M. S. Jagadeesh

Preserving chemical reactivity on oxygen-passivated Fe via axial coordination to an ordered ZnTPP monolayer

Guglielmo Albani, Francesco Goto, Alberto Calloni, Gianlorenzo Bussetti et autres

The preservation of molecular reactivity on catalytic surfaces is one of the main key challenges in the fabrication of ordered organic–inorganic hybrid architectures. In this work, we investigate the behavior of a prototypical reactive molecule: a bromo-substituted naphthalimide derivative (Br-PNI) deposited in …

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Epitaxial Growth: Out‐Of‐Plane Metal Coordination for a True Solvent‐Free Building with Molecular Bricks: Dodging the Surface Ligand Effect for On‐Surface Vacuum Self‐Assembly (Adv. Funct. Mater. 20/2021)

Alessio Orbelli Biroli, Alberto Calloni, Alberto Bossi, M. S. Jagadeesh et autres

In article number 2011008, Alberto Bossi, Gianlorenzo Bussetti, and co-workers present a coherent layered film grown on an archetypal Fe metal electrode. The ingredients for the controlled in-vacuum self assembly are chemical decoupling of the contact interface, lateral (2D) ordering of the …

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Out‐Of‐Plane Metal Coordination for a True Solvent‐Free Building with Molecular Bricks: Dodging the Surface Ligand Effect for On‐Surface Vacuum Self‐Assembly

Alessio Orbelli Biroli, Alberto Calloni, Alberto Bossi, M. S. Jagadeesh et autres

Abstract The desirable self‐assembly (SA) of repeated 2D stacked layers requires a “holistic analysis” of three interconnected components: the electrode, the interface, and the molecular component; among them, the contact interface bears the largest burden responsibilities. Epitaxial growth (EG) of coherent 2D+n …

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Ordered Porphyrin Arrays on Fe(001): An Enabling Technology for Future Spintronics

Guglielmo Albani, Alberto Calloni, M. S. Jagadeesh, A. Brambilla et autres

We give evidence of the formation of an ordered array of tetra-phenyl porphyrins (TPP) when these molecules are deposited on top of oxygen-passivated Fe(001), namely the Fe(001)-p(1 × 1)O surface. We also prove that they are magnetically coupled with the substrate. The …

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Empty electron states in cobalt-intercalated graphene

Alberto Calloni, Gianlorenzo Bussetti, Giulia Avvisati, M. S. Jagadeesh et autres

The dispersion of the electronic states of epitaxial graphene (Gr) depends significantly on the strength of the bonding with the underlying substrate. We report on empty electron states in cobalt-intercalated Gr grown on Ir(111), studied by angle-resolved inverse photoemission spectroscopy and x-ray …

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Modification of large area Cu2O/CuO photocathode with CuS non-noble catalyst for improved photocurrent and stability

Gabriele Panzeri, Matteo Cristina, M. S. Jagadeesh, Gianlorenzo Bussetti et autres

Abstract In this work, a three-layered heterostructure Cu2O/CuO/CuS was obtained through a low-cost and large-area fabrication route comprising electrodeposition, thermal oxidation, and reactive annealing in a sulfur atmosphere. Morphological, microstructural, and compositional analysis (AFM, SEM, XRD, EDS, XPS) were carried out to …

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Interaction of ultra-thin CoTPP films on Fe(001) with oxygen: Interplay between chemistry, order, and magnetism

Guglielmo Albani, Alberto Calloni, M. S. Jagadeesh, Marco Finazzi et autres

This work focuses on the stability against the oxidation of the chemical, structural, and magnetic properties of the system consisting of a layer of Co tetra-phenyl porphyrins grown on the top of Fe(001) – p(1 × 1)O. Such a system is characterized …

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Electronic structure and magnetic behavior of ultra-thin Fe films grown on W(110) with a Co buffer layer

Alberto Calloni, M. S. Jagadeesh, Maurizio Zani, Lamberto Duò et autres

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Electrochemically deposited poly(selenophene)-fullerene photoactive layer: Tuning of the spectroscopic properties towards visible light-driven generation of singlet oxygen

Aleksandra Nyga, Radosław Motyka, Gianlorenzo Bussetti, Alberto Calloni et autres

A selenophene-containing fullerene dyad (C60Se) was electrochemically co-deposited with bis-selenophene (BisSe) to form a visible light absorbing poly(selenophene) layer with incorporated fullerene photosensitizers on platinum (Pt) or indium-tin oxide (ITO) substrates. The resulting photoactive films (P(C60Se_BisSe)) were characterized by cyclic voltammetry, UV–Vis, …

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Electronic and magnetic properties of thin and ultra-thin Co(Ni)-TPP molecular films on Fe(001)-p(1x1)O

M. S. Jagadeesh

La molecola di metallo tetrafenil porfirina (M-TPP) appartiene a una vasta classe di molecole presenti in natura. Ha attratto molto interesse tra i ricercatori per caratteristiche come la sua struttura ad anello planare (anello tetrapirrolico), che forma una cavita interna racchiusa da …

Persistence of the Co-tetra-phenyl-porphyrin HOMO-LUMO features when a single organic layer is grown onto Cu(1 1 0)-(2 × 1)O

Gianlorenzo Bussetti, Guglielmo Albani, Alberto Calloni, M. S. Jagadeesh et autres

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Ordered assembling of Co tetra phenyl porphyrin on oxygen-passivated Fe(001): from single to multilayer films

Alberto Calloni, M. S. Jagadeesh, Guglielmo Albani, C. Goletti et autres

Tetra-phenyl prophyrins (TPP) are an interesting class of organic molecules characterized by a ring structure with a metal ion in their centre. An ordered growth of such molecules can be obtained even on metallic substrates by means of a proper modification of …

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