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Yang, X. (author), Shin, D. (author), Yu, Z. (author), Watanabe, Kenji (author), Taniguchi, Takashi (author), Babenko, Vitaliy (author), Hofmann, Stephan (author), Caneva, S. (author)Fluorescence imaging is an invaluable tool to investigate biomolecular dynamics, mechanics, and interactions in aqueous environments. Two-dimensional materials offer large-area, atomically smooth surfaces for wide-field biomolecule imaging. Despite the success of graphene for on-chip biosensing and biomolecule manipulation, its strong...journal article 2024
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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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Zhang, Heng (author), Debroye, Elke (author), Fu, Shuai (author), González, Miriam C.Rodriguez (author), du Fossé, I. (author), Geuchies, Jaco J. (author), Gao, Lei (author), Yu, Xiaoqing (author), Houtepen, A.J. (author)Synergically combining their respective ultrahigh charge mobility and strong light absorption, graphene (Gr)/semiconductor heterostructures are promising building blocks for efficient optoelectronics, particularly photodetectors. Charge transfer (CT) across the heterostructure interface crucially determines device efficiency and functionality...journal article 2023
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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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Gao, Yixun (author), Wang, Jianqiang (author), Feng, Yancong (author), Cao, Nengjie (author), Li, Hao (author), de Rooij, Nicolaas Frans (author), Umar, Ahmad (author), French, P.J. (author), Wang, Yao (author), Zhou, Guofu (author)It is a great challenge to develop efficient room-temperature sensing materials and sensors for nitric oxide (NO) gas, which is a biomarker molecule used in the monitoring of inflammatory respiratory diseases. Herein, Hemin (Fe (III)-protoporphyrin IX) is introduced into the nitrogen-doped reduced graphene oxide (N-rGO) to obtain a novel...journal article 2022
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Wang, Jianqiang (author), Gao, Yixun (author), Chen, Fengjia (author), Zhang, Lulu (author), Li, Hao (author), De Rooij, Nicolaas Frans (author), Umar, Ahmad (author), Lee, Yi Kuen (author), French, P.J. (author)Implementing parts per billion-level nitric oxide (NO) sensing at room temperature (RT) is still in extreme demand for monitoring inflammatory respiratory diseases. Herein, we have prepared a kind of core-shell structural Hemin-based nanospheres (Abbr.: Hemin-nanospheres, defined as HNSs) with the core of amorphous Hemin and the shell of...journal article 2022
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Seo, Miri (author), Yang, Eunseo (author), Shin, D. (author), Je, Yugyeong (author), Joo, C. (author), Lee, Kookjin (author), Lee, Sang Wook (author)Nanomechanical resonator devices are widely used as ultrasensitive mass detectors for fundamental studies and practical applications. The resonance frequency of the resonators shifts when a mass is loaded, which is used to estimate the mass. However, the shift signal is often blurred by the thermal noise, which interferes with accurate mass...journal article 2022
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Pezone, R. (author), Baglioni, G. (author), Sarro, Pasqualina M (author), Steeneken, P.G. (author), Vollebregt, S. (author)During the past decades micro-electromechanical microphones have largely taken over the market for portable devices, being produced in volumes of billions yearly. Because performance of current devices is near the physical limits, further miniaturization and improvement of microphones for mobile devices poses a major challenge that requires...journal article 2022
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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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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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Palmar, Merlin (author)Neuroscientists use neural electrodes to explore the working mechanisms of the nervous system. Therefore, ideal electrodes should have a small size and the ability to record and stimulate at a single cell resolution with low noise. Materials used for fabrication should be flexible and stable for a long period in the biological media. However,...master thesis 2021
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Yang, W.W.W. (author)We start this thesis by exploring the question whether there is more to be done with solid-state nanopores, given the success of nanopores for DNA sequencing applications.doctoral thesis 2021
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Wang, H. (author), Cucu Laurenciu, N. (author), Jiang, Y. (author), Cotofana, S.D. (author)Design and implementation of artificial neuromorphic systems able to provide brain akin computation and/or bio-compatible interfacing ability are crucial for understanding the human brain's complex functionality and unleashing brain-inspired computation's full potential. To this end, the realization of energy-efficient, low-area, and bio...journal article 2021
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Dumitru, Florin-Silviu (author), Cucu Laurenciu, N. (author), Matei, Alexandru (author), Enachescu, Marius (author)McCulloch-Pitts neuron structures are comprised of a number of synaptic inputs and a decision element, called soma. In this paper, we propose a 5-bit Graphene Nanoribbon (GNR)-based DAC to fulfill the role of the summation element featuring programmable input weights. The proposed GNR-based 5-bit DAC relies on: (i) GNR unit current cells and ...journal article 2021
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Wang, H. (author), Cucu Laurenciu, N. (author), Cotofana, S.D. (author)In the paper we propose a reconfigurable graphene-based Spiking Neural Network (SNN) architecture and a training methodology for initial synaptic weight values determination. The proposed graphene-based platform is flexible, comprising a programmable synaptic array which can be configured for different initial synaptic weights and plasticity...journal article 2021
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Ghani, Siti Nur Ainsyah (author), Yarmand, H. (author), Noor, Noor Fadiya Mohd (author)Heat flux enhancement due to utilization of graphene, graphene nanoplatelets, and graphene oxides in water/ethylene-glycol based nanofluids over an inclined permeable cylinder is focused in the present study. The governing PDE are reformulated into non-linear ODE by applying similarity expressions. A shooting procedure is opted to reformulate...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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Ricciardella, F. (author), Nigro, Maria Arcangela (author), Miscioscia, Riccardo (author), Miglietta, Maria Lucia (author), Polichetti, Tiziana (author)In this study, we investigate a Schottky junction based on solution-processed multilayered graphene (MLG). We present a rectifying device obtained with a straightforward approach, that is drop-casting a few microliters of MLG solution simultaneously onto Si, Si-SiO2 and Si-SiO2-Cr/Au surface. Monitoring the modulation of Schottky barrier...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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Yang, W.W.W. (author), Radha, Boya (author), Choudhary, Adnan (author), You, Yi (author), Mettela, Gangaiah (author), Geim, Andre K. (author), Aksimentiev, Aleksei (author), Keerthi, Ashok (author), Dekker, C. (author)2D nanoslit devices, where two crystals with atomically flat surfaces are separated by only a few nanometers, have attracted considerable attention because their tunable control over the confinement allows for the discovery of unusual transport behavior of gas, water, and ions. Here, the passage of double-stranded DNA molecules is studied...journal article 2021