology;
AUGUst 26–30, 2012, PrAGUE, cZEcH rEPUbLIc