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首页> 外文期刊>Nano letters >Giant, Voltage Tuned, Quality Factors of Single Wall Carbon Nanotubes and Graphene at Room Temperature
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Giant, Voltage Tuned, Quality Factors of Single Wall Carbon Nanotubes and Graphene at Room Temperature

机译：室温下单壁碳纳米管和石墨烯的巨型，电压调谐，质量因素

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摘要

Mastering dissipation in graphene-based nanostructures is still the major challenge in most fundamental and technological exploitations of these ultimate mechanical nanoresonators. Although high quality factors have been measured for carbon nanotubes (>10(6)) and graphene (>10(5)) at cryogenic temperatures, room-temperature values are orders of magnitude lower (similar or equal to 10(2)). We present here a controlled quality factor increase of up to x10(3) for these basic carbon nanostructures when externally stressed like a guitar string. Quantitative agreement is found with theory attributing this decrease in dissipation to the decrease in viscoelastic losses inside the material, an effect enhanced by tunable "soft clamping". Quality factors exceeding 25 000 for SWCNTs and 5000 for graphene were obtained on several samples, reaching the limits of the graphene material itself. The combination of ultralow size and mass with high quality factors opens new perspectives for atomically localized force sensing and quantum computing as the coherence time exceeds state-of-the-art cryogenic devices.
机译：在石墨烯纳米结构的掌握散热仍是这些最终力学nanoresonators的最根本和技术剥削的主要挑战。虽然高品质因子已经被用于碳纳米管测量（> 10（6））和石墨烯（> 10（5））在低温下，室温值数量级较低（类似于或等于10（2））。在这里，我们目前为止X10（3）这些基本的碳纳米结构的控制品质因数增加时，外部强调像吉他弦。定量协议发现理论归因于耗散这种下降在材料，通过可调的“软性钳位”增强效果里面粘弹性损失的减少。在几个样品获得超过25 000的SWCNT 5000和石墨烯的品质因子，在到达石墨烯材料本身的限制。超低尺寸和质量具有高品质因素的结合打开用于原子地本地化的力感测和量子计算作为相干时间的新观点超过国家的最先进的低温设备。

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  • 来源
    《Nano letters》 |2019年第3期|共5页
  • 作者

    Descombin A.; Poncharal P.; Pascale-Hamri A.; Choueib M.; Diehl R.; Vincent P.; Purcell S. T.; Ayari A.; Perisanu S.;

  • 作者单位

    Univ Claude Bernard Lyon 1 Univ Lyon CNRS Inst Lumiere Matiere F-69622 Villeurbanne France;

    Univ Claude Bernard Lyon 1 Univ Lyon CNRS Inst Lumiere Matiere F-69622 Villeurbanne France;

    Univ Claude Bernard Lyon 1 Univ Lyon CNRS Inst Lumiere Matiere F-69622 Villeurbanne France;

    Univ Claude Bernard Lyon 1 Univ Lyon CNRS Inst Lumiere Matiere F-69622 Villeurbanne France;

    Univ Claude Bernard Lyon 1 Univ Lyon CNRS Inst Lumiere Matiere F-69622 Villeurbanne France;

    Univ Claude Bernard Lyon 1 Univ Lyon CNRS Inst Lumiere Matiere F-69622 Villeurbanne France;

    Univ Claude Bernard Lyon 1 Univ Lyon CNRS Inst Lumiere Matiere F-69622 Villeurbanne France;

    Univ Claude Bernard Lyon 1 Univ Lyon CNRS Inst Lumiere Matiere F-69622 Villeurbanne France;

    Univ Claude Bernard Lyon 1 Univ Lyon CNRS Inst Lumiere Matiere F-69622 Villeurbanne France;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;物理化学（理论化学）、化学物理学;
  • 关键词

    NEMS; carbon nanotube; graphene; Q-factor; nanomechanics;

    机译：NEMS;碳纳米管;石墨烯;Q系子;纳米力学;

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