EAGER: From Mechanics of the Eshelby Twist to Nanotube Chirality

EAGER:从埃谢尔比扭曲力学到纳米管手性

基本信息

  • 批准号:
    0951145
  • 负责人:
  • 金额:
    $ 15万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2009
  • 资助国家:
    美国
  • 起止时间:
    2009-08-15 至 2015-07-31
  • 项目状态:
    已结题

项目摘要

The objective of this research project award is to rapidly build on the overarching concept, a dislocation mechanics in one-dimensional structures of different geometries and topologies: nanotubes, nano-wires, and their archetypal building material?graphene. The specific types of dislocations include the edge and the screw dislocation lines with distinctly different roles. While the edge dislocation dynamics is greatly responsible for the inelastic mechanical response, strength and plastic yield (either in nanotubes, or wires, or graphene), the screw dislocations play central role in the formation mechanisms of nanowires and?as recently discovered?even nanotubes. The energy analysis will be performed on the range of structures in order to understand how the distribution of chiral types varies with the topology of the objects. Notably, only one chiral type normally occurs for the wires, while a broad range is systematically produced among the nanotubes. We will further expand this study to biologically important microtubules, which have analogous mechanical constitution, while the building blocks are of different scale and nature (tubulin dimers). Deliverables will include the quantified classification of tubular structures of different scales and different chiral symmetries, models of their elastic and inelastic mechanics, including validation through comparison with experiments, student education, documentation and dissemination of research results. If successful, this project will lead to deeper and cross-disciplinary understanding of topological makeup of a class of material structures, important and diverse as for electronics, strong materials, cytoskeleton dynamics. The results will be disseminated through publications, professional conferences, and presentations to students to potentially enable making new devices and enabling new technologies outside the academia. Students will benefit from the direct involvement in research as well as through classroom instruction, exposing them to the cutting-edge technological developments. This will have a long-lasting impact as they embark in their future careers.
该研究项目奖的目标是迅速建立在最重要的概念上,即在不同几何和拓扑的一维结构中的位错机制:纳米管、纳米线及其原型建筑材料?石墨烯。位错的具体类型包括刃型位错线和螺型位错线,它们具有明显不同的作用。虽然刃位错动力学对非弹性力学响应、强度和塑性屈服(无论是在纳米管、线或石墨烯中)有很大的影响,但螺旋位错在纳米线甚至最近发现的纳米管的形成机制中起着核心作用。能量分析将对结构的范围进行,以了解手性类型的分布如何随对象的拓扑而变化。值得注意的是,通常只有一种手性类型出现在导线上,而在纳米管中系统地产生了广泛的范围。我们将进一步将这项研究扩展到具有生物重要性的微管,它们具有相似的机械结构,而构建块具有不同的规模和性质(微管蛋白二聚体)。交付成果将包括不同比例和不同手性对称性的管状结构的量化分类、其弹性和非弹性力学模型,包括通过与实验比较、学生教育、文件编制和传播研究结果进行验证。如果成功,这个项目将导致对一类材料结构的拓扑结构的更深层次和跨学科的理解,这些结构对于电子、强材料、细胞骨架动力学来说是重要的和多样化的。这些成果将通过出版物、专业会议和向学生发表演讲来传播,从而有可能在学术界以外制造新设备和实现新技术。学生将受益于直接参与研究以及通过课堂教学,使他们接触到尖端技术发展。随着他们开始未来的职业生涯,这将产生长期的影响。

项目成果

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Boris Yakobson其他文献

Effects of 3d transition-metal doping on electronic and magnetic properties of MoS2 nanoribbons
3d过渡金属掺杂对MoS2纳米带电子和磁性能的影响
Seasonal variation in bait uptake and seropositivity during a multi-year biannual oral rabies fox vaccination programme in Kosovo (2010–2015)
  • DOI:
    10.1016/j.prevetmed.2020.105050
  • 发表时间:
    2020-08-01
  • 期刊:
  • 影响因子:
  • 作者:
    Nick Taylor;Izedin Goga;Valdet Gjinovci;Jeton Muhaxhiri;Ilir Recica;Beqe Hulaj;Boris Yakobson;Tony Wilsmore
  • 通讯作者:
    Tony Wilsmore
Evaluation of colony losses in Israel in relation to the incidence of pathogens and pests
  • DOI:
    10.1051/apido/2010047
  • 发表时间:
    2011-05-19
  • 期刊:
  • 影响因子:
    2.200
  • 作者:
    Victoria Soroker;Amots Hetzroni;Boris Yakobson;Dan David;Alina David;Hilary Voet;Yossi Slabezki;Haim Efrat;Shlomit Levski;Yossi Kamer;Etta Klinberg;Naama Zioni;Shani Inbar;Nor Chejanovsky
  • 通讯作者:
    Nor Chejanovsky

Boris Yakobson的其他文献

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{{ truncateString('Boris Yakobson', 18)}}的其他基金

Catalyst design for (n,m)-targeted carbon nanotube syntheses
(n,m)靶向碳纳米管合成的催化剂设计
  • 批准号:
    1605848
  • 财政年份:
    2016
  • 资助金额:
    $ 15万
  • 项目类别:
    Standard Grant
Multiscale modeling approach to catalytic growth of carbon nanotubes
碳纳米管催化生长的多尺度建模方法
  • 批准号:
    0731246
  • 财政年份:
    2007
  • 资助金额:
    $ 15万
  • 项目类别:
    Standard Grant

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