NOVEL TWO-DIMENSIONAL MATERIALS CAPTURED IN SPACE AND TIME

时空捕捉的新颖二维材料

• 批准号: RGPIN-2015-06133
• 负责人: Yurtsever, Aycan
• 金额: $ 2.4万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=669500
• 关键词: NOVEL; TWO; DIMENSIONAL; MATERIALS; CAPTURED

Two-dimensional (2D) layered materials have attracted much attention due to their unusual structural, electronic, photonic and thermal properties. Quite possible the best known example of such a material is graphene which is made of single atomic layer of carbon. The discovery of this specific material has opened up the possibility of growing and exploring other families of layered materials. In fact, graphene might be just the tip of an iceberg as 2D materials in the nitrides, dichalcogenides and oxides families began to emerge.****The overall research goal of this Discovery Project is to explore low-dimensional materials and create new knowledge that is fundamental for our ability to predict, control and design functional properties out of these newly emerging material systems. In particular, it will investigate the thermal and phononic properties of graphene, search for ultrafast metallic-semiconducting switching behavior in molybdenum disulfide, and explore the energy transfer phenomena.****For this purpose a fundamentally new experimental paradigm, the ultrafast transmission electron microscopy (UTEM) that is unique in Canada, will be used. In this methodology, the material system is excited with an ultrafast photon pulse and the ensuing dynamics is captured with ultrashort electron bunches, revealing the inner clockwork of the microscopic world. Unlike other approaches, UTEM provides the ability to selectively probe local sites at the nanoscale. Dr. Yurtsever has contributed greatly to the realization of this technology and he will apply this expertise to low-dimensional materials in this proposal.****Although the proposed research aims to answer fundamental questions pertaining to 2D materials, it has potential for an impact on the Canadian technological output with far-reaching consequences. To give a few examples, energy transfer between nanostructures, interfaces and nano-contacts are the basis of energy conversion devices. Through experiments such as those proposed in this project, the realization of efficient waste-heat recovery devices and photovoltaics will be possible. Furthermore, the ultrafast plane gliding in molybdenum disulfide, and the resulting electronic-property transition, will pave the way for the next-generation, non-volatile memory chips and electronic components that can operate at the terahertz frequencies.****In addition to significant contributions to the related fields, this project also offers unique opportunities to train highly qualified personnel. These contributions will strengthen the Canada's position in 2D materials, ultrafast imaging technologies and other related industries. Consequently, the project is well aligned with the specific goals of NSERC to advance knowledge in the physical sciences and to provide a platform for intellectual property, thus underpinning future development of commercial ventures within Canada.**

由于其异常的结构，电子，光子和热性能，二维（2D）分层材料引起了很多关注。这种材料最有可能的例子是石墨烯，它是由碳的单个原子层制成的。这种特定材料的发现开辟了种植和探索其他分层材料家族的可能性。实际上，石墨烯可能只是冰山一角，因为氮化物，二甲哥代基和氧化物家族的2D材料开始出现。特别是，它将研究石墨烯的热和语音性能，在二硫化钼中寻找超快金属 - 症状的开关行为，并探索能量传递现象。在这种方法中，材料系统用超快的光子脉冲激发，随后的动力学被超短电子束捕获，揭示了微观世界的内部发条。与其他方法不同，UTEM具有选择性探测纳米级本地站点的能力。 Yurtsever博士为实现这项技术做出了巨大贡献，他将在该提案中将这种专业知识应用于低维材料。为了举一些例子，纳米结构，界面和纳米接触之间的能量转移是能量转换装置的基础。通过该项目中提出的诸如实验，可以实现有效的废水恢复装置和光伏的实现。此外，超快的平面在钼中滑行以及由此产生的电子质地过渡，将为下一代，非挥发性存储芯片和电子组件铺平道路，这些芯片和电子组件可以在Terahertz频率上运作。这些贡献将加强加拿大在2D材料，超快成像技术和其他相关行业中的地位。因此，该项目与NSERC的具体目标保持一致，以提高物理科学的知识并为知识产权提供平台，从而为加拿大境内的商业企业的未来发展提供了基础。