A5084873225- Surface Chemistry and Catalysis
- Surface and Thin Film Phenomena
- Molecular Junctions and Nanostructures
- Spectroscopy and Quantum Chemical Studies
- Semiconductor Quantum Structures and Devices
- Ion-surface interactions and analysis
- Silicon Nanostructures and Photoluminescence
- Force Microscopy Techniques and Applications
- Semiconductor materials and devices
- Graphene research and applications
Institut National de la Recherche Scientifique
2022-2024
Ullmann coupling is a widely used reaction for the on-surface growth of low-dimensional carbon nanomaterials. The irreversible nature this prevents "self-healing" defects, and detailed knowledge its mechanism therefore essential to enable extended ordered structures. However, dynamics polymerization remain largely unexplored, as events occur on timescale faster than conventional scanning probe microscopy imaging frequencies. Here, we reveal these surface using high-speed variable-temperature...
Surface-confined reactions represent a powerful approach for the precise synthesis of low-dimensional organic materials. A complete understanding pathways surface would enable rational wide range molecules and polymers. Here, we report different reaction tetrathienylbenzene (T1TB) its extended congener tetrakis(dithienyl)benzene (T2TB) on Cu(111), investigated using scanning tunneling microscopy, X-ray photoelectron spectroscopy, density functional theory calculations. Both T1TB T2TB undergo...
The precise control of molecular self-assembly on surfaces presents many opportunities for the creation complex nanostructures. Within this endeavor, selective patterning by exploiting interactions at solid–liquid interface would be a beneficial capability. Using scanning tunneling microscopy 1,2,4-trichlorobenzene/Au(111) interface, we observed 1,3,5-tris(4-methoxyphenyl)benzene (TMPB) molecules in face-centered cubic (FCC) regions Au(111). Density functional theory calculations suggest...
Three types of moiré patterns, denoted as α-, β-, and γ-patterns, were observed in the molecular self-assembly 1,3,5-tris(4-cyanophenyl)benzene (TCPB) on HOPG. Their relative stability was studied through thermally induced phase transitions monitored situ by scanning tunneling microscopy. The incommensurate γ-pattern is thermodynamically more stable than commensurate α- β-patterns. preference explained a static distortion wave, which exclusively this pattern. Through lateral relaxation TCPB...
Planar and twisted self-assemblies of diketopyrrolopyrrole molecules are determined by aromatic substitutions as revealed STM at solid–liquid interfaces.
Abstract Heteroepitaxial growth is a process of profound fundamental importance as well an avenue to realize nanostructures such Ge/Si quantum dots (QDs), with appealing properties for applications in opto‐ and nanoelectronics. However, controlling the QD size, shape, composition remains major obstacle their practical implementation. Here, Ge on Si(111) were investigated situ real‐time by low energy electron microscopy (LEEM), enabling observation transition from wetting layer formation 3D...