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球探体育学术发展论坛之报告一:单壁碳纳米管的结构控制生长方法

来源:球探体育比分老版本 发布者:金霞发布时间:2019-11-13浏览次数:199

报告题目:单壁碳纳米管的结构控制生长方法

报 告 人:张 锦(北京大学化学与分子工程学院、北京石墨烯研究院)

报告时间:20191123日(星期六)下午1:30

报告地点:新能源大楼多功能厅121

报告人简介:     

   张 锦,北京大学教授、博士生导师、杰出青年基金获得者、长江学者特聘教授、英国皇家化学学会会士、中组部万人计划科技创新领军人才、科技部重点研发计划项目首席科学家。主要从事纳米碳材料的控制制备及其拉曼光谱学研究,在Nature Nat. Mater.等刊物发表论文260余篇,获授权专利20余项。荣获国家自然科学奖二等奖(两项)、全国优秀博士学位论文指导教师、中国化学会青年化学奖、教育部新世纪优秀人才资助计划和北京大学“十佳”导师等奖励。

报告摘要:

As synthesis determined the future, in this talk, I will focus on the chirality controlled growth of horizontal carbon nanotubes array with designed catalysts: 1) By using open-end SWNTs as ‘seeds/catalysts’ (without metal catalysts), duplicate SWNTs could be grown and cloned from the parent segments via an open-end growth mechanism. These findings provide a new approach for growing SWNTs with controlled chirality; 2) Using symmetry matching strategy, a structure-family (2m, m) horizontally aligned SWNTs were successfully obtained on uniform carbide (WC and Mo2C) solid catalysts. It is based on a consideration of nanotube/catalyst interfacial thermodynamics determined by symmetry, and the kinetic growth rates set by the number of kinks; 3) For the application of SWNTs in electronic device, a new family of semiconducting SWNTs, (n, n-1) carbon nanotubes, called property-family, with different diameters can be grown using near-equilibrium nucleation growth mode. This new strategy adds a new degree of freedom for selective growth of SWNTs and opens up a new route for growth of SWNTs families beyond catalysts design.

References

1.Jin Zhang et. al., Nano Lett., 9(2009), 1673-1677.

2.Jin Zhang et. al., Nature, 543(2017), 234-238.

3.Jin Zhang et. al., Chem, 5(2019), 1182-1193.