Investigating Molecule-substrate Charge Transfer with Scanning Probe Microscopy

il y a 7 heures

Marseille, France CiNaM (Centre Inderdisciplinaire de Nanosciences de Marseille) Temps plein

**Investigating Molecule-Substrate Charge Transfer with Scanning Probe Microscopy**:

- Réf **ABG-135306**
- Sujet de Thèse
- 27/01/2026
- Sans financement dédié
- CiNaM (Centre Inderdisciplinaire de Nanosciences de Marseille)
- Lieu de travail- Marseille - Provence-Alpes-Côte d'Azur - France
- Intitulé du sujet- Investigating Molecule-Substrate Charge Transfer with Scanning Probe Microscopy
- Champs scientifiques- Physique
- Matériaux
- Mots clés- Surface Science, Molecular self-assembly, Scanning Tunneling Microscopy, Atomic Force Microscopy.

**Description du sujet**:

- Molecular self-assembled thin films are important materials in research and industry since they offer unique electronic, optical and mechanical properties. To obtain self-assembled films with specific properties, well-designed molecules and support materials as well as ideal parameters for the self-assembly are chosen. An important impact has the self-assembly itself, which is determined to a large extend by the molecule-support interaction. On strongly interacting surfaces like the ones of metals, a thin insulating (oxide) film is mostly used such that it separates the molecules from the metal surface and therefore weakens the strong interaction with the metal (no hybridization), guaranteeing a better self-assembly. However, it may happen that, intrinsically, an integer number of electrons tunnel between the conducting support and the molecules (ICT: _integer charge transfer_) [1,2], which has a high impact on the electronic and structural properties of the assembly. In particular, when the work function (WF) of the support is small and the electron affinity (EA) of the molecules is high, an electron transfer from the support to the molecules can appear, as recently shown with PTCDA molecules on MgO(001)/Ag(001) substrates [3]. And vice-versa, with a high WF of the support, a transfer of electrons may take place from the molecules to the support, as shown with 2H-phthalocyanine molecules on MoO3/Pd(001) substrates [4]. In general, such transfer of charges to or from molecular films opens new perspectives in molecular self-assembly, however, to date, there are still few examples where ICT phenomena as such have been deciphered and entirely characterized, and further film systems need to be studied in future.

**Prise de fonction**:

- 01/10/2026

**Nature du financement**:

- Sans financement dédié

**Précisions sur le financement**:

- Financement soumis au concours de l'école doctorale

**Présentation établissement et labo d'accueil**:

- CiNaM (Centre Inderdisciplinaire de Nanosciences de Marseille)

Le CINaM est situé sur le campus de Luminy au cœur du massif des calanques. Un premier bâtiment de béton brut, oscillant entre massivité et légèreté, héberge la plupart des physiciens du centre ainsi que quelques équipements remarquables notamment autour de la microscopie électronique, de la microscopie à champ proche et d’équipements de croissance. Un second bâtiment regroupe, sur quatre niveaux, la plupart des chimistes du CINaM dans des locaux entièrement rénovés en 2018 et bénéficiant de laboratoires de chimie entièrement équipés. Enfin un troisième bâtiment accueille la plateforme technologique de micro et nanofabrication du centre (PLANETE).

**Site web**:
**Intitulé du doctorat**:

- Doctorat de Physique

**Pays d'obtention du doctorat**:

- France

**Etablissement délivrant le doctorat**:

- Aix-Marseille Université

**Ecole doctorale**:

- Physique et sciences de la matière- 02/03/2026

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