A5066017824- Molecular Junctions and Nanostructures
- Surface Chemistry and Catalysis
- Porphyrin and Phthalocyanine Chemistry
- Quantum and electron transport phenomena
- Magnetism in coordination complexes
- Surface and Thin Film Phenomena
- Magnetic properties of thin films
- Force Microscopy Techniques and Applications
- Advanced Chemical Physics Studies
- Machine Learning in Materials Science
- Graphene research and applications
- Physics of Superconductivity and Magnetism
- Metal-Catalyzed Oxygenation Mechanisms
- Advanced Electron Microscopy Techniques and Applications
- Electronic and Structural Properties of Oxides
- Electrostatics and Colloid Interactions
- Nanocluster Synthesis and Applications
- Conducting polymers and applications
- Organic and Molecular Conductors Research
- Advanced Physical and Chemical Molecular Interactions
- Rare-earth and actinide compounds
- Analytical Chemistry and Sensors
- Nanowire Synthesis and Applications
- Gas Sensing Nanomaterials and Sensors
- Electron and X-Ray Spectroscopy Techniques
ARC Centre of Excellence in Future Low-Energy Electronics Technologies
2019-2024
Monash University
2018-2024
Centre for Quantum Computation and Communication Technology
2021
The University of Melbourne
2021
Institut Català de Nanociència i Nanotecnologia
2010-2015
Institut de Nanociència i Nanotecnologia de la Universitat de Barcelona
2013
Universitat Autònoma de Barcelona
2013
Consejo Superior de Investigaciones Científicas
2011
We present a systematic investigation of molecule-metal interactions for transition-metal phthalocyanines (TMPc, with TM = Fe, Co, Ni, Cu) adsorbed on Ag(100). Scanning tunneling spectroscopy and density functional theory provide insight into the charge transfer hybridization mechanisms TMPc as function increasing occupancy 3$d$ metal states. show that all four receive approximately one electron from substrate. Charge occurs substrate to molecules, inducing reorganization in FePc CoPc, while...
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...
Abstract Scanning probe microscopy (SPM) has revolutionized the fields of materials, nano-science, chemistry, and biology, by enabling mapping surface properties manipulation with atomic precision. However, these achievements require constant human supervision; fully automated SPM not been accomplished yet. Here we demonstrate an artificial intelligence framework based on machine learning for autonomous operation (DeepSPM). DeepSPM includes algorithmic search good sample regions, a...
We study the electronic mechanisms underlying induction and propagation of chirality in achiral molecules deposited on surfaces. Combined scanning tunneling microscopy ab initio structure calculations Cu-phthalocyanines adsorbed Ag(100) reveal formation chiral molecular orbitals structurally undistorted molecules. This effect shows that can be manifest exclusively at level due to asymmetric charge transfer between substrate. Single molecule correlates with attractive van der Waals...
The spin state of organic-based magnets at interfaces is to a great extent determined by the organic environment and nature spin-carrying metal center, which further subject modifications adsorbate-substrate coupling. Direct chemical doping offers an additional route for tailoring electronic magnetic characteristics molecular magnets. Here we present systematic investigation effects alkali on charge crystal field 3d ions in Cu, Ni, Fe, Mn phthalocyanine (Pc) monolayers adsorbed Ag. Combined...
We investigate the possibility to induce exchange bias between single molecule magnets (SMM) and metallic or oxide antiferromagnetic substrates. Element-resolved X-ray magnetic circular dichroism measurements reveal, respectively, presence absence of unidirectional anisotropy for TbPc(2) SMM deposited on Mn CoO layers. thin films present hysteresis a negative horizontal shift Tb magnetization loop after field cooling, consistent with observation pinned spins in layer coupled parallel moment....
Abstract Nanomagnets of controlled size, organized into regular patterns open new perspectives in the fields nanoelectronics, spintronics, and quantum computation. Self‐assembling processes on various types substrates allow designing fine‐structured architectures tuning their magnetic properties. Here, starting from a description fundamental interactions at nanoscale, we review recent experimental approaches to fabricate zero‐, one‐, two‐dimensional particle arrays with dimensions reduced...
Abstract Coordination chemistry relies on harnessing active metal sites within organic matrices. Polynuclear complexes—where ligands bind to several atoms—are relevant due their electronic/magnetic properties and potential for functional reactivity pathways. However, synthesis remains challenging; few geometries configurations have been achieved. Here, we synthesise—via supramolecular a noble surface—one-dimensional metal-organic nanostructures composed of terpyridine (tpy)-based molecules...
Improving the magnetic stability of single-molecule magnets is a key challenge facing molecular spintronics. We use x-ray circular dichroism to explore possibility magnetically stabilizing ${\mathrm{TbPc}}_{2}$ molecules by attaching them ultrathin Fe and FeMn films. show that deposited on antiferromagnetic films exhibits hysteresis exchange bias as consequence coupling uncompensated interfacial spins. The FeMn-thickness dependence coercive field similar inorganic...
High-resolution photoemission spectroscopy and realistic ab-initio calculations have been employed to analyze the onset progression of d-sp hybridization in Fe impurities deposited on alkali metal films. The interplay between delocalization, mediated by free-electron environment, Coulomb interaction among d-electrons gives rise complex electronic configurations. multiplet structure a single atom evolves gradually dissolves into quasiparticle peak near Fermi level with increasing host...
Quantum dots (QD) with electric-field-controlled charge state are promising for electronics applications, e.g., digital information storage, single-electron transistors and quantum computing. Inorganic QDs consisting of semiconductor nanostructures or heterostructures often offer limited control on size composition distribution, as well low potential scalability and/or nanoscale miniaturization. Owing to their tunability self-assembly capability, using organic molecules building nano-units...
Supramolecular chemistry protocols applied on surfaces offer compelling avenues for atomic-scale control over organic–inorganic interface structures. In this approach, adsorbate–surface interactions and two-dimensional confinement can lead to morphologies properties that differ dramatically from those achieved via conventional synthetic approaches. Here, we describe the bottom-up, on-surface synthesis of one-dimensional coordination nanostructures based an iron (Fe)-terpyridine (tpy)...
Thin organic films and two-dimensional (2D) molecular assemblies on solid surfaces yield the potential for applications in electronics, optoelectronics, catalysis, sensing. These rely intrinsic electronic properties of hybrid organic/inorganic interface. Here, we investigate energy dispersion 2D states at interface between an atomically thin self-assembled film, comprised flat, noncovalently bonded 9,10-dicyanoanthracene (DCA) molecules, a Ag(111) surface. Using Fourier-transformed scanning...
Thin organic films and two-dimensional (2D) molecular assemblies on solid surfaces yield the potential for applications in electronics, optoelectronics, catalysis, sensing. These rely intrinsic electronic properties of hybrid organic/inorganic interface. Here, we investigate energy dispersion 2D states at interface between an atomically thin self-assembled film, comprised flat, noncovalently bonded 9,10-dicyanoanthracene (DCA) molecules, a Ag(111) surface. Using Fourier-transformed scanning...
Abstract Metalated phthalocyanines (Pc's) are robust and versatile molecular complexes, whose properties can be tuned by changing their functional groups central metal atom. The electronic structure of magnesium Pc (MgPc)—structurally electronically similar to chlorophyll—adsorbed on the Ag(100) surface is investigated low‐temperature scanning tunneling microscopy spectroscopy, non‐contact atomic force microscopy, density theory. Single, isolated MgPc's exhibit a flat, fourfold rotationally...
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