A5011391956- Magnetism in coordination complexes
- Molecular Junctions and Nanostructures
- Surface Chemistry and Catalysis
- Quantum and electron transport phenomena
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Porphyrin and Phthalocyanine Chemistry
- Graphene research and applications
- Lanthanide and Transition Metal Complexes
- Advanced Chemical Physics Studies
- Magnetic properties of thin films
- Surface and Thin Film Phenomena
- Electron Spin Resonance Studies
- Advancements in Battery Materials
- Advanced battery technologies research
- Block Copolymer Self-Assembly
- Supercapacitor Materials and Fabrication
- Catalytic Cross-Coupling Reactions
- Advanced NMR Techniques and Applications
- Conducting polymers and applications
- Advanced Battery Materials and Technologies
- Asymmetric Synthesis and Catalysis
- Fluorine in Organic Chemistry
- Organic and Molecular Conductors Research
- Catalytic C–H Functionalization Methods
Karlsruhe Institute of Technology
2015-2024
Institut Universitaire de France
2019
Institute of Nanotechnology
2018
Kerntechnische Entsorgung Karlsruhe (Germany)
2016
Institut Català de Nanociència i Nanotecnologia
2014
Technical University of Munich
2008-2011
University of British Columbia
2011
École Polytechnique Fédérale de Lausanne
2007-2010
Max Planck Institute for Solid State Research
2008-2010
Material Physics Center
2010
Recent advances in addressing isolated nuclear spins have opened up a path toward using nuclear-spin-based quantum bits. Local magnetic fields are normally used to coherently manipulate the state of spin; however, electrical manipulation would allow for fast switching and spatially confined spin control. Here, we propose demonstrate coherent single electric only. Because there is no direct coupling between field, make use hyperfine Stark effect as field transducer at atomic level. This...
The possibility to graft nano-objects directly on its surface makes graphene particularly appealing for device and sensing applications. Here we report the design realization of a novel made by nanoconstriction decorated with TbPc2 magnetic molecules (Pc = phthalocyananine), electrically detect magnetization reversal in proximity graphene. A magnetoconductivity signal as high 20% is found spin reversal, revealing uniaxial anisotropy quantum magnets. These results depict behavior...
Quantum algorithms use the principles of quantum mechanics, such as, for example, superposition, in order to solve particular problems outperforming standard computation. They are developed cryptography, searching, optimization, simulation, and solving large systems linear equations. Here, we implement Grover's algorithm, proposed find an element unsorted list, using a single nuclear 3/2 spin carried by Tb ion sitting molecular magnet transistor. The coherent manipulation this multilevel...
We present a systematic study of metal−organic honeycomb lattices assembled from simple ditopic molecular bricks and Co atoms on Ag(111). This approach enables us to fabricate size- shape-controlled open nanomeshes with pore dimensions up 5.7 nm. The networks are thermally robust while extending over μm2 large areas as single domains. They shape resistant in the presence further deposited materials represent templates organize guest species realize rotary systems.
ConspectusThe covalent linking of acetylene compounds is an important synthetic tool to control carbon–carbon bond formation and has been extensively studied for more than a century. Notably, Glaser coupling subsequently developed refined procedures present route the fabrication distinct carbon-based scaffolds incorporating units with both sp2- sp-hybridizations, such as carbyne chains, or two-dimensional (2D) graphyne graphdiyne networks. However, realization envisioned regular...
Self-assembly techniques allow for the fabrication of highly organized architectures with atomic-level precision. Here, we report on molecular-level scanning tunneling microscopy observations demonstrating supramolecular engineering complex, regular, and long-range ordered periodic networks a surface atomic lattice using simple linear molecular bricks. The length variation employed de novo synthesized dicarbonitrile polyphenyl molecules translates to distinct changes bonding motifs that lead...
Surface-assisted covalent synthesis currently evolves into an important approach for the fabrication of functional nanostructures at interfaces. Here, we employ scanning tunneling microscopy to investigate homocoupling reaction linear, terminal alkyne-functionalized polyphenylene building-blocks on noble metal surfaces under ultrahigh vacuum. On flat Ag(111) surface, thermal activation triggers a variety side-reactions resulting in irregularly branched polymeric networks. Upon alignment...
We investigate the interaction of TbPc(2) single molecule magnets (SMMs) with ferromagnetic Ni substrates. Using element-resolved x-ray magnetic circular dichroism, we show that couples antiferromagnetically to films through ligand-mediated superexchange. This coupling is strongly anisotropic and can be manipulated by doping interface electron acceptor or donor atoms. observe relative orientation substrate anisotropy axes critically affects SMM behavior. complexes deposited on...
TbPc2 single-molecule magnets adsorbed on a magnesium oxide tunnel barrier exhibit record magnetic remanence, hysteresis opening, perfect out-of-plane alignment of the easy axes, and self-assembly into well-ordered layer. As service to our authors readers, this journal provides supporting information supplied by authors. Such materials are peer reviewed may be re-organized for online delivery, but not copy-edited or typeset. Technical support issues arising from (other than missing files)...
The magnetic properties of isolated TbPc2 molecules supported on a Cu(100) surface are investigated by X-ray circular dichroism at 8 K in fields up to 5 T. crystal field and single found be robust upon adsorption metal substrate. Tb moment has Ising-like magnetization; XMCD spectra combined with multiplet calculations show that the saturation orbital spin values reach 3 6 μB, respectively.
A surface-supported open metal-organic nanomesh featuring a 24 nm(2) cavity size and extending to mum domains was fabricated by Co-directed assembly of para-hexaphenyl-dicarbonitrile linker molecules in two dimensions. The metallosupramolecular lattice is thermally robust resides fully commensurate on the employed Ag(111) substrate as directly verified high-resolution scanning tunneling microscopy observations.
The tessellation of the Euclidean plane by regular polygons has been contemplated since ancient times and presents intriguing aspects embracing mathematics, art, crystallography. Significant efforts were devoted to engineer specific 2D interfacial tessellations at molecular level, but periodic patterns with distinct five-vertex motifs remained elusive. Here, we report a direct scanning tunneling microscopy investigation on cerium-directed assembly linear polyphenyl linkers terminal...
We built new hybrid devices consisting of chemical vapor deposition (CVD) grown carbon nanotube (CNT) transistors, decorated with TbPc2 (Pc = phthalocyanine) rare-earth based single-molecule magnets (SMMs). The drafting was achieved by tailoring supramolecular π-π interactions between CNTs and SMMs. magnetoresistance hysteresis loop measurements revealed steep steps, which we can relate to the magnetization reversal individual Indeed, established that electronic transport properties these...
Abstract The novel functionalized porphyrin [5,15‐bis(ethynyl)‐10,20‐diphenylporphinato]copper(II) (CuDEPP) was used as electrodes for rechargeable energy‐storage systems with an extraordinary combination of storage capacity, rate capability, and cycling stability. ability CuDEPP to serve electron donor or acceptor supports various applications. Combined a lithium negative electrode, the electrode exhibited long cycle life several thousand cycles fast charge–discharge rates up 53 C specific...
Graphyne (GY) and graphdiyne (GDY)-based monolayers represent the next generation 2D carbon-rich materials with tunable structures properties surpassing those of graphene. However, detection band formation in atomically thin GY/GDY analogues has been challenging, as both long-range order atomic precision have to be fulfilled system. The present work reports direct evidence on-surface synthesized metallated Ag-GDY sheets mesoscopic (≈1 µm) regularity. Employing scanning tunneling...
Lanthanide metal clusters excel in combining molecular and material chemistry properties. Here, we report an efficient cooperative sensitization UC phenomenon of a Eu3+/Yb3+ nonanuclear lanthanide cluster CD3OD. The synthesis characterization the heteronuclear solid state solution are described together with showing Eu3+ luminescence visible region upon 980 nm NIR excitation Yb3+ at concentrations as low 100 nM. Alongside being Eu/Yb to display (with quantum yield value 4.88 × 10–8 1.13 W...
We report the preparation and characterization of monolayer graphene decorated with functionalized single-molecule magnets (SMMs). The grafting ligands provide a homogeneous selective deposition on graphene. is characterized by combined Raman microspectroscopy, atomic force microscopy (AFM), electron transport measurements. observe surface-enhanced signal that allowed us to study down limit few isolated molecules. weak interaction through charge transfer in agreement ab initio DFT...