575 citations · 1.9k across the 29 of their papers we have counts for
29 papers
Selectivity in tip-induced skeletal editing via heteroatom substitution
Shantanu Mishra, Rasmus Svensson, Valentina Malave +5
Skeletal editing enables precise structural modifications of molecules at late stages of a synthetic sequence, with applications in drug discovery and materials science. We recentl…
Topological Engineering of a Frustrated Antiferromagnetic Triradical in Aza-Triangulene Architectures
Francisco Romero-Lara, Manuel Vilas-Varela, Manish Kumar +16
Open-shell nanographenes provide a versatile platform to host unconventional magnetic states within their π-conjugated networks. Particularly appealing are graphene architectures t…
A Single-Molecule Quantum Heat Engine
Serhii Volosheniuk, Riccardo Conte, Eugenia Pyurbeeva +6
Particle-exchange heat engines operate without moving parts or time-dependent driving, relying solely on static energy-selective transport. Here, we realize a particle-exchange qua…
Spin and Charge Control of Topological End States in Chiral Graphene Nanoribbons on a 2D Ferromagnet
Leonard Edens, Francisco Romero Lara, Trisha Sai +5
Tailor-made graphene nanostructures can exhibit symmetry-protected topological boundary states that host localized spin- moments. However, one frequently observes charge trans…
On-surface Synthesis of a Ferromagnetic Molecular Spin Trimer
Alessio Vegliante, Manuel Vilas-Varela, Ricardo Ortiz +12
Triangulenes are prototypical examples of open-shell nanographenes. Their magnetic properties, arising from the presence of unpaired electrons, can be extensively tuned by modi…
Synthesis and characterization of a -extended Clar's goblet
Shantanu Mishra, Manuel Vilas-Varela, Igor Rončević +4
Concealed non-Kekulé polybenzenoid hydrocarbons have no sublattice imbalance yet cannot be assigned a classical Kekulé structure, leading to an open-shell ground state with potenti…
A Route Toward the On-Surface Synthesis of Organic Ferromagnetic Quantum Spin Chains
Fabian Paschke, Ricardo Ortiz, Shantanu Mishra +5
Engineering sublattice imbalance is an intuitive way to induce high-spin ground states in bipartite polycyclic conjugated hydrocarbons (PCHs). Such high-spin molecules can be emplo…
Systematic Modulation of Charge and Spin in Graphene Nanoribbons on MgO
Amelia Domínguez-Celorrio, Leonard Edens, Sofía Sanz +7
Graphene nanostructures can be engineered with atomic precision to display customized electronic states with application in spintronics or quantum technologies. In order to take ad…
Observation of SOMO-HOMO inversion in a polycyclic conjugated hydrocarbon
Shantanu Mishra, Manuel Vilas-Varela, Shadi Fatayer +3
We report the generation of a non-benzenoid polycyclic conjugated hydrocarbon, which consists of a biphenyl moiety substituted by indenyl units at the 4,4' positions, on ultra-thin…
Tuning the Spin Interaction in Non-planar Organic Diradicals Through Mechanical Manipulation
Alessio Vegliante, Saleta Fernandez, Ricardo Ortiz +12
Open-shell polycyclic aromatic hydrocarbons (PAHs) represent promising building blocks for carbon-based functional magnetic materials. Their magnetic properties stem from the prese…
Emergence of π-Magnetism in Fused Aza-Triangulenes: Symmetry and Charge Transfer Effects
Jan Patrick Calupitan, Alejandro Berdonces-Layunta, Fernando Aguilar-Galindo +6
On-surface synthesis has paved the way towards the fabrication and characterization of conjugated carbon-based molecular materials that exhibit π-magnetism such as triangulenes. Az…
On-Surface Synthesis and Characterization of a High-Spin Aza-[5]-Triangulene
Manuel Vilas-Varela, Francisco Romero-Lara, Alessio Vegliante +13
Triangulenes are open-shell triangular graphene flakes with total spin increasing with their size. In the last years, on-surface-synthesis strategies have permitted fabricating and…
Bistability between -diradical open-shell and closed-shell states in indeno[1,2-a]fluorene
Shantanu Mishra, Manuel Vilas-Varela, Leonard-Alexander Lieske +7
Indenofluorenes are non-benzenoid conjugated hydrocarbons that have received great interest owing to their unusual electronic structure and potential applications in non-linear opt…
Detecting the spin-polarization of edge states in graphene nanoribbons
Jens Brede, Nestor Merino-Díez, Alejandro Berdonces +9
Low dimensional carbon-based materials are interesting because they can show intrinsic -magnetism associated to p-electrons residing in specific open-shell configurations. Conse…
Aza-Triangulene: On-Surface Synthesis, Electronic and Magnetic Properties
Tao Wang, Alejandro Berdonces-Layunta, Niklas Friedrich +7
Nitrogen heteroatom doping into a triangulene molecule allows tuning its magnetic state. However, the synthesis of the nitrogen-doped triangulene (aza-triangulene) has been challen…
Magnetic Interactions Between Radical Pairs in Chiral Graphene Nanoribbons
Tao Wang, Sofia Sanz, Jesús Castro-Esteban +8
Magnetic graphene nanoribbons (GNRs) have become promising candidates for future applications, including quantum technologies. Here, we characterize magnetic states hosted by chira…
Band structure and energy level alignment of chiral graphene nanoribbons on silver surfaces
Martina Corso, Rodrigo E. Menchón, Ignacio Piquero-Zulaica +5
Chiral graphene nanoribbons are extremely interesting structures due to their low bandgaps and potential development of spin-polarized edge states. Here, we study their band struct…
Circumventing the Stability Problems of Graphene Nanoribbon Zigzag Edges
James Lawrence, Alejandro Berdonces-Layunta, Shayan Edalatmanesh +7
Carbon nanostructures with zigzag edges exhibit unique properties with exciting potential applications. Such nanostructures are generally synthesized under vacuum because their zig…
Topological phase transition in chiral graphene nanoribbons: from edge bands to end states
Jingcheng Li, Sofia Sanz, Nestor Merino-Díez +7
Precise control over the size and shape of graphene nanostructures allows engineering spin-polarized edge and topological states, representing a novel source of non-conventional $π…
Substrate-Independent Growth of Atomically Precise Chiral Graphene Nanoribbons
Dimas G. de Oteyza, Aran Garcia-Lekue, Manuel Vilas-Varela +10
Contributing to the need of new graphene nanoribbon (GNR) structures that can be synthesized with atomic precision, we have designed a reactant that renders chiral (3,1) - GNRs aft…
Band Depopulation of Graphene Nanoribbons Induced by Chemical Gating with Amino Groups
Jingcheng Li, Pedro Brandimarte, Manuel Vilas-Varela +10
The electronic properties of graphene nanoribbons (GNRs) can be precisely tuned by chemical doping. Here we demonstrate that amino (NH) functional groups attached at the edges…
Hierarchy in the halogen activation during surface-promoted Ullmann coupling
Néstor Merino-Díez, Alejandro Pérez Paz, Jingcheng Li +9
Within the collection of surface-supported reactions currently accessible for the production of extended molecular nanostructures under ultra-high vacuum, Ullmann coupling has been…
Uncovering the Triplet Ground State of Triangular Graphene Nanoflakes Engineered with Atomic Precision on a Metal Surface
Jingcheng Li, Sofia Sanz, Jesus Castro-Esteban +5
Graphene can develop large magnetic moments in custom crafted open-shell nanostructures such as triangulene, a triangular piece of graphene with zigzag edges. Current methods of en…
Critical role of phenyl substitution and catalytic substrate on the surface-assisted polymerization of dibromobianthracene derivatives
César Moreno, Mirco Panighel, Manuel Vilas-Varela +4
Understanding the nature and hierarchy of on surface reactions is a major chal- lenge for designing coordination and covalent nanostructures by means of multistep synthetic routes.…