Conrad Becker

Axe

Nanomatériaux

E-mail

conrad.becker@univ-amu.fr

Phone

+33(0)6 95 39 63 39

Fax

+33(0)4 91 41 89 16

Localisation

R2

Grade

PU0

Fonction

enseignant - chercheur

becker.jpg

Activité

Molecular layers, nanoparticles, heterogeneous catalysis, alloys, STM

Thèmes

    Nanostructured surfaces
    Model catalysts
    Molecular films
    Low-temperature scanning tunneling microscopy
      Adsorption on bimetallic surfacesReactivity of bimetallic surfaces

 

Recherche

Oxide supported bimetallic nanoparticles

We use a template-controlled approach for the fabrication of well organized arrays of bimetallic nanoparticles on thin alumina films on Ni3Al(111). The morphology and the size of the nanoparticles is characterized by STM. The reactivity as a function of the nanoparticles size and composition can be monitored using molecular beam reactive scattering (MBRS).

Thin films of organic semiconductors

In this field of research we focus our attention to molecules, which are synthesized in the Molecular Engineering Department of the CINaM. Two classes of molecules are currently under investigation: azapentacenes and oligophenylenevinylene. These molecules are deposited by physical vapor deposition on single crystal surfaces (metals and thin oxide films) and are analyzed using STM, STS, and nc-AFM. _/This activity is supported by the Austrian FWF and the French ANR via the project: {{GroPolOMol}} (Growth of polar organic molecules on graphene and sapphire) ANR-14-CE34-0003

Microscopy and Optical Spectroscopy of Organic Layers

By combining microscopic and spectroscopic techniques we will correlate the structural and morphological properties of the molecular layers with their electronic and optical properties and to gain a deeper insight into the structure-property relationship of the organic layers. As a model system we will study the adsorption of (DHTAP) molecules on pristine and modified Cu(110) surfaces. The substrate modification is achieved by pre-adsorption of oxygen or nitrogen, inducing different surface reconstructions that significantly alter the structural, electronic and chemical properties at the Cu(110) surface. In this way, we want to explore the influence of the metal-organic interface on the adsorption and growth of the DHTAP molecules, their structure and orientation on the surface, as well as the ensuing electronic and optical properties of the organic layers.

This activity is supported by the Austrian Agency for International Cooperation in Education and Research (OeAD) Project No. FR 12/2017 and Campus France PHC AMADEUS 2017 projet No. 38069TB (MOSOL).

Parcours

    Professor of Physics at CINaM, Aix-Marseille University, France
    Habilitation in Physical Chemistry, University of Bonn, Germany
    Scientist at the Institute of Physical and Theoretical Chemistry, University of Bonn, Germany
    Postdoc at CRMC2, Marseille, France
    PhD in Physical Chemistry at University of Bonn, Germany

Publications

2019

Light‐Assisted Charge Propagation in Networks of Organic Semiconductor Crystallites on Hexagonal Boron Nitride

Aleksandar Matković, Jakob Genser, Markus Kratzer, Daniel Lüftner, Zhongrui Chen, Olivier Siri, Peter Puschnig, Conrad Becker, Christian Teichert

Advanced Functional Materials 1903816 (2019)10.1002/adfm.201903816

2018

Noncontact AFM and differential reflectance spectroscopy joint analyses of bis-pyrenyl thin films on bulk insulators: Relationship between structural and optical properties

Franck Bocquet, Laurent Nony, Franck Para, Philipda Luangprasert, Jean-Valère Naubron, Christian Loppacher, Thomas Leoni, Anthony Thomas, Alain Ranguis, Anthony d'Aléo, Frédéric Fages, Conrad Becker

Physical Review B: Condensed Matter and Materials Physics 97 (2018)10.1103/physrevb.97.235434

Growth morphologies of dihydro-tetraaza-acenes on c-plane sapphire

Aleksandar Matković, Aydan Çiçek, Markus Kratzer, Benjamin Kaufmann, Anthony Thomas, Zhongrui Chen, Olivier Siri, Conrad Becker, Christian Teichert

Surface Science 678:128-135 (2018)10.1016/j.susc.2018.03.009

Growth of Dihydrotetraazapentacene Layers on Cu(110)

Anthony Thomas, Walter Malone, Thomas Leoni, Alain Ranguis, Zhongrui Chen, Olivier Siri, Abdelkader Kara, Peter Zeppenfeld, Conrad Becker

Journal of Physical Chemistry C 122:10828-10834 (2018)10.1021/acs.jpcc.8b01336

2017

Adsorption and Growth of Bis-pyrene Molecular Layers on Au(111) Studied by STM

Tony Lelaidier, Thomas Leoni, Alain Ranguis, Anthony D’aléo, Frédéric Fages, Conrad Becker

Journal of Physical Chemistry C 121:7214-7220 (2017)10.1021/acs.jpcc.6b12354

2016

Optical and morphological properties of thin films of bis-pyrenyl pi-conjugated molecules

Tony Lelaidier, Tobias Luenskens, Alexander Weber, Thomas Leoni, Alain Ranguis, Anthony d'Aléo, Fréderic Fages, Aras Kartouzian, Conrad Becker, Ulrich Heiz

Physical Chemistry Chemical Physics 18:5299-5305 (2016)10.1039/c5cp06011g

2015

Distribution of Pd clusters on ultrathin, epitaxial TiO x films on Pt 3 Ti(111)

Christian Breinlich, Maria Buchholz, Marco Moors, Tobias Pertram, Conrad Becker, Klaus Wandelt

Beilstein Journal of Nanotechnology 6:2007-2014 (2015)

2014

Scanning Tunneling Microscopy Investigation of Ultrathin Titanium Oxide Films Grown on Pt 3 Ti(111)

Christian Breinlich, Maria Buchholz, Marco Moors, Séverine Le Moal, Conrad Becker, Klaus Wandelt

Journal of Physical Chemistry C 118:6186-6192 (2014)

Highly Ordered Molecular Films on Au(111): The N-Heteroacene Approach

Tony Lelaidier, Thomas Leoni, Pandurangan Arumugam, Alain Ranguis, Conrad Becker, Olivier Siri

Langmuir 30:5700-5704 (2014)

2013

Growth of Si ultrathin films on silver surfaces: Evidence of an Ag(110) reconstruction induced by Si

Romain Bernard, Thomas Leoni, Axel Wilson, Tony Lelaidier, Houda Sahaf, Eric Moyen, Loïc Assaud, Lionel Santinacci, Frédéric Leroy, Fabien Cheynis, Alain Ranguis, Haik Jamgotchian, Conrad Becker, Yves Borensztein, Margrit Hanbücken, Geoffroy Prévot, Laurence Masson

Physical Review B: Condensed Matter and Materials Physics 88 (2013)10.1103/PhysRevB.88.121411

Structural and compositional characterization of ultrathin titanium oxide films grown on Pt 3 Ti(111)

Séverine Le Moal, Marco Moors, Jan Markus Essen, Christian Breinlich, Conrad Becker, Klaus Wandelt

Journal of Physics: Condensed Matter 25:045013 (2013)

Atomic Structures of Silicene Layers Grown on Ag(111): Scanning Tunneling Microscopy and Noncontact Atomic Force Microscopy Observations

Andrea Resta, Thomas Leoni, Clemens Barth, Alain Ranguis, Conrad Becker, Thomas Bruhn, Patrick Vogt, Guy Le Lay

Scientific Reports 3 (2013)

2011

Mechanistic and spectroscopic identification of initial reaction intermediates for prenal decomposition on a platinum model catalyst

J. Haubrich, D. Loffreda, F. Delbecq, P. Sautet, Y. Jugnet, A. Krupski, Conrad Becker, K. Wandelt

Physical Chemistry Chemical Physics 13:6000 (2011)10.1039/c0cp02428g

2010

Characterization of bimetallic Au–Pt(111) surfaces

T. Kobiela, M. Moors, W. Linhart, I. Cebula, A. Krupski, Conrad Becker, K. Wandelt

Thin Solid Films 518:3650-3657 (2010)

CO adsorption on clean and oxidized Pt3Ti(111)

Séverine Le Moal, Marco Moors, Jan Markus Essen, Conrad Becker, Klaus Wandelt

Surface Science 604:1637-1644 (2010)

Adsorption and reaction of Rh(CO)2(acac) on Al 2 O 3 /Ni3Al(111)

Y. Lei, A. Uhl, Conrad Becker, K. Wandelt, C. Gates, R. Meyer, M. Trenary

Physical Chemistry Chemical Physics 12:1264-1270 (2010)

Formation of Ruthenium−Tin Nanoparticles on Al 2 O 3 /Ni 3 Al(111) from an Organometallic Precursor

Alexander Uhl, Yu Lei, Homa Khosravian, Conrad Becker, Klaus Wandelt, Richard Adams, Michael Trenary, Randall Meyer

Journal of Physical Chemistry C 114:17062-17068 (2010)

2009

The Adsorption of Ethene on Pd(111) and Ordered Sn/Pd(111) Surface Alloys

G. Hamm, T. Schmidt, J. Breitbach, D. Franke, Conrad Becker, Klaus Wandelt

Zeitschrift für Physikalische Chemie 223:209-232 (2009)

Adsorption and Vibrations of α,β-Unsaturated Aldehydes on Pt(111) and Pt−Sn Alloy (111) Surfaces. 3. Adsorption Energy vs Adsorption Strength

J. Haubrich, D. Loffreda, F. Delbecq, P. Sautet, Y. Jugnet, Conrad Becker, K. Wandelt

Journal of Physical Chemistry C 114:1073-1084 (2009)10.1021/jp908353p

Adsorption of α,β-Unsaturated Aldehydes on Pt(111) and Pt−Sn Alloys: II. Crotonaldehyde

J. Haubrich, D. Loffreda, F. Delbecq, P. Sautet, A. Krupski, Conrad Becker, K. Wandelt

Journal of Physical Chemistry C 113:13947-13967 (2009)10.1021/jp903473m

2008

Adsorption and Vibrations of α,β-Unsaturated Aldehydes on Pure Pt and Pt−Sn Alloy (111) Surfaces I. Prenal

J. Haubrich, D. Loffreda, F. Delbecq, P. Sautet, Y. Jugnet, A. Krupski, Conrad Becker, K. Wandelt

Journal of Physical Chemistry C 112:3701-3718 (2008)10.1021/jp075163p

Pd(110) surface oxide structures investigated by STM and DFT

M. Kralj, T. Pertram, N. Seriani, F. Mittendorfer, A. Krupski, Conrad Becker, K. Wandelt

Surface Science 602:3706-3713 (2008)

Scanning tunneling microscopy and spectroscopy investigations of copper phthalocyanine adsorbed on Al2O3/Ni3Al(111)

M. Moors, A. Krupski, S. Degen, M. Kralj, Conrad Becker, K. Wandelt

Applied Surface Science 254:4251-4257 (2008)

2006

Temperature and coverage-dependent evolution of the Au/Pd(110) surface structure

Marko Kralj, Aude Bailly, Marie-Claire Saint-Lager, Stefan Degen, Aleksander Krupski, Conrad Becker, Pierre Dolle, Maurizio de Santis, Klaus Wandelt

Surface Science 600:2614 (2006)10.1016/j.susc.2006.04.030

2004

Adsorption of Cyclopentene on Pt(111) and Ordered Pt n Sn/Pt(111) Surface Alloys

Conrad Becker, Françoise Delbecq, Jürgen Breitbach, Guido Hamm, Dieter Franke, Franziska Jäger, Klaus Wandelt

Journal of Physical Chemistry B 108:18960-18971 (2004)10.1021/jp047228j

Adsorption of Cyclopentene on Pt(111) and Ordered Pt n Sn/Pt(111) Surface Alloys

Conrad Becker, Françoise Delbecq, Jürgen Breitbach, Guido Hamm, Dieter Franke, Franziska Jäger, Klaus Wandelt

Journal of Physical Chemistry B 108:18960-18971 (2004)10.1021/jp047228j

2000

Reaction between CO and a pre-adsorbed oxygen layer on supported palladium clusters

Laurent Piccolo, Conrad Becker, C.R. Henry

Applied Surface Science 164:156 (2000)

1999

Kinetic modeling of the CO oxidation reaction on supported metal clusters

Laurent Piccolo, Conrad Becker, C.R. Henry

The European Physical Journal D : Atomic, molecular, optical and plasma physics 9:415 (1999)