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Tuning dynamics and dissipation dilution in 2D material resonators by MEMS-induced tension

Wopereis, Michiel (author)

Nanomechanical resonators made of two-dimensional (2D) materials are the subject of intensive research due to their remarkable properties, allowing them to operate at high frequencies with high sensitivity. However, dissipation losses and manufacturing issues have prevented them from reaching their full potential. This thesis aims to overcome...

master thesis 2024

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Nonlinear coupling and dissipation in two-dimensional resonators

Keşkekler, A. (author)

Micro and nanomechanical resonators are essential to the state-of-the-art communication, data processing, timekeeping, and sensing systems. The discovery of graphene and other two-dimensional (2D) materials has been a profound source of inspiration for the next generation of these devices, owing to their exceptional mechanical, electrical, and...

doctoral thesis 2023

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Tuning graphene dynamics by mechanical strain

Bouman, Niels (author)

Two-dimensional (membrane) materials have been receiving much scientific attention due to their unique material properties that can be used to study the smallest physical phenomena. One such material is graphene, perceived as the holy grail in material physics, due to its unique material properties. Its aspect ratio diminishes the bending...

master thesis 2023

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Nanomechanical absorption spectroscopy of 2D materials with femtowatt sensitivity

Kirchhof, Jan N. (author), Yu, Yuefeng (author), Yagodkin, Denis (author), Stetzuhn, Nele (author), de Araújo, Daniel B. (author), Kanellopulos, Kostas (author), Mañas Valero, S. (author), Coronado, Eugenio (author), van der Zant, H.S.J. (author)

Nanomechanical spectroscopy (NMS) is a recently developed approach to determine optical absorption spectra of nanoscale materials via mechanical measurements. It is based on measuring changes in the resonance frequency of a membrane resonator vs. the photon energy of incoming light. This method is a direct measurement of absorption, which has...

journal article 2023

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Symmetry-Breaking-Induced Frequency Combs in Graphene Resonators

Keşkekler, A. (author), Arjmandi Tash, H. (author), Steeneken, P.G. (author), Alijani, F. (author)

Nonlinearities are inherent to the dynamics of two-dimensional materials. Phenomena-like intermodal coupling already arise at amplitudes of only a few nanometers, and a range of unexplored effects still awaits to be harnessed. Here, we demonstrate a route for generating mechanical frequency combs in graphene resonators undergoing symmetry...

journal article 2022

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Self-Sealing Complex Oxide Resonators

Lee, M. (author), Robin, M.P. (author), Guis, R.H. (author), Filippozzi, U. (author), Shin, D. (author), van Thiel, T.C. (author), Paardekooper, Stijn P. (author), Renshof, Johannes R. (author), van der Zant, H.S.J. (author), Caviglia, A. (author), Verbiest, G.J. (author), Steeneken, P.G. (author)

Although 2D materials hold great potential for next-generation pressure sensors, recent studies revealed that gases permeate along the membrane-surface interface, necessitating additional sealing procedures. In this work, we demonstrate the use of free-standing complex oxides as self-sealing membranes that allow the reference cavity beneath...

journal article 2022

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Higher-order phenomena in nanomechanics of two-dimensional material membranes

Siskins, M. (author)

This thesis studies higher-order material properties* and effects in van der Waals crystals, such as anisotropic Young’s modulus, magnetostriction, and non-trivial thermal expansion effects near magnetic and electronic phase transitions, that can affect the nanomechanical motion ofmultilayer two-dimensional (2D) material membranes. These...

doctoral thesis 2021

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Applied and fundamental studies of vibrating 2D membranes

Lee, M. (author)

This thesis encompasses both applied and fundamental studies of suspended van der Waals materials. Chapters 1 and 2 give an introduction to the field of 2D materials and some of the critical methods which facilitate the study of the suspended structures. In Chapters 3 and 4 we focus on the applications of graphene in barometric pressure sensors...

doctoral thesis 2021

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Dynamics of 2D material membranes

Steeneken, P.G. (author), Dolleman, R.J. (author), Davidovikj, D. (author), Alijani, F. (author), van der Zant, H.S.J. (author)

The dynamics of suspended two-dimensional (2D) materials has received increasing attention during the last decade, yielding new techniques to study and interpret the physics that governs the motion of atomically thin layers. This has led to insights into the role of thermodynamic and nonlinear effects as well as the mechanisms that govern...

review 2021

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Squeeze-Film Effect on Atomically Thin Resonators in the High-Pressure Limit

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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On resonances in a weakly nonlinear microbeam due to an electric actuation

Harjanto, Eric (author), van Horssen, W.T. (author), Tuwankotta, Johan M. (author)

In this paper, the oscillations of an actuated, simply supported microbeam are studied for which it is assumed that the electric load is composed of a small DC polarization voltage and a small, harmonic AC voltage. Bending stiffness and mid-plane stretching are taken into account as well as small viscous or structural damping. No tensile...

journal article 2021

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Tunable coupling of two mechanical resonators by a graphene membrane

Verbiest, G.J. (author), Goldsche, M. (author), Sonntag, J. (author), Khodkov, T. (author), von den Driesch, N. (author), Buca, D. (author), Stampfer, C. (author)

Coupled nanomechanical resonators are interesting for both fundamental studies and practical applications as they offer rich and tunable oscillation dynamics. At present, the mechanical coupling in such systems is often mediated by a fixed geometry, such as a joint clamping point of the resonators or a displacement-dependent force. Here we...

journal article 2021

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Self-folding using capillary forces

Kwok, Kam Sang (author), Huang, Qi (author), Mastrangeli, Massimo (author), Gracias, David (author)

Self-folding broadly refers to the assembly of 3D structures by bending, curving, and folding without the need for manual or mechanized intervention. Self-folding is scientifically interesting because examples of self-folded structures, from plant leaves to gut villi to cerebral gyri, abound in nature. From an engineering and technological...

review 2019

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Highly anisotropic mechanical and optical properties of 2D layered As₂S₃ membranes

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 As₂S₃ is an...

journal article 2019

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High-frequency stochastic switching of graphene resonators near room temperature

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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Dynamics of interacting graphene membranes

Dolleman, R.J. (author)

Micro and nanomechanical sensors are indispensable in modern consumer electronics, automotive and medical industries. Gas pressure sensors are currently the most widespread membrane-based micromechanical sensors. By reducing their size, their unit costs and energy consumption drops, making them more attractive for integration in new applications...

doctoral thesis 2018

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On Leveraging Vertical Proximity in 3D Memory Hierarchies

Lefter, M. (author)

Within the past half century, Integrated Circuits (ICs) experienced an aggressive, performance driven, technology feature size scaling. As the technology scaled into the deep nanometer range, physical and quantum mechanical effects that were previously irrelevant become influential, or even dominant, resulting in, e.g., not any longer negligible...

doctoral thesis 2018

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Two-dimensional membranes in motion

Davidovikj, D. (author)

This thesis revolves around nanomechanical membranes made of suspended two - dimensional materials. Chapters 1-3 give an introduction to the field of 2D-based nanomechanical devices together with an overview of the underlying physics and the measurementtools used in subsequent chapters. The research topics that are discussed can bedivided into...

doctoral thesis 2018

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On-chip heaters for tension tuning of graphene nanodrums

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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Graphene gas pumps

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