A5001945321- Surface Chemistry and Catalysis
- Molecular Junctions and Nanostructures
- Graphene research and applications
- Surface and Thin Film Phenomena
- Fullerene Chemistry and Applications
- Astrophysics and Star Formation Studies
- Synthesis and Properties of Aromatic Compounds
- Quantum and electron transport phenomena
- Topological Materials and Phenomena
- Porphyrin and Phthalocyanine Chemistry
- Molecular Spectroscopy and Structure
- Copper-based nanomaterials and applications
- Advanced Chemical Physics Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Atmospheric Ozone and Climate
- nanoparticles nucleation surface interactions
- Spectroscopy and Laser Applications
- Quantum Dots Synthesis And Properties
- Astro and Planetary Science
- Plasmonic and Surface Plasmon Research
- Magnetic properties of thin films
- Supramolecular Self-Assembly in Materials
- Lanthanide and Transition Metal Complexes
- Covalent Organic Framework Applications
- Magnetism in coordination complexes
Madrid Institute for Advanced Studies
2014-2025
IMDEA Nanoscience
2014-2025
Quantum Group (United States)
2024
Robert Bosch (Germany)
2022
Faraday Technology (United States)
2020-2021
Instituto de Ciencia de Materiales de Madrid
2017-2020
Consejo Superior de Investigaciones Científicas
2020
Science Factory
2019
Laboratoire de physique des Solides
2012-2015
KU Leuven
2009-2015
Starting from the gas phase, small clusters can be produced and deposited with huge flexibility regard to composition, materials choice cluster size. Despite many advances in experimental characterization, a detailed morphology of such is still lacking. Here we present an atomic scale observation as well dynamical behaviour ultrasmall germanium clusters. Using quantitative scanning transmission electron microscopy combination ab initio calculations, are able characterize transition between...
The design of open-shell carbon-based nanomaterials is at the vanguard materials science, steered by their beneficial magnetic properties like weaker spin-orbit coupling than that transition metal atoms and larger spin delocalization, which are potential relevance for future spintronics quantum technologies. A key parameter in exchange (MEC) between unpaired spins, should be large enough to allow device operation practical temperatures. In this work, we theoretically experimentally explore...
Abstract The incorporation of non‐benzenoid motifs in graphene nanostructures significantly impacts their properties, making them attractive for applications carbon‐based electronics. However, understanding how specific structures influence properties remains limited, and further investigations are needed to fully comprehend implications. Here, we report an on‐surface synthetic strategy toward fabricating nanographenes containing different combinations pentagonal heptagonal rings. Their...
Engineering low-band-gap π-conjugated polymers is a growing area in basic and applied research. The main synthetic challenge lies the solubility of starting materials, which precludes advancements field. Here, we report an on-surface synthesis protocol to overcome such difficulties produce poly(p-anthracene ethynylene) molecular wires on Au(111). To this aim, quinoid anthracene precursor with =CBr
Abstract Graphene functionalization with organics is expected to be an important step for the development of graphene-based materials tailored electronic properties. However, its high chemical inertness makes difficult a controlled and selective covalent functionalization, most works performed up date report electrostatic molecular adsorption or unruly functionalization. We show hereafter mechanism promoting highly specific bonding any amino-terminated molecule description operating...
Disentangling the contributions of radiative and non-radiative localized plasmonic modes from photonic density states metallic nanocavities between atomically-sharp tips flat substrates remains an experimental challenge nowadays. Electroluminescence due to tunnelling through tip-substrate gap allows discerning solely excitation modes, but this information is inherently convolved with that electronic structure system. In work we present a fully procedure eliminate electronic-structure factors...
We report on the synthesis and characterization of atomically precise one-dimensional diradical peripentacene polymers a Au(111) surface. By means high-resolution scanning probe microscopy complemented by theoretical simulations, we provide evidence their magnetic properties, which arise from presence two unpaired spins at termini. Additionally, transition properties related to length polymer. Peripentacene dimers exhibit an antiferromagnetic (S=0) singlet ground state. They are...
Polycyclic aromatic hydrocarbons (PAHs) are a family of organic compounds comprising two or more fused rings which feature manifold applications in modern technology. Among these species, those presenting an open-shell magnetic ground state particular interest for electronic, spintronic, and non-linear optics energy storage devices. Within PAHs, special attention has been devoted recent years to the synthesis study acene (periacene) families, steered by their decreasing HOMO–LUMO gap with...
The synthesis of novel polymeric materials with porphyrinoid compounds as key components the repeating units attracts widespread interest from several scientific fields in view their extraordinary variety functional properties potential applications a wide range highly significant technologies. vast majority such polymers present closed-shell ground state, and, only recently, result improved synthetic strategies, engineering open-shell spin delocalization along conjugation length has been...
Interstellar carbonaceous dust is mainly formed in the innermost regions of circumstellar envelopes around carbon-rich asymptotic giant branch (AGB) stars. In these highly chemically stratified regions, atomic and diatomic carbon, along with acetylene are most abundant species after H
Triangulene and its homologues are promising building blocks for high‐spin low‐dimensional networks with long‐range magnetic order. Despite the recent progress in synthesis characterization of coupled triangulenes, key parameters such as number organic linking units or their dihedral angles remain scarce, making further studies crucial an essential understanding implications. Here, we investigate reactivity two triangulene dimers linked by (Dimer 1) one 2) para‐biphenyl units, respectively,...
Triangulene and its homologues are promising building blocks for high‐spin low‐dimensional networks with long‐range magnetic order. Despite the recent progress in synthesis characterization of coupled triangulenes, key parameters such as number organic linking units or their dihedral angles remain scarce, making further studies crucial an essential understanding implications. Here, we investigate reactivity two triangulene dimers linked by (Dimer 1) one 2) para‐biphenyl units, respectively,...
Open-shell nanographenes (NGs), also known as molecular π-magnets, have recently garnered attention for their potential in spintronics and quantum computing. Tailoring of such NGs at the atomic level allows control magnetic interactions. We report here on-surface synthesis a dibenzo-fused rhomboidal NG with predominant zigzag edges featuring an open-shell (antiferromagnetic) character high value exchange coupling (MEC) on Au(111) surfaces. Scanning tunneling microscopy (STM) noncontact force...
The increasing demand for nanostructured materials is mainly motivated by their key role in a wide variety of technologically relevant fields such as biomedicine, green sustainable energy or catalysis. We have succeeded to scale-up type gas aggregation source, called multiple ion cluster the generation complex, ultra-pure nanoparticles made different materials. high production rates achieved (tens g/day) this kind sources, and inherent ability control structure controlled environment, make...
The development of synthetic strategies to engineer \pi-conjugated polymers is paramount importance in modern chemistry and materials science. Here we introduce a theoretical experimental paradigm based on the search for specific vibrational modes through an appropriate tailoring \pi-conjugation precursors, order increase attempt frequency chemical reaction. First, on-surface design 1D polymer with \pi-topology, which bisanthene monomers linked by cumulene bridges that tune modes. In second...
The synthesis of long n-peri-acenes (n-PAs) is challenging as a result their inherent open-shell radical character, which arises from the presence parallel zigzag edges beyond certain n value. They are considered π-electron model systems to study magnetism in graphene nanostructures; being potential candidates fabrication optoelectronic and spintronic devices. Here, we report on-surface formation largest pristine member n-PA family, i.e. peri-heptacene (n=7, 7-PA), obtained on an Au(111)...
The design of antiferromagnetic nanomaterials preserving large orbital magnetic moments is important to protect their functionalities against perturbations. Here, we exploit an archetype H6HOTP species for conductive metal-organic frameworks a Co-HOTP one-atom-thick architecture on Au(111) surface. Our multidisciplinary scanning probe microscopy, X-ray absorption spectroscopy, linear dichroism, and circular dichroism study, combined with density functional theory simulations, reveals the...
We investigated the local influence of Au(111) herringbone reconstruction on properties thin adsorbed NaCl films using cryogenic scanning tunneling microscopy (STM) and spectroscopy. Depending hcp versus fcc character reconstruction, adsorption gives rise to a different shift surface state toward Fermi level, in agreement with ab initio calculations. Such lateral modulation may allow for tunable nanostructuring insulating films, which opens up new perspectives molecular electronics...
The deposition of tetracyanoethylene (TCNE) on Ag(111), both at Room Temperature (RT, 300 K) and low temperatures (150 K), leads to the formation coordination networks involving silver adatoms, as revealed by Variable-Temperature Scanning Tunneling Microscopy. Our results indicate that TCNE molecules etch away material from step edges possibly also terraces, which facilitates observed networks. Moreover, such process is temperature dependent, allows for different stoichiometric ratios...
The design of lanthanide multinuclear networks is an emerging field research due to the potential such materials for nanomagnetism, spintronics, and quantum information. Therefore, controlling their electronic magnetic properties paramount importance tailor envisioned functionalities. In this work, a multidisciplinary study presented combining scanning tunneling microscopy, spectroscopy, X-ray absorption linear dichroism, circular density functional theory, multiplet calculations, about...
Rod-like octadecylphosphonic acid (ODPA) capped CdSe nanocrystals (NCs) produced by hot injection in the presence of chlorinated cosolvents modify their shape and surface properties incorporation chloride capping ligand shell. Correlated cyclic voltammetry (CV) X-ray photoelectron spectroscopy (XPS) studies have been performed to address effect this on NCs surface. In contrast ODPA rod-like NCs, XPS confirm that, during oxidation containing chloride, not only Se atoms but also Cd takes...
Single magnetic Co atoms are deposited on atomically thin NaCl films Au(111). Two different adsorption sites revealed by high-resolution scanning tunneling microscopy (STM), i.e., at Na and Cl locations. Using density functional based simulations of the STM images, we show that substitute with either a or atom surface, resulting in cationic anionic dopants high thermal stability. The dependence coupling between neighboring their separation is investigated via spatially resolved measurement...