Year: 2019
Type: article
Abstract: 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 μm2, 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 (<1 min) of our devices, which enables real-time monitoring of gaseous chemical reactions. The demonstration and understanding of gas molecule identification using graphene plasmonic nanostructures open the door to various emerging applications, including in-breath diagnostics and monitoring of volatile organic compounds.
Source: Nature Communications
Institutions: National Center for Nanoscience and Technology, University of Chinese Academy of Sciences, University of Minnesota, Institució Catalana de Recerca i Estudis Avançats, Institute of Photonic Sciences, Barcelona Institute of Science and Technology, Aalto University, Chinese Academy of Sciences
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $5,200
Funders: National Science Foundation, Fundación Cellex, Centres de Recerca de Catalunya, European Commission, National Natural Science Foundation of China, Chinese Academy of Sciences, Youth Innovation Promotion Association of the Chinese Academy of Sciences, Business Finland, Agència de Gestió d'Ajuts Universitaris i de Recerca, National Key Research and Development Program of China, Youth Innovation Promotion Association, Division of Emerging Frontiers in Research and Innovation
Awards: G2210503603, G2361008084, G2468274194, EFRI NewLAW: Mid-infrared topological plasmon-polaritons with 2D materials, G2885917519, 基于范德华异质结构的纳米光学杂化体系设计与模式调控研究, G434337789, Graphene Based Ultrafast Lasers, G5625996231, G5905771504, G5927393654, G6126039267, G6203667726, G6328780635, Scalable Two-Dimensional Quantum Integrated Photonics, G6609252793, G6899558724, G7424720503, International Desktop Grid Federation – Support Project, G8707856532, 碳基复合结构等离激元波导的构建与特性调控研究
OpenAlex ID: W2921583012