Dr. Tobias
Vossmeyer

Scientific staff
address:
Universität Hamburg
Institut für Physikalische Chemie
Grindelallee 117
D-20146 Hamburg
Germany
room:
349a
telephone:
040/42838-7069
e-mail:
tobias.vossmeyer (at) chemie.uni-hamburg.de
Tobias Vossmeyer studied chemistry at the
Philipps-Universität Marburg, Germany, and received his Diploma in
1992. Thereafter, he worked as a Ph.D. student at the Hahn-Meitner
Institute, Berlin, where he investigated the formation of superlattice
assemblies from semiconductor nanoparticles. He received his Ph.D. in
1995 from the Technical University Berlin. After working on the
lithographically controlled deposition of nanoparticle patterns at the
University of California at Los Angeles (UCLA) he started a research
position at Sony’s Stuttgart Technology Center in 1998. Until 2007 he
worked as group leader at Sony’s Materials Science Laboratories where
his work focused on the development of novel nanostructured materials
for applications as chemical sensors. In 2007 he started a faculty
scientist position at the Institut für Physikalische Chemie
(IPhCh) of the University of Hamburg. His current research interests
are functional nanostructured materials and devices, self-assembly,
molecular recognition and design of interfaces, and chemical sensors.
Selected
Publications
Hendrik
Schlicke, Jan H. Schröder, Martin Trebbin, Alexey Petrov, Michael Ijeh,
Horst Weller,
and Tobias Vossmeyer:
Freestanding films of crosslinked gold
nanoparticles prepared via
layer-by-layer spin-coating

A new, extremely efficient method for the
fabrication of films comprised
of gold-nanoparticles (GNPs) crosslinked by organic dithiols is
presented. The
method is based on layer-by-layer spin-coating of both components, GNPs
and
crosslinker, and enables the deposition of films with several tens of
nanometers
in thickness within a few minutes. X-ray diffraction and conductance
measurements reveal the concentration of the crosslinker solution being
critical to adjust properly in order to prevent destabilization and
coalescence of particles. UV/vis spectroscopy, atomic force microscopy,
and
conductivity measurements indicate that films prepared via
layer-by-layer
spin-coating are of comparable quality as coatings prepared via
laborious
layer-by-layer self-assembly using immersion baths. Because spin-coated
films
are not bound chemically to the substrate they can be lifted-off by
alkaline
underetching and transferred onto 3d-electrodes to produce electrically
addressable, freely suspended films. Comparative measurements of sheet
resistances indicate that the transfer process does not compromise the
film
quality.
Nanotechnology
2011, 22, 305303 (DOI:10.1088/0957-4484/22/30/305303 )
Tobias Vossmeyer, Carsten Stolte, Michael Ijeh,
Andreas Kornowski, Horst Weller:
Networked Gold
Nanoparticle Coatings on Polyethylene: Charge Transport and Strain
Sensitivity

Flexible
polyethylene substrates are coated with networked gold nanoparticles
via
layer-by-layer deposition. The strain sensitive charge transport
combined with
the mechanical robustness of the coatings establishes a base for their
potential application as resistive strain sensors.
Adv.
Funct. Mater. 2008, 18, 1611 (DOI: 10.1002/adfm.200701509)
Nanoparticles,
Nanofibers,
Chemical Sensors
N. Krasteva, Y. Fogel, R. E. Bauer, K. Müllen, Y. Joseph,
N. Matsuzawa, A. Yasuda, T. Vossmeyer:
Vapor Sorption and Electrical Response of Au-Nanoparticle- Dendrimer
Composites,
Adv. Funct. Mater. 2007, 17, 881 (online: 2 Mar 2007)
I. Besnard, U.Schlecht, M. Burghard, A. Yasuda, T. Vossmeyer:
V2O5-nanofibres: Novel gas sensors with extremely high sensitivity to
amines,
Sens. Actuators B 2005, 106, 730
Y. Joseph, B. Guse, A. Yasuda, T. Vossmeyer:
Chemiresistor coatings from Pt- and Au-nanoparticle/nonandithiol films:
Sensitivity to gases and solvent vapors,
Sens. Actuators B 2005, 98, 188
J. M. Wessels, H.-G. Nothofer, W. E. Ford, F. von Wrochem, F. Scholz,
T. Vossmeyer, A. Schroeter, H. Weller, A. Yasuda:
Optical and electrical properties of 3-dimensional interlinked
Au-nanoparticle assemblies,
J. Am. Chem. Soc. 2004, 126, 3349
U. Schlecht, B. Guse, I. Raible, T. Vossmeyer, M. Burghard:
A direct synthetic approach to vanadium pentoxide nanofibres modified
with silver-nanoparticles,
Chem. Commun. 2004, 2184
Y. Joseph, N. Krasteva, I. Besnard, B. Guse, M. Rosenberger, U. Wild,
A. Knop-Gericke, R. Schlögl, A. Yasuda, T. Vossmeyer:
Gold-nanoparticle/organic linker films: self-assembly, electronic and
structural characterisation, composition and vapour sensitivity,
Faraday Discuss. 2004, 125, 77
N. Krasteva, R. Krustev, A. Yasuda, T. Vossmeyer:
Vapour sorption in self-assembled gold nanoparticle/dendrimer films
studied by specular neutron reflectometry,
Langmuir 2003, 19, 7754
Joseph, I. Besnard, M. Rosenberger, B. Guse, H.-G. Nothofer, J. M.
Wessels, U. Wild, A. Knop-Gericke, D. Su, R. Schlögl, A. Yasuda,
T. Vossmeyer:
Self-Assembled gold-nanoparticle/alkanedithiol films: Preparation,
electron microscopy, XPS-analysis, charge transport, and vapor-sensing
properties,
J. Phys. Chem. B 2003, 107, 7406
N. Krasteva, B. Guse, I. Besnard, A. Yasuda, T. Vossmeyer:
Gold nanoparticle/PPI-dendrimer based chemiresistors: Vapor-sensing
properties as a function of the dendrimer size,
Sens. Actuators B 2003, 92, 137
N. Krasteva, I. Besnard, B. Guse, R.E. Bauer, K. Müllen, A.
Yasuda, T. Vossmeyer:
Self-assembled gold nanoparticle/dendrimer composite films for vapor
sensing applications,
Nano Lett. 2002, 2, 551
T. Vossmeyer, B. Guse, I. Besnard, R.E. Bauer, K. Müllen, A.
Yasuda:
Gold nanoparticle/polyphenylen dendrimer composite films: Preparation
and vapor-sensing properties,
Adv. Mater. 2002, 14, 238
T. Vossmeyer, L. Katsikas, M. Giersig, I. G. Popovic, K. Diesner, A.
Chemseddine, A. Eychmüller, H. Weller:
CdS Nanoclusters: Synthesis, characterization, size dependent
oscillator strength, temperature shift of the excitonic transition
energy, and reversible absorbance shift,
J. Phys. Chem. 1994, 98, 7665
Superlattices
of
Nanocrystals
T. Vossmeyer, S.-W. Chung, W. M. Gelbart, J. R. Heath:
„Surprising superstructures: Rings“,
Adv. Mater. 1998, 10, 351
C. P. Collier, T. Vossmeyer, J. R. Heath:
Quantum dot superlattices,
Ann. Rev. Phys. Chem. 1998, 49, 371
T. Vossmeyer, G. Reck, L. Katsikas, E. T. K. Haupt, B. Schulz, H.
Weller:
A double-diamond superlattice built up of Cd17S4(SCH2CH2OH)26 clusters,
Science 1995, 267, 1476
T. Vossmeyer, G. Reck, B. Schulz, L. Katsikas, H. Weller:
A double-layer superlattice structure built up of
Cd32S14(SCH2CH(OH)CH3)36.4H2O clusters,
J. Am. Chem. Soc. 1995, 117, 12881
T. Vossmeyer, L. Katsikas, M. Giersig, I. G. Popovic, K. Diesner, A.
Chemseddine, A. Eychmüller, H. Weller:
CdS Nanoclusters: Synthesis, characterization, size dependent
oscillator strength, temperature shift of the excitonic transition
energy, and reversible absorbance shift,
J. Phys. Chem. 1995, 98, 7665
Lithographically controlled deposition of Nanoparticle Assemblies
O. Harnack, I. Besnard, A. Yasuda, T. Vossmeyer:
Lithographic patterning of layer-by-layer self-assembled nanostructures
using a water-soluble mask,
Appl. Phys. Lett. 2005, 86, 034108
T. Vossmeyer, S. Jia, E. DeIonno, M. R. Diehl, S.-H. Kim, X. Peng, A.
P. Alivisatos, J. R. Heath: Combinatorial approaches toward patterning
nanocrystals,
J. Appl. Phys. 1998, 84, 3664
T. Vossmeyer, E. DeIonno, J. R. Heath:
Light directed assembly of nanoparticles,
Angew. Chem. 1997, 109, 1123, Angew. Chem. Int. Ed. Engl. 1997, 36, 1080
J. R. Heath, T. Vossmeyer, E. DeIonno, G. Markovich:
Parallel processing of nanocrystal colloids: Light directed assembly
and simple devices,
Nanostructured Materials - Clusters, Composites, and Thin Films, ACS
Symposium Series 679, ed. by V. M. Shalaev and M. Moskovits, Seite 1
(1997)