Concept

Électronique moléculaire

Publications associées (113)

MEMS-based nanopatterning: new challenges and opportunities for Materials Science

Micro-mechanical systems are exquisite tools for high-resolution surface patterning. As an alternative to traditional photolithography, they can be used for local material deposition at the sub-100 nm scale. This can be either done by means of liquid dispe ...

2006

Supramolecular assembly, chirality, and electronic properties of rubrene studied by STM and STS

This thesis presents the first experimental results of a scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) investigation of rubrene at the supramolecular, molecular and submolecular level. Based on its semiconducting and fluores ...

EPFL2006

Interfacial properties of photovoltaic TiO2/dye/PEDOT-PSS heterojunctions

Ulf Anders Hagfeldt

Systems comprising a dense TiO2 film electrode, a ruthenium polypyridine dye and a PEDOT-PSS (poly(3,4-ethylenedioxythiophene)-poly(4-styrenesulfonate)) film were prepd. The heterojunctions have photovoltaic properties, with the dye absorbing the light, th ...

2005

The impact of molecular polarization on the electronic properties of molecular semiconductors

Libero Zuppiroli, Marie-Noëlle Bussac, Jean-David Picon

In a molecular semiconductor, the carrier is dressed with a polarization cloud that we treat as a quantum field of Frenkel excitons coupled to it. The consequences of the existence of this electronic polaron on the dynamics of an extra charge in a material ...

Eur. Phys. Soc. by EDP Sciences and Soc. Italiana Fisica2004

Investigation of low-dimensional supramolecular architectures by low-temperature scanning tunneling microscopy

Sylvain Clair

In this thesis we report investigations on supramolecular architectures assembled at well-defined metal surfaces. Supramolecular chemistry is dedicated to the study and use of non-covalent interactions to build highly organized molecular arrangements, aimi ...

EPFL2004

Correlated growth in ultrathin pentacene films on silicon oxide: effect of deposition rate

Frank Nüesch, Libero Zuppiroli

Understanding the growth mechanism in molecular organic thin films is fundamental to their applications in organic electronics. We present an extensive study of the growth mechanism of pentacene thin films on silicon dioxide (SiO2) using atomic ...

APS through AIP2004

Morphology Control in Self-Assembled Monolayers Written by Dip Pen Nanolithography

Francesco Stellacci

Here, we describe the effect of writing speed in dip pen nanolithography on the morphology (height and density) of self-assembled monolayers of alkanethiols on gold surfaces. The analysis of atomic force microscopy images of written monolayers shows that m ...

2004

Polaron formation and symmetry breaking

Libero Zuppiroli, Marie-Noëlle Bussac, François Gygi, Giulia Galli Gygi

In a molecular semiconductor, a charged molecule experiences a lattice relaxation which reorganizes it into a cation or an anion-radical. This species is not, in general, a polaron. By using calculations of the geometry and the electronic structure both ab ...

Elsevier2003

Occupied surface-state bands of the (1 x 2) ordered phase of Bi/InAs(110)

Marco Grioni

The ordered (1 x 2) monolayer of Bi on the InAs(110) surface is studied by means of angle-resolved high-resolution ultra-violet photoemission at room temperature. Four bands of Bi;induced surface states are singled out and their dispersion is mapped along ...

Institute of Physics2000

Net coherent optical gain in strongly pumped semiconductor microcavities

Benoît Marie Joseph Deveaud, Ursula Oesterle, Cristiano Ciuti, Michele Saba

We study the subpicosecond gain dynamics in a high-finesse semiconductor microcavity containing quantum wells by means of degenerate pump-probe spectroscopy. Tuning the optical excitation in resonance with both the exciton and the cavity modes, at high pum ...

2000

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