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In Situ EC-STM Study and DFT Modeling of the Adsorption of Glycerol on Cu(111) in NaOH Solution Vrije Universiteit Brussel

Shoshan Abrahami, Fatah Chiter, Lorena H. Klein, Vincent Maurice, Herman Terryn, Dominique Costa, Philippe Marcus

Organic coatings are often required for the protection of metals against environmental degradation. Despite their extensive use, only limited information is available on the initial stages of adsorption and formation of protective films, especially at the molecular and atomic levels. As a model system for coating formation, this study investigates the adsorption of glycerol molecules on the single-crystalline Cu(111) surface. A combined ...

Use of Local Electrochemical Methods (SECM, EC-STM) and AFM to Differentiate Microstructural Effects (EBSD) on Very Pure Copper Vrije Universiteit Brussel Ghent University

Esther Martinez Lombardia, Linsey Lapeire, Vincent Maurice, Iris De Graeve, Lorena Klein, Philippe Marcus, Kim Verbeken, Leo Kestens, Yaiza Gonzalez-Garcia, Arjan Mol, et al.

Self-assembling of S-Glutamic acid an Ag(100): a combined LT-STM and Ab Initio Investigation Vrije Universiteit Brussel

Frederik Tielens, M. Smerieri, L. Vattuone, D. Costa, L. Savio

Covalent and non-covalent functionalization of graphitic substrates under electrochemical control KU Leuven

Zhi Li

This project aims to study the formatin of highly ordered patterns f molecules on graphitic surfaces, in which the target molecules are anchored by covalent bonds. this is achieved in a two-step process in which self-assembly of suitable molecules at the solid-liquid interface is followed by an electrochemically triggered reacton that anchors the molecules to the surface. The details f the process will be studied by scannin probe techniques and ...

A microscopic view on the electrochemical deposition and dissolution of Au with scanning electrochemical cell microscopy – Part II Vrije Universiteit Brussel

Miguel Bernal, Sorour Semsari Parapari, Leonardo Bertolucci Coelho, Miran Čeh, Sašo Šturm, Jon Ustarroz

The electrochemical oxidation of gold nanoparticles (NPs) has been examined in H2SO4 and acidified NaCl by combining multiple techniques including scanning electrochemical cell microscopy (SECCM) and in-situ electrochemical transmission electron microscopy (EC-TEM). Our findings provide novel insights into the intricate oxidation dynamics of Au NPs, which are determined by the interplay between passivation and dissolution. SECCM ...

Mental Well-Being and the Eco-State: A Classification of Regions and Countries of the European Union Vrije Universiteit Brussel

Paola E. Signoretta, Veerle Buffel, Piet Bracke

This chapter reports exploratory research work on the link between mental well-being and the ‘eco-state’ within the context of countries and regions of the European Union (EU). For the purpose of this chapter, the ‘eco-state’ is defined—paraphrasing Meadowcroft (2005: 3)—as “a state that places [climate change] considerations at the core of its activities”. It is hypothesized that regions with higher levels of mental well-being are located in ...

Nanoconfined self-assembly on a grafted graphitic surface under electrochemical control KU Leuven

Thi Mien Trung Huynh, Thanh Hai Phan, Oleksandr Ivasenko, Stijn Mertens, Steven De Feyter

Highly oriented pyrolytic graphite (HOPG) can be covalently grafted with aryl radicals generated via the electrochemical reduction of 3,5-bis-tert-butyl-diazonium cations (3,5-TBD). The structure of the grafted layer and its stability under electrochemical conditions were assessed with electrochemical scanning tunneling microscopy (EC-STM) and cyclic voltammetry (CV). Stable within a wide (>2.5 V) electrochemical window, the grafted species ...

Supramolecular templates at the solid-liquid interface KU Leuven

Controlling the adsorption and structural transition of organic molecule s on solid surfaces is of fundamental and technological significance. Po lycyclic aromatic compounds in particular are promising as active materi als in supramolecular electronic and optoelectronic devices, because the electronic properties of their flat conjugated systems can be varied dr amatically through synthetic modification of their size and topologies. In this ...

Potential-driven molecular tiling of a charged polycyclic aromatic compound KU Leuven

Kang Cui, Oleksandr Ivasenko, Kunal Mali, Steven De Feyter, Stijn Mertens

Using in situ electrochemical scanning tunnelling microscopy (EC-STM), we demonstrate fully reversible tuning of molecular tiling between selfassembled structures with supramolecular motifs containing 2, 3, 4, 6 or 7 tectons. The structures can be explained by electrocompression of the cationic adlayer at the solid–liquid interface.

A Single-side Fabricated Tri-axis (111)-Silicon Micro-Accelerometer with electromechanical Sigma-delta Modulation KU Leuven

Michael Kraft

This paper presents a novel single-side (111)-silicon (non-SOI) fabricated triaxis capacitive microaccelerometer with a dual quantization electromechanical sigma-delta modulator (EM-ΣΔM) interface circuit. The fully CMOS compatible single-sided micromachining process with toroidal shaped electrical isolation structures is described. A 2.6 mm × 2.6 mm sized triaxis accelerometer was designed and fabricated using only the front side of a 4-in ...

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