Article
Chemistry, Multidisciplinary
Chunhui Dai, Yoonsoo Rho, Khanh Pham, Brady McCormick, Brian W. Blankenship, Wenyu Zhao, Zuocheng Zhang, Michael F. Crommie, Feng Wang, Costas P. Grigoropoulos, Alex Zettl
Summary: The low mass density and high mechanical strength of graphene make it an attractive material for suspended-membrane energy transducers. In this study, kirigami engineering was used to modify suspended pure-graphene membranes, resulting in a reduction in resonance frequency, an increase in displacement amplitude, and broadening of the transducer's effective bandwidth. This research presents a promising approach for miniaturized wide-band energy transducers with improved operational parameters and efficiency.
Article
Chemistry, Multidisciplinary
Chunhui Dai, Yoonsoo Rho, Khanh Pham, Brady McCormick, Brian W. Blankenship, Wenyu Zhao, Zuocheng Zhang, S. Matt Gilbert, Michael F. Crommie, Feng Wang, Costas P. Grigoropoulos, Alex Zettl
Summary: The low mass density and high mechanical strength of graphene make it an attractive material for suspended-membrane energy transducers. By employing kirigami engineering, the resonance frequency is reduced, the displacement amplitude is increased, and the effective bandwidth of the transducer is broadened.
Letter
Materials Science, Multidisciplinary
Mrityunjay Kothari, Kyung-Suk Kim
Summary: The combination of flexoelectricity in multi-layer graphene and elasticity of the substrate can produce periodic crinkles, explaining the grade-dependent mosaic spreading in highly oriented pyrolytic graphite.
MRS COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Ata Keskekler, Hadi Arjmandi-Tash, Peter G. Steeneken, Farbod Alijani
Summary: Nonlinearities and symmetry breaking in two-dimensional material resonators can lead to the emergence of mechanical frequency combs and chaotic dynamics near internal resonances.
Article
Chemistry, Analytical
Brittany Carter, Uriel F. Hernandez, David J. Miller, Andrew Blaikie, Viva R. Horowitz, Benjamin J. Aleman
Summary: This study demonstrates a scalable platform of suspended graphene resonators, showing persistent mechanical coupling between neighboring resonators and evidence of inter-resonator coupling of higher-order modes. This establishes the platform as a viable option for realizing large-scale programmable networks and enabling various applications.
Article
Chemistry, Multidisciplinary
Manoharan Muruganathan, Ngoc Huynh Van, Marek E. Schmidt, Hiroshi Mizuta
Summary: Nanoelectromechanical (NEM) switches hold great potential to overcome the limitations of current CMOS switches. This study successfully tackles the major challenges of NEM switches by utilizing weak van der Waals bonding in graphene-hexagonal boron nitride (hBN) contacts, resulting in low voltage, high endurance, and excellent performance.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Analytical
Yevhen Yashchyshyn, Pawel Bajurko, Jakub Sobolewski, Pavlo Sai, Aleksandra Przewloka, Aleksandra Krajewska, Pawel Prystawko, Maksym Dub, Wojciech Knap, Sergey Rumyantsev, Grzegorz Cywinski
Summary: The RF switches using a combination of graphene and 2DEG in the AlGaN/GaN system show good on-state insertion losses and fast switching times in the frequency range from 10 MHz to 114.5 GHz, providing up to 20 MHz bandwidth for time-modulated systems.
Article
Engineering, Electrical & Electronic
Rekha Chaudhary, Prasantha R. Mudimela
Summary: The research focuses on the performance analysis of graphene and graphene derivative-based NEMS switch, observing that reducing elastic modulus has a significant impact on pull-in voltage, and composite beams concept plays a positive role in reducing both elastic modulus and pull-in voltage.
IEEE TRANSACTIONS ON NANOTECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Johannes Binder, Jakub Rogoza, Leonid Tkachenko, Iwona Pasternak, Jakub Sitek, Wlodek Strupinski, Mariusz Zdrojek, Jacek M. Baranowski, Roman Stepniewski, Andrzej Wysmolek
Summary: The study introduces a direct writing method for graphene grown on germanium, allowing for suspended layers without the need for transferring graphene. Utilizing laser-induced photoelectrochemical etching, selective dissolution of germanium while preserving the graphene layer intact is achieved. In-situ Raman spectroscopy measurements demonstrate a significant increase in graphene-related Raman bands as the graphene layer separates from the substrate, suggesting that the weak Raman signal for graphene on germanium is not intrinsic but caused by substrate interaction.
Article
Chemistry, Multidisciplinary
Liga Jasulaneca, Alexander I. Livshits, Raimonds Meija, Jelena Kosmaca, Raitis Sondors, Matiss M. Ramma, Daniels Jevdokimovs, Juris Prikulis, Donats Erts
Summary: Electrostatically actuated nanoelectromechanical (NEM) switches show promise for sharply defined ON/OFF states, high ON/OFF current ratio, low power consumption, and compact design. The challenge lies in fabricating single nanowire-based NEM switches. This study demonstrates the application of CuO nanowires as active elements in NEM switches and validates theoretical modeling for scalable integration of bottom-up synthesized nanowires in NEMS.
Article
Chemistry, Multidisciplinary
Robin J. Dolleman, Debadi Chakraborty, Daniel R. Ladiges, Herre S. J. van der Zant, John E. Sader, Peter G. Steeneken
Summary: The resonance frequency of membranes is influenced by gas pressure, mainly due to the squeeze-film effect, especially evident in low-mass graphene membranes. Research found that the resonance frequency of single-layer graphene resonators is lower than expected from ideal compression models, leading to the proposal of an improved model incorporating gas leakage effects. This study contributes to a better understanding of the squeeze-film effect and offers insights for optimizing squeeze-film pressure sensors made from 2D materials.
Article
Chemistry, Physical
Cristina Ramirez, Ali Saffar Shamshirgar, Domingo Perez-Coll, Maria Isabel Osendi, Pilar Miranzo, Girish C. Tewari, Maarit Karppinen, Irina Hussainova, Manuel Belmonte
Summary: 3D printing technologies combined with chemical vapor deposition can be used to fabricate new hybrid materials with tunable properties. The thickness and crystallinity of graphene-based coatings can be controlled by altering the parameters of chemical vapor deposition. Transmission electron microscopy confirms the successful growth of nanocrystalline graphene layers on 3D printed α-Al2O3 substrates, resulting in fully-connected and highly conductive pathways. In terms of thermal conductivity, specimens decorated with graphitic coatings exhibit higher thermal conductivity compared to bare ceramic scaffolds.
Article
Materials Science, Multidisciplinary
Liga Jasulaneca, Raimonds Meija, Edijs Kauranens, Raitis Sondors, Jana Andzane, Roberts Rimsa, Gatis Mozolevskis, Donats Erts
Summary: The study demonstrates that using Bi2Se3 nanoribbons as active elements can meet the flexibility and conductivity requirements for NEM switches in cryogenic applications. Experimental proof shows that reversible switching of NEM switches can be achieved at temperatures as low as 5K, with distinct ON and OFF states, opening up new avenues for research and development of NEM systems at cryogenic temperatures.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Kishan Thodkar, Fabian Gramm
Summary: The high field-effect mobility and two-dimensional nature of graphene films make it a promising material for developing sensitive sensors with low power consumption. The chemical vapor deposition process allows scalable production of high-quality graphene films. This study presents a simplified fabrication process to develop suspended chemical vapor deposition graphene devices with enhanced field-effect mobility operating at room temperature.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Analytical
Joon Hyong Cho, David Cayll, Dipankar Behera, Michael Cullinan
Summary: The demand for graphene-based devices is rapidly growing, but there are significant challenges in the manufacturing process. Despite recent breakthroughs in basic research, integrating graphene with Micro-Nano Electromechanical Systems remains challenging. Therefore, achieving large-scale, repeatable production is still a major barrier to the commercialization of graphene.
Article
Chemistry, Multidisciplinary
Pankaj Sharma, Laurent Syavoch Bernard, Antonios Bazigos, Arnaud Magrez, Adrian M. Ionescu
Article
Engineering, Electrical & Electronic
Pankaj Sharma, Laurent Syavoch Bernard, Antonios Bazigos, Arnaud Magrez, Adrian Mihai Ionescu
IEEE ELECTRON DEVICE LETTERS
(2015)
Article
Chemistry, Multidisciplinary
Clara F. Moldovan, Wolfgang A. Vitale, Pankaj Sharma, Michele Tamagnone, Juan R. Mosig, Adrian M. Ionescu
Article
Engineering, Electrical & Electronic
Christian Schulte-Braucks, Rahul Pandey, Redwan Noor Sajjad, Mike Barth, Ram Krishna Ghosh, Ben Grisafe, Pankaj Sharma, Nils von den Driesch, Anurag Vohra, Gilbert Bruce Rayner, Roger Loo, Siegfried Mantl, Dan Buca, Chih-Chieh Yeh, Cheng-Hsien Wu, Wilman Tsai, Dimitri A. Antoniadis, Suman Datta
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2017)
Article
Engineering, Electrical & Electronic
Pankaj Sharma, Jianchi Zhang, Kai Ni, Suman Datta
IEEE ELECTRON DEVICE LETTERS
(2018)
Article
Engineering, Electrical & Electronic
Kai Ni, Pankaj Sharma, Jianchi Zhang, Matthew Jerry, Jeffery A. Smith, Kandabara Tapily, Robert Clark, Souvik Mahapatra, Suman Datta
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2018)
Article
Engineering, Electrical & Electronic
Pankaj Sharma, Julien Perruisseau-Carrier, Clara Moldovan, Adrian Mihai Ionescu
IEEE TRANSACTIONS ON NANOTECHNOLOGY
(2014)
Article
Physics, Applied
J. S. Gomez-Diaz, J. Perruisseau-Carrier, P. Sharma, A. Ionescu
JOURNAL OF APPLIED PHYSICS
(2012)
Proceedings Paper
Engineering, Electrical & Electronic
Pankaj Sharma, Laurent Syavoch Bernard, Antonios Bazigos, Arnaud Magrez, Laszlo Forro, Adrian M. Ionescu
2016 46TH EUROPEAN SOLID-STATE DEVICE RESEARCH CONFERENCE (ESSDERC)
(2016)
Proceedings Paper
Engineering, Electrical & Electronic
P. Sharma, L. S. Bernard, A. Bazigos, A. Magrez, A. M. Ionescu
2015 73RD ANNUAL DEVICE RESEARCH CONFERENCE (DRC)
(2015)
Proceedings Paper
Engineering, Electrical & Electronic
Pankaj Sharma, Julien Perruisseau Carrier, Adrian M. Ionescu
2013 14TH INTERNATIONAL CONFERENCE ON ULTIMATE INTEGRATION ON SILICON (ULIS)
(2013)
Proceedings Paper
Engineering, Electrical & Electronic
Pankaj Sharma, J. S. Gomez-Diaz, Adrian M. Ionescu, J. Perruisseau-Carrier
2012 12TH IEEE CONFERENCE ON NANOTECHNOLOGY (IEEE-NANO)
(2012)
Article
Engineering, Electrical & Electronic
Bruno Galizia, Patrick Fiorenza, Corrado Bongiorno, Bela Pecz, Zsolt Fogarassy, Emanuela Schiliro, Filippo Giannazzo, Fabrizio Roccaforte, Raffaella Lo Nigro
Summary: This study demonstrates the growth of oriented AlN thin films on 4H-SiC substrates using PE-ALD technique, and investigates the impact of NH3 plasma pulsing on the microstructure and orientation degree of the AlN layers. The structural characterization reveals different polymorphic structures depending on the NH3 plasma pulsing time, and electrical nanoscopic characterization shows a correlation between the AlN crystalline phases and the insulating properties.
MICROELECTRONIC ENGINEERING
(2024)
Article
Engineering, Electrical & Electronic
Theo Levert, Alter Zakhtser, Julien Duval, Chloe Raguenez, Stephane Verdier, Delphine Le Cunff, Jean-Herve Tortai, Bernard Pelissier
Summary: In this study, the robustness of optical constants and optical band gap determination of three different materials is compared using a combination of spectroscopic ellipsometry and energy loss signal of X-ray photoelectron spectroscopy. The hybridization of these two techniques provides a new robust method for determining the band gap of the studied materials and other optical properties over a wide energy range.
MICROELECTRONIC ENGINEERING
(2024)
