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Hsu, C. (author), Frisenda, Riccardo (author), Schmidt, Robert (author), Arora, Ashish (author), de Vasconcellos, Steffen Michaelis (author), Bratschitsch, Rudolf (author), van der Zant, H.S.J. (author), Castellanos-Gomez, Andres (author)An interesting aspect of 2D materials is the change of their electronic structure with the reduction of thickness. Molybdenum and tungsten-based transition metal dichalcogenides form an important family of 2D materials, whose members show a thickness-dependent bandgap and strong light–matter interaction. In this work, the experimental...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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Papadopoulos, N. (author), Watanabe, Kenji (author), Taniguchi, Takashi (author), van der Zant, H.S.J. (author), Steele, G.A. (author)We present measurements of weak localization on hexagonal boron nitride encapsulated bilayer MoS2. From the analysis we obtain information regarding the phase coherence and the spin diffusion of the electrons. We find that the encapsulation with boron nitride provides higher mobilities in the samples, and the phase coherence shows improvement...journal article 2019
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Dugay, J. (author), Giménez-Marqués, Mónica (author), Venstra, W.J. (author), Torres-Cavanillas, Ramón (author), Sheombarsing, U.N. (author), Manca, N. (author), Coronado, Eugenio (author), van der Zant, H.S.J. (author)In the past years, the use of highly sensitive silicon microelectromechanical cantilevers has been proposed as a tool to characterize the spin-crossover phenomenon by employing fast optical readout of the motion. In this work, Fe <sup>II</sup> -based spin-crossover nanoparticles of the well-known [Fe(Htrz) <sub>2</sub> (trz)](BF <sub>4</sub>...journal article 2019
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de Bruijckere, J. (author), Gehring, P. (author), Palacios-Corella, M. (author), Coronado, E. (author), Paaske, J. (author), Hedegård, P. (author), van der Zant, H.S.J. (author)It is known that the quantum mechanical ground state of a nanoscale junction has a significant impact on its electrical transport properties. This becomes particularly important in transistors consisting of a single molecule. Because of strong electron-electron interactions and the possibility of accessing ground states with high spins, these...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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Lehner, B. (author), Janssen, V.A.E.C. (author), Spiesz, E.M. (author), Benz, D. (author), Brouns, S.J.J. (author), Meyer, Anne S. (author), van der Zant, H.S.J. (author)Graphene's maximized surface-to-volume ratio, high conductance, mechanical strength, and flexibility make it a promising nanomaterial. However, large-scale graphene production is typically cost-intensive. This manuscript describes a microbial reduction approach for producing graphene that utilizes the bacterium Shewanella oneidensis in...journal article 2019
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Dolleman, R.J. (author), Hsu, Z. (author), Vollebregt, S. (author), Sader, John E. (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author), Ghatkesar, M.K. (author)Current wafer-scale fabrication methods for graphene-based electronics and sensors involve the transfer of single-layer graphene by a support polymer. This often leaves some polymer residue on the graphene, which can strongly impact its electronic, thermal, and mechanical resonance properties. To assess the cleanliness of graphene fabrication...journal article 2019
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Labra Muñoz, J. (author), Konstantinović, Zorica (author), Balcells, Lluis (author), Pomar, Alberto (author), van der Zant, H.S.J. (author), Dulić, Diana (author)We report on the fabrication and measurements of platinum-self-aligned nanogap devices containing cubed iron (core)/iron oxide (shell) nanoparticles (NPs) with two average different sizes (13 and 17 nm). The nanoparticles are deposited by means of a cluster gun technique. Their trapping across the nanogap is demonstrated by comparing the...journal article 2019
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Siskins, M. (author), Lee, M. (author), Alijani, F. (author), Van Blankenstein, Mark R. (author), Davidovikj, D. (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author)Two-dimensional (2D) materials with strong in-plane anisotropy are of interest for enabling orientation-dependent, frequency-tunable, optomechanical devices. However, black phosphorus (bP), the 2D material with the largest anisotropy to date, is unstable as it degrades in air. In this work we show that As<sub>2</sub>S<sub>3</sub> is an...journal article 2019
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Meysman, F.J.R. (author), Cornelissen, Rob (author), Trashin, Stanislav (author), Bonné, Robin (author), van der Veen, J.R. (author), Blom, C.J. (author), Beaumont, H.J.E. (author), van der Zant, H.S.J. (author), Boschker, H.T.S. (author)Biological electron transport is classically thought to occur over nanometre distances, yet recent studies suggest that electrical currents can run along centimetre-long cable bacteria. The phenomenon remains elusive, however, as currents have not been directly measured, nor have the conductive structures been identified. Here we demonstrate...journal article 2019
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Gehring, P. (author), van der Star, M. (author), Evangeli, Charalambos (author), Le Roy, Jennifer J. (author), Bogani, Lapo (author), Kolosov, Oleg V. (author), van der Zant, H.S.J. (author)The energy dependent thermoelectric response of a single molecule contains valuable information about its transmission function and its excited states. However, measuring it requires devices that can efficiently heat up one side of the molecule while being able to tune its electrochemical potential over a wide energy range. Furthermore, to...journal article 2019
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Lee, M. (author), Davidovikj, D. (author), Sajadi, B. (author), Siskins, M. (author), Alijani, F. (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author)Despite theoretical predictions that graphene should be impermeable to all gases, practical experiments on sealed graphene nanodrums show small leak rates. Thus far, the exact mechanism for this permeation has remained unclear, because different potential leakage pathways have not been studied separately. Here, we demonstrate a sealing method...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), 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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Gehring, P. (author), Thijssen, J.M. (author), van der Zant, H.S.J. (author)Single-molecule junctions — devices in which a single molecule is electrically connected by two electrodes — enable the study of a broad range of quantum-transport phenomena even at room temperature. These quantum features are related to molecular orbital and spin degrees of freedom and are characterized by various energy scales that can be...review 2019
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Papadopoulos, N. (author), Flores, Eduardo (author), Watanabe, Kenji (author), Taniguchi, Takashi (author), Ares, Jose R. (author), Sanchez, Carlos (author), Ferrer, Isabel J. (author), Castellanos-Gomez, Andres (author), Steele, G.A. (author), van der Zant, H.S.J. (author)We have studied electrical transport as a function of carrier density, temperature and bias in multi-terminal devices consisting of hexagonal boron nitride (h-BN) encapsulated titanium trisulfide (TiS<sub>3</sub>) sheets. Through the encapsulation with h-BN, we observe metallic behavior and high electron mobilities. Below ∼60 K an increase in...journal article 2019
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Dolleman, R.J. (author), Belardinelli, P. (author), Houri, S. (author), van der Zant, H.S.J. (author), Alijani, F. (author), Steeneken, P.G. (author)Stochastic switching between the two bistable states of a strongly driven mechanical resonator enables detection of weak signals based on probability distributions, in a manner that mimics biological systems. However, conventional silicon resonators at the microscale require a large amount of fluctuation power to achieve a switching rate in the...journal article 2019
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Zwick, Patrick (author), Weiland, Kevin J. (author), Malinčík, Juraj (author), Stefani, D. (author), Häussinger, Daniel (author), van der Zant, H.S.J. (author), Dulić, Diana (author), Mayor, Marcel (author)The bowl-shaped, 3-fold interlinked porphyrin dimer 2 was obtained in respectable yields during macrocyclization attempts. Its bicyclic structure, consisting of a macrocycle made of a pair of acetylene interlinked tetraphenylporphyrins which are additionally linked by a C-C bond interlinking two pyrrole subunits, has been confirmed...journal article 2019
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Manca, N. (author), Mattoni, G. (author), Pelassa, Marco (author), Venstra, W.J. (author), van der Zant, H.S.J. (author), Caviglia, A. (author)Strain engineering is one of the most effective approaches to manipulate the physical state of materials, control their electronic properties, and enable crucial functionalities. Because of their rich phase diagrams arising from competing ground states, quantum materials are an ideal playground for on-demand material control and can be used...journal article 2019