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Keşkekler, A. (author), Shoshani, Oriel (author), Lee, M. (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author), Alijani, F. (author)Mechanical sources of nonlinear damping play a central role in modern physics, from solid-state physics to thermodynamics. The microscopic theory of mechanical dissipation suggests that nonlinear damping of a resonant mode can be strongly enhanced when it is coupled to a vibration mode that is close to twice its resonance frequency. To date,...journal article 2021
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Zhang, Wenliang (author), Zhao, Qinghua (author), Munuera, Carmen (author), Lee, M. (author), Flores, Eduardo (author), van der Zant, H.S.J. (author), Wang, Tao (author), Frisenda, Riccardo (author), Castellanos-Gomez, Andres (author)Paper holds the promise to replace silicon substrates in applications like internet of things or disposable electronics that require ultra-low-cost electronic components and an environmentally friendly electronic waste management. In the last years, spurred by the abovementioned properties of paper as a substrate and the exceptional...journal article 2021
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Lee, M. (author), Siskins, M. (author), Mañas-Valero, Samuel (author), Coronado, Eugenio (author), Steeneken, P.G. (author), van der Zant, H.S.J. (author)The charge density wave (CDW) state in van der Waals systems shows interesting scaling phenomena as the number of layers can significantly affect the CDW transition temperature, T<sub>CDW</sub>. However, it is often difficult to use conventional methods to study the phase transition in these systems due to their small size and sensitivity to...journal article 2021
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Pyurbeeva, Eugenia (author), Hsu, C. (author), Vogel, David (author), Wegeberg, Christina (author), Mayor, Marcel (author), van der Zant, H.S.J. (author), Mol, Jan A. (author), Gehring, P. (author)Single molecules are nanoscale thermodynamic systems with few degrees of freedom. Thus, the knowledge of their entropy can reveal the presence of microscopic electron transfer dynamics that are difficult to observe otherwise. Here, we apply thermocurrent spectroscopy to directly measure the entropy of a single free radical molecule in a...journal article 2021
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Dolleman, R.J. (author), Chakraborty, Debadi (author), Ladiges, Daniel R. (author), van der Zant, H.S.J. (author), Sader, John E. (author), Steeneken, P.G. (author)The resonance frequency of membranes depends on the gas pressure due to the squeeze-film effect, induced by the compression of a thin gas film that is trapped underneath the resonator by the high-frequency motion. This effect is particularly large in low-mass graphene membranes, which makes them promising candidates for pressure-sensing...journal article 2021
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Reznikova, Ksenia (author), Hsu, C. (author), Schosser, Werner M. (author), Gallego, Almudena (author), Beltako, Katawoura (author), Pauly, Fabian (author), van der Zant, H.S.J. (author), Mayor, Marcel (author)Quantum interference (QI) of electron waves passing through a single-molecule junction provides a powerful means to influence its electrical properties. Here, we investigate the correlation between substitution pattern, conductance, and mechanosensitivity in [2.2]paracyclophane (PCP)-based molecular wires in a mechanically controlled break...journal article 2021
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López-Cabrelles, Javier (author), Mañas-Valero, Samuel (author), Vitórica-Yrezábal, Iñigo J. (author), Siskins, M. (author), Lee, M. (author), Steeneken, P.G. (author), van der Zant, H.S.J. (author), Mínguez Espallargas, Guillermo (author), Coronado, Eugenio (author)Through rational chemical design, and thanks to the hybrid nature of metal-organic frameworks (MOFs), it is possible to prepare molecule-based 2D magnetic materials stable at ambient conditions. Here, we illustrate the versatility of this approach by changing both the metallic nodes and the ligands in a family of layered MOFs that allows the...journal article 2021
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Romijn, J. (author), Dolleman, R.J. (author), Singh, M. (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author), Sarro, Pasqualina M (author), Vollebregt, S. (author)The operating principle of Pirani pressure sensors is based on the pressure dependence of a suspended strip's electrical conductivity, caused by the thermal conductance of the surrounding gas which changes the Joule heating of the strip. To realize such sensors, not only materials with high temperature dependent electrical conductivity are...journal article 2021
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Gehring, P. (author), Sowa, Jakub K. (author), Hsu, C. (author), de Bruijckere, J. (author), van der Star, Martijn (author), Le Roy, Jennifer J. (author), Bogani, Lapo (author), Gauger, Erik M. (author), van der Zant, H.S.J. (author)Theoretical studies suggest that mastering the thermocurrent through single molecules can lead to thermoelectric energy harvesters with unprecedentedly high efficiencies.<sup>1–6</sup> This can be achieved by engineering molecule length,<sup>7</sup> optimizing the tunnel coupling strength of molecules via chemical anchor groups<sup>8</sup> or...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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Azpeitia, Jon (author), Frisenda, Riccardo (author), Lee, M. (author), Bouwmeester, D. (author), Zhang, Wenliang (author), Mompean, Federico (author), van der Zant, H.S.J. (author), Garcia-Hernandez, Mar (author), Castellanos-Gomez, Andres (author)Paper has the potential to dramatically reduce the cost of electronic components. In fact, paper is 10 000 times cheaper than crystalline silicon, motivating the research to integrate electronic materials on paper substrates. Among the different electronic materials, van der Waals materials are attracting the interest of the scientific...journal article 2021
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Dolleman, R.J. (author), Katan, A.J. (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author)Semi-permeable membranes are important elements in water purification and energy generation applications, for which the atomic thickness and strength of graphene can enhance efficiency and permeation rate while maintaining good selectivity. Here, we show that an osmotic pressure difference forms across a suspended graphene membrane as a...journal article 2021
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Dolleman, R.J. (author), Blanter, Y.M. (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author), Verbiest, G.J. (author)Recent experiments have shown surprisingly large thermal time constants in suspended graphene ranging from 10 to 100 ns in drums with a diameter ranging from 2 to 7 μm. The large time constants and their scaling with diameter points toward a thermal resistance at the edge of the drum. However, an explanation of the microscopic origin of this...journal article 2020
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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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Roslon, I.E. (author), Dolleman, R.J. (author), Licona, H. (author), Lee, M. (author), Siskins, M. (author), Lebius, H. (author), Madauß, L. (author), Schleberger, M. (author), Alijani, F. (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author)Porous, atomically thin graphene membranes have interesting properties for filtration and sieving applications. Here, graphene membranes are used to pump gases through nanopores using optothermal forces, enabling the study of gas flow through nanopores at frequencies above 100 kHz. At these frequencies, the motion of graphene is closely...journal article 2020
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Harzheim, A. (author), Könemann, Fabian (author), Gotsmann, Bernd (author), van der Zant, H.S.J. (author), Gehring, P. (author)On-chip temperature sensing on a micro- to nanometer scale is becoming more desirable as the complexity of nanodevices keeps increasing and their downscaling continues. The continuation of this trend makes thermal probing and management more and more challenging. This highlights the need for scalable and reliable temperature sensors, which...journal article 2020
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Lee, M. (author), Mazaheri, Ali (author), van der Zant, H.S.J. (author), Frisenda, Riccardo (author), Castellanos-Gomez, Andres (author)Paper based thermoresistive sensors are fabricated by rubbing WS2 powder against a piece of standard copier paper, like the way a pencil is used to write on paper. The abrasion between the layered material and the rough paper surface erodes the material, breaking the weak van der Waals interlayer bonds, yielding a film of interconnected...journal article 2020
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Frisenda, Riccardo (author), Sanchez-Santolino, Gabriel (author), Papadopoulos, N. (author), Urban, Joanna (author), Baranowski, Michal (author), Surrente, Alessandro (author), Maude, Duncan K. (author), Garcia-Hernandez, Mar (author), van der Zant, H.S.J. (author)Franckeite is a naturally occurring layered mineral with a structure composed of alternating stacks of SnS2-like and PbS-like layers. Although this superlattice is composed of a sequence of isotropic two-dimensional layers, it exhibits a spontaneous rippling that makes the material structurally anisotropic. We demonstrate that this rippling...journal article 2020
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Siskins, M. (author), Lee, M. (author), Wehenkel, D. (author), van Rijn, R. (author), de Jong, Tijmen W. (author), Renshof, Johannes R. (author), Hopman, Berend C. (author), Peters, Willemijn S.J.M. (author), Davidovikj, D. (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author)The high flexibility, impermeability and strength of graphene membranes are key properties that can enable the next generation of nanomechanical sensors. However, for capacitive pressure sensors, the sensitivity offered by a single suspended graphene membrane is too small to compete with commercial sensors. Here, we realize highly sensitive...journal article 2020