Graphene mechanical oscillators with tunable frequency
Changyao Chen,Sunwoo Lee,Vikram Deshpande,Gwan Hyoung Lee,Gwan Hyoung Lee,Michael Lekas,Kenneth L. Shepard,James Hone +7 more
TLDR
Graphene voltage-controlled oscillators built on micrometre-size, atomically thin graphene nanomechanical resonators, whose frequencies can be electrostatically tuned by as much as 14% exhibit frequency stability and a modulation bandwidth sufficient for the modulation of radiofrequency carrier signals.Abstract:
Oscillators, which produce continuous periodic signals from direct current power, are central to modern communications systems, with versatile applications including timing references and frequency modulators. However, conventional oscillators typically consist of macroscopic mechanical resonators such as quartz crystals, which require excessive off-chip space. Here, we report oscillators built on micrometre-size, atomically thin graphene nanomechanical resonators, whose frequencies can be electrostatically tuned by as much as 14%. Self-sustaining mechanical motion is generated and transduced at room temperature in these oscillators using simple electrical circuitry. The prototype graphene voltage-controlled oscillators exhibit frequency stability and a modulation bandwidth sufficient for the modulation of radiofrequency carrier signals. As a demonstration, we use a graphene oscillator as the active element for frequency-modulated signal generation and achieve efficient audio signal transmission.read more
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Novel effects of strains in graphene and other two dimensional materials
B. Amorim,B. Amorim,Alberto Cortijo,F. de Juan,F. de Juan,Adolfo G. Grushin,Francisco Guinea,Francisco Guinea,Francisco Guinea,A. Gutierrez-Rubio,Hector Ochoa,Hector Ochoa,Vincenzo Parente,Vincenzo Parente,Rafael Roldán,Pablo San-Jose,Jürgen Schiefele,Mauricio Sturla,María A. H. Vozmediano +18 more
TL;DR: In this paper, the role of strains in the structural and electronic properties of graphene and other two-dimensional compounds is discussed. But, the influence of strains on these properties was not considered before, such as electronic transport, spin-orbit coupling, the formation of Moire patterns and optics.
Journal ArticleDOI
Optomechanical coupling between a multilayer graphene mechanical resonator and a superconducting microwave cavity
Vibhor Singh,Sal J. Bosman,B. H. Schneider,Ya. M. Blanter,Andres Castellanos-Gomez,Gary A. Steele +5 more
TL;DR: Coupling between a multilayer graphene resonator with quality factors up to 220,000 and a high-Q superconducting cavity is demonstrated and the cooperativity C, a characterization of coupling strength, is quantitatively extracted from the measurement with no free parameters and found, which is promising for the quantum regime of graphene motion.
Journal ArticleDOI
Novel effects of strains in graphene and other two dimensional materials
B. Amorim,B. Amorim,Alberto Cortijo,F. de Juan,F. de Juan,Adolfo G. Grushin,Francisco Guinea,Francisco Guinea,Francisco Guinea,A. Gutierrez-Rubio,Hector Ochoa,Hector Ochoa,Vincenzo Parente,Vincenzo Parente,Rafael Roldán,Pablo San-Jose,Jürgen Schiefele,Mauricio Sturla,María A. H. Vozmediano +18 more
TL;DR: In this paper, the role of strains in the structural and electronic properties of graphene and other two-dimensional compounds is discussed. But the role is not restricted to graphene, and they are being intensively studied in other two dimensional materials, such as the metallic dichalcogenides.
Journal ArticleDOI
Highly Flexible and Conductive Printed Graphene for Wireless Wearable Communications Applications
Xianjun Huang,Ting Leng,Mengjian Zhu,Xiao Zhang,JiaCing Chen,KuoHsin Chang,Mohammed Aqeeli,Andre K. Geim,Kostya S. Novoselov,Zhirun Hu +9 more
TL;DR: High conductive, highly flexible, light weight and low cost printed graphene for wireless wearable communications applications and can be processed at low temperature so that it is compatible with heat-sensitive flexible materials like papers and textiles.
Journal ArticleDOI
Experimental realization of on-chip topological nanoelectromechanical metamaterials
TL;DR: In this article, the experimental realization of topological nanoelectromechanical metamaterials, consisting of two-dimensional arrays of free-standing silicon nitride nanomembranes that operate at high frequencies (10-20 megahertz), was reported.
References
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The rise of graphene
TL;DR: Owing to its unusual electronic spectrum, graphene has led to the emergence of a new paradigm of 'relativistic' condensed-matter physics, where quantum relativistic phenomena can now be mimicked and tested in table-top experiments.
Journal ArticleDOI
Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene
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Large-Area Synthesis of High-Quality and Uniform Graphene Films on Copper Foils
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Roll-to-roll production of 30-inch graphene films for transparent electrodes
Sukang Bae,Hyeongkeun Kim,Youngbin Lee,Xiangfan Xu,Jaesung Park,Yi Zheng,Jayakumar Balakrishnan,Tian Lei,Hye Ri Kim,Young Il Song,Young Jin Kim,Kwang S. Kim,Barbaros Özyilmaz,Jong Hyun Ahn,Byung Hee Hong,Sumio Iijima,Sumio Iijima +16 more
TL;DR: The roll-to-roll production and wet-chemical doping of predominantly monolayer 30-inch graphene films grown by chemical vapour deposition onto flexible copper substrates are reported, showing high quality and sheet resistances superior to commercial transparent electrodes such as indium tin oxides.