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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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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
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Frisenda, Riccardo (author), Molina-Mendoza, Aday J. (author), Mueller, Thomas (author), Castellanos-Gomez, Andres (author), van der Zant, H.S.J. (author)Recent research in two-dimensional (2D) materials has boosted a renovated interest in the p–n junction, one of the oldest electrical components which can be used in electronics and optoelectronics. 2D materials offer remarkable flexibility to design novel p–n junction device architectures, not possible with conventional bulk semiconductors. In...journal article 2018
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Robust organic radical molecular junctions using acetylene terminated groups for c-au bond formationBejarano, Francesc (author), Olavarria Contreras, I.J. (author), Droghetti, Andrea (author), Rungger, Ivan (author), Rudnev, Alexander (author), Gutiérrez, Diego (author), Mas-Torrent, Marta (author), Veciana, Jaume (author), van der Zant, H.S.J. (author), Burzuri Linares, E. (author)Organic paramagnetic and electroactive molecules are attracting interest as core components of molecular electronic and spintronic devices. Currently, further progress is hindered by the modest stability and reproducibility of the molecule/electrode contact. We report the synthesis of a persistent organic radical bearing one and two terminal...journal article 2018
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Davidovikj, D. (author), Poot, M. (author), Cartamil Bueno, S.J. (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author)For the study and application of graphene membranes, it is essential to have means to control their resonance frequency and temperature. Here, we present an on-chip heater platform for local tuning of in-plane tension in graphene mechanical resonators. By Joule heating of a metallic suspension ring we show thermomechanical resonance frequency...journal article 2018
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Davidovikj, D. (author), Bouwmeester, Damian (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author)We report on the development of a pneumatically coupled graphene membrane system, comprising of two circular cavities connected by a narrow trench. Both cavities and the trench are covered by a thin few-layer graphene membrane to form a sealed dumbbell-shaped chamber. Local electrodes at the bottom of each cavity allow for actuation of each...journal article 2018
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Dolleman, R.J. (author), Houri, S. (author), Chandrashekar, A. (author), Alijani, F. (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author)In the field of nanomechanics, parametric excitations are of interest since they can greatly enhance sensing capabilities and eliminate cross-talk. Above a certain threshold of the parametric pump, the mechanical resonator can be brought into parametric resonance. Here we demonstrate parametric resonance of suspended single-layer graphene...journal article 2018
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Cartamil-Bueno, Santiago J. (author), Davidovikj, D. (author), Centeno, Alba (author), Zurutuza, Amaia (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author), Houri, S. (author)Electro-optic modulators based on micro-electromechanical systems have found success as elements for optical projectors, for simplified optical spectrometers, and as reflective-type screens that make use of light interference (Interferometric Modulator Display technology). The latter concept offers an exciting avenue for graphene...journal article 2018
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Caneva, S. (author), Gehring, P. (author), García-Suárez, Víctor M. (author), García-Fuente, Amador (author), Stefani, D. (author), Olavarria Contreras, I.J. (author), Ferrer, Jaime (author), Dekker, C. (author), van der Zant, H.S.J. (author)The ability to detect and distinguish quantum interference signatures is important for both fundamental research and for the realization of devices such as electron resonators<sup>1</sup>, interferometers<sup>2</sup> and interference-based spin filters<sup>3</sup>. Consistent with the principles of subwavelength optics, the wave nature of...journal article 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
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Papadopoulos, N. (author), Island, J.O. (author), van der Zant, H.S.J. (author), Steele, G.A. (author)Phase engineering of MoS&#x2082; transistors has recently been demonstrated and has led to record low contact resistances. The phase patterning of MoS&#x2082; flakes with laser radiation has also been realized via spectroscopic methods, which invites the potential of controlling the metallic and semiconducting phases of MoS&#x2082...journal article 2018