报告题目：石墨烯等离激元及其增强红外光谱研究

主讲嘉宾：杨晓霞 国家纳米科学中心特聘研究员

邀请人：张晗 教授

时间：2019年12月14日下午3：00

地点：沧海校区致腾楼223会议室

报告摘要：

This talk will present our recent research on graphene plasmon enhanced IR spectroscopy. IR spectroscopy plays an important role for rapid and noninvasive material identification through probing molecular vibrations, however, it cannot detect trace materials due to extremely small cross section of the IR light-molecule interactions. By achieving high-quality graphene plasmon covering the entire molecular fingerprint region, we identified molecules at the nanoscale level. This structure has graphene plasmonic structure on CaF₂ nanofilm to avoid the substrate phonon hybridization but maintain the electrical tunability, which was previously unattainable. Moreover, by taking the advantage of large electromagnetic field enhancement as well as the high gas adsorption at the graphene nanoribbon edges, we demonstrated label-free identification of gas molecules and monitoring of gaseous chemical reactions. The graphene plasmon performance on flexible mica substrate was also studied and demonstrated that its performance was almost not affected by the bending.

嘉宾简介：

杨晓霞，国家纳米科学中心，特聘研究员。2012年博士毕业于中科院物理所，随后加入国家纳米中心，历任助理研究员/副研究员/研究员。主要研究方向为纳米光子学材料和器件及其增强红外光谱应用，围绕新型二维纳米材料的极化波性质和器件设计展开研究。近年来，共发表文章30余篇，包括Nat Commun, Adv Mater, Adv Func Mater等。申请国内发明专利10余项，国际专利1项，授权6项。以负责人承担科研项目4项，包括自然科学基金面上项目、青年项目等。2017年入选中国科学院青年促进会成员。

代表工作：

1.Nature Communications, 2019, 10, 1131.

2.Nature Communications, 2016, 7: 12334.

3.Advanced Materials, 2018, 30, 1704896.

4.Advanced Materials, 2016, 28(15): 2931-2938.

5.Advanced Functional Materials, 2019, Accepted.

6.Advanced Science. 2018, 5, 1800175.