Recherche

The optically tuneable nature of hybrid organic/inorganic heterostructures tailored by interfacing photochromic molecules with 2D semiconductors (2DSs) can be exploited to endow multi-responsiveness to the exceptional physical properties of 2DSs. In this study, a spiropyran-molybdenum disulfide (MoS2) light-switchable bi-functional field-effect transistor is realized. The spiropyran-merocyanine reversible photo-isomerization has been employed to remotely control both the ...

Submonolayer amounts of chloroaluminum-phthalocyanine on Cu(100) were studied with scanning tunneling spectroscopy. The molecule can be prepared in a fourfold symmetric state whose conductance spectrum exhibits a zero-bias feature similar to a Kondo resonance. In magnetic fields, however, this resonance splits far more than expected from the spin of a single electron. Density functional theory ...

Controlling the properties of 2D materials by defect engineering and atomic scale characterization by scanning tunneling microscopy   In this project, we will use scanning tunneling microscopy and spectroscopy (STM/STS) operating under ultra-high vacuum and at low temperature to study the structure and electronic properties of generated defects in 2D materials at the atomic scale. Substitutional atoms ...

Retour sur les premières Journée Plénières du GDR (26-28 Septembre 2022 ) Le 26-27 septembre 2022 s’est déroulée les premières journées plénières du GDR sur le site d’Odéon de l’université Paris Cité. Nous avons été ravis de vous accueillir pour ces premières journées et de l’avis de tous ces journées ont permis de réunir une bonne ...

Zinc hybrid supercapacitors (Zn-HSCs) hold immense potential toward the next-generation energy storage systems, effectively spanning the divide between conventional lithium-ion batteries (LIBs) and supercapacitors. Unfortunately, the energy density of most of Zn-HSCs has not yet rivalled the levels observed in LIBs. The electrochemical performance of aqueous Zn-HSCs can be enhanced through the chemical functionalization of ...

The square ice is a canonical example of a Coulomb phase in two dimensions: Its ground state is extensively degenerate and satisfies a local constraint on the spin arrangement (the so-called ice rule). In this paper, we use a loop flip algorithm to explore the properties of this ground state that we analyze not in ...

Monolayers of transition metal dichalcogenides (2D TMDs) experience strong modulation of their optical properties when the charge density is varied. Indeed, the transition from carriers composed mostly of excitons at low electron density to a situation in which trions dominate at high density is accompanied by a significant evolution of both the refractive index and ...

Complexes of cobalt(II) stabilized by lacunary polyoxometalates (CoPOMs) are highly discussed water oxidation catalysts (WOC). While their activity and stability in the oxygen evolution reaction (OER) have been widely explored, there is still no consensus between those claiming that CoPOMs are active and stable OER catalysts and those suggesting that they rather act as precatalysts, ...

The attachment of redox-active molecules to transition metal dichalcogenides, such as MoS2, constitutes a promising approach for designing electrochemically switchable devices through the control of the material’s charge/spin transport properties by the redox state of the grafted molecule and thus the applied electrical potential. In this work, defective plasma-treated MoS2 is functionalized by a ferrocene ...

KEYWORDS: Molecular Rectifiers, Self-Assembled Molecular Networks, surface functionalisation, charge transfer, organic electronics The candidate will be working on the design and synthesis of novel, self-assembling molecular networks (SAMNs) for current rectification. This PhD project will focus on the design of different molecular building blocks to optimize contact quality, minimize contact resistance, and improve interface capacitance. Additionally, ...