Gas identification with graphene plasmons

Hai Hu, Xiaoxia Yang, Xiangdong Guo, Kaveh Khaliji, Sudipta Romen Biswas, F. Javier García de Abajo, Tony Low, Zhipei Sun, Qing Dai*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

130 Citations (Scopus)
217 Downloads (Pure)


Identification of gas molecules plays a key role a wide range of applications extending from healthcare to security. However, the most widely used gas nano-sensors are based on electrical approaches or refractive index sensing, which typically are unable to identify molecular species. Here, we report label-free identification of gas molecules SO2, NO2, N2O, and NO by detecting their rotational-vibrational modes using graphene plasmon. The detected signal corresponds to a gas molecule layer adsorbed on the graphene surface with a concentration of 800 zeptomole per mu m(2), which is made possible by the strong field confinement of graphene plasmons and high physisorption of gas molecules on the graphene nanoribbons. We further demonstrate a fast response time (

Original languageEnglish
Article number1131
Number of pages7
JournalNature Communications
Issue number1
Publication statusPublished - 8 Mar 2019
MoE publication typeA1 Journal article-refereed


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