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Ornago, L. (author), Zwick, Patrick (author), van der Poel, S. (author), Brandl, Thomas (author), El Abbassi, M. (author), Perrin, Mickael L. (author), Dulić, Diana (author), van der Zant, H.S.J. (author), Mayor, Marcel (author)The addition of a lateral alkyl chain is a well-known strategy to reduce π-stacked ensembles of molecules in solution, with the intention to minimize the interactions between the molecules’ backbones. In this paper, we study whether this concept generalizes to single-molecule junctions by using a combination of mechanically controllable break...journal article 2024
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van Veen, F. (author), Ornago, L. (author), van der Zant, H.S.J. (author), El Abbassi, M. (author)Break-junction experiments are used to statistically study the electronic properties of individual molecules. The measurements consist of repeatedly breaking and merging a gold wire while measuring the conductance as a function of displacement. When a molecule is captured, a plateau is observed in the conductance traces otherwise exponentially...journal article 2023
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Hsu, C. (author), Rohde, Michael (author), Borin Barin, Gabriela (author), Gandus, Guido (author), Passerone, Daniele (author), Luisier, Mathieu (author), Ruffieux, Pascal (author), Fasel, Roman (author), van der Zant, H.S.J. (author), El Abbassi, M. (author)Creating a good contact between electrodes and graphene nanoribbons (GNRs) has been a long-standing challenge in searching for the next GNR-based nanoelectronics. This quest requires the controlled fabrication of sub-20 nm metallic gaps, a clean GNR transfer minimizing damage and organic contamination during the device fabrication, as well as...journal article 2023
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Van Veen, Frederik H. (author), Ornago, L. (author), van der Zant, H.S.J. (author), El Abbassi, M. (author)Alkanes serve an important role as benchmark system in molecular electronics. However, a large variation in the conductance values is reported in the literature. To better understand these fluctuations, in this study we measure large molecular data sets (up to 100 000 breaking traces) of a series of alkanes with different lengths and...journal article 2022
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Ornago, L. (author), Kamer, Jerry (author), El Abbassi, M. (author), Grozema, F.C. (author), van der Zant, H.S.J. (author)Switching effects are key elements in the design and characterization of nanoscale molecular electronics systems. They are used to achieve functionality through the transition between different conducting states. In this study, we analyze the presence of switching events in reference molecular systems, which are not designed to have switching...journal article 2022
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El Abbassi, M. (author), Lahaye, D.J.P. (author), Vuik, Cornelis (author)One of the quickest ways to influence both the wall temperature and thermal NOx emissions in rotary kilns is to change the air–fuel ratio (AFR). The normalized counterpart of the AFR, the equivalence ratio, is usually associated with premixed flames and studies of its influence on diffusion flames are inconsistent, depending on the application....journal article 2021
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Lahaye, D.J.P. (author), El Abbassi, M. (author), Vuik, Cornelis (author), Talice, Marco (author), Juretic, F. (author)This work studies how non-premixed turbulent combustion in a rotary kiln depends on the<br/>geometry of the secondary air inlet channel. We target a kiln in which temperatures can reach values above 1800 degrees Kelvin. Monitoring and possible mitigation of the thermal nitric-oxide (NOx) formation is of utmost importance. The performed reactive...journal article 2021
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Braun, Oliver (author), Overbeck, Jan (author), El Abbassi, M. (author), Käser, Silvan (author), Furrer, Roman (author), Olziersky, Antonis (author), Flasby, Alexander (author), Borin Barin, Gabriela (author), Perrin, M.L. (author)Atomically precise graphene nanoribbons (GNRs) are a promising emerging class of designer quantum materials with electronic properties that are tunable by chemical design. However, many challenges remain in the device integration of these materials, especially regarding contacting strategies. We report on the device integration of uniaxially...journal article 2021
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Stefani, D. (author), Guo, Cunlan (author), Ornago, L. (author), Cabosart, D.C.N. (author), El Abbassi, M. (author), Sheves, Mordechai (author), Cahen, David (author), van der Zant, H.S.J. (author)We report on charge transport across single short peptides using the Mechanically Controlled Break Junction (MCBJ) method. We record thousands of electron transport events across single-molecule junctions and with an unsupervised machine learning algorithm, we identify several classes of traces with multifarious conductance values that may...journal article 2021
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El Abbassi, M. (author), Overbeck, Jan (author), Braun, Oliver (author), Calame, Michel (author), van der Zant, H.S.J. (author), Perrin, M.L. (author)Unsupervised machine learning, and in particular data clustering, is a powerful approach for the analysis of datasets and identification of characteristic features occurring throughout a dataset. It is gaining popularity across scientific disciplines and is particularly useful for applications without a priori knowledge of the data structure....journal article 2021
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El Abbassi, M. (author), Lahaye, D.J.P. (author), Vuik, Cornelis (author)This paper verifies a mathematical model that is developed for the open source CFD-toolbox OpenFOAM, which couples turbulent combustion with conjugate heat transfer. This feature already exists in well-known commercial codes. It permits the prediction of the flame’s characteristics, its emissions, and the consequent heat transfer between...conference paper 2021
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Liu, Yuru (author), Ornago, L. (author), Carlotti, Marco (author), Ai, Yong (author), El Abbassi, M. (author), Soni, Saurabh (author), Asyuda, Andika (author), Zharnikov, Michael (author), van der Zant, H.S.J. (author), Chiechi, Ryan C. (author)This paper describes the conductance of single-molecules and self-assembled monolayers comprising an oligophenyleneethynylene core, functionalized with acenes of increasing length that extend conjugation perpendicular to the path of tunneling electrons. In the Mechanically Controlled Break Junction (MCBJ) experiment, multiple conductance...journal article 2020
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Zwick, Patrick (author), Hsu, C. (author), El Abbassi, M. (author), Fuhr, Olaf (author), Fenske, Dieter (author), Dulic, D. (author), van der Zant, H.S.J. (author), Mayor, Marcel (author)Porphyrin cyclophane 1, consisting of two rigidly fixed but still movable cofacial porphyrins and exposing acetate-masked thiols in opposed directions of the macrocycle, is designed, synthesized, and characterized. The functional cyclophane 1, as pioneer of mechanosensitive 3D materials, forms stable single-molecule junctions in a...journal article 2020
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El Abbassi, M. (author), Perrin, M.L. (author), Barin, Gabriela Borin (author), Sangtarash, Sara (author), Overbeck, Jan (author), Braun, Oliver (author), Lambert, Colin J. (author), Sun, Qiang (author), Prechtl, Thorsten (author)Graphene nanoribbons (GNRs) have attracted strong interest from researchers worldwide, as they constitute an emerging class of quantum-designed materials. The major challenges toward their exploitation in electronic applications include reliable contacting, complicated by their small size (<50 nm), and the preservation of their physical...journal article 2020
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El Abbassi, M. (author), Sangtarash, Sara (author), Liu, Xunshan (author), Perrin, M.L. (author), Braun, Oliver (author), Lambert, Colin (author), van der Zant, H.S.J. (author), Yitzchaik, Shlomo (author), Decurtins, Silvio (author)One of the main challenges to upscale the fabrication of molecular devices is to achieve a mechanically stable device with reproducible and controllable electronic features that operates at room temperature1,2. This is crucial because structural and electronic fluctuations can lead to significant changes in the transport characteristics at...journal article 2019
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Cabosart, D.C.N. (author), El Abbassi, M. (author), Stefani, D. (author), Frisenda, Riccardo (author), Calame, Michel (author), van der Zant, H.S.J. (author), Perrin, M.L. (author)Single-molecule break-junction measurements are intrinsically stochastic in nature, requiring the acquisition of large datasets of “breaking traces” to gain insight into the generic electronic properties of the molecule under study. For example, the most probable conductance value of the molecule is often extracted from the conductance...journal article 2019
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Brandl, Thomas (author), El Abbassi, M. (author), Stefani, D. (author), Frisenda, R. (author), Harzmann, Gero D. (author), van der Zant, H.S.J. (author), Mayor, Marcel (author)A new concept to improve the reliability of functional single molecule junctions is presented using the E-field triggered switching of Fe<sup>II</sup>bis-terpyridine complexes in a mechanically controlled break junction experiment as model system. The complexes comprise a push-pull ligand sensing the applied E-field and the resulting...journal article 2019
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El Abbassi, M. (author), Zwick, Patrick (author), Rates, Alfredo (author), Stefani, D. (author), Prescimone, Alessandro (author), Mayor, Marcel (author), van der Zant, H.S.J. (author), Dulić, Diana (author)Porphyrin derivatives are key components in natural machinery enabling us to store sunlight as chemical energy. In spite of their prominent role in cascades separating electrical charges and their potential as sensitizers in molecular devices, reports concerning their electronic transport characteristics are inconsistent. Here we report a...journal article 2019
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El Abbassi, M. (author), Dimas Ramadhan Abdillah Fikri, Dimas (author), Lahaye, D.J.P. (author), Vuik, Cornelis (author)The wish to reduce the environmental footprint and to enhance economic gains of rotary kilns pushes the numerical simulation of combustion to include conjugate heat transfer. In this paper we study the influence of the refractory wall and radiative heat loss to the ambient, on the combustion process of a reference kiln model. Numerical results...conference paper 2018
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García-Suárez, Víctor M. (author), García-Fuente, Amador (author), Carrascal, Diego J. (author), Burzuri Linares, E. (author), Koole, M. (author), van der Zant, H.S.J. (author), El Abbassi, Maria (author), Calame, Michel (author), Ferrer, Jaime (author)We analyse the electrical response of narrow graphene nanogaps in search for transport signatures stemming from spin-polarized edge states. We find that the electrical transport across graphene nanogaps having perfectly defined zigzag edges does not carry any spin-related signature. We also analyse the magnetic and electrical properties of...journal article 2018