Roll up polymer/oxide/polymer nanomembranes as a hybrid optical microcavity for humidity sensing.

Zhang, J; Zhong, J; Fang, Y F; Wang, J; Huang, G S; Cui, X G; Mei, Y F

Zhang, J; Zhong, J; Fang, Y F; Wang, J; Huang, G S; Cui, X G; Mei, Y F.

Afiliación

Zhang J; Department of Light Sources and Illuminating Engineering, Engineering Research Center of Advanced Lighting Technology, Ministry of Education, School of Information Science & Technology, Fudan University, Shanghai 200433, People's Republic of China. cuixugao@fudan.edu.cn.

Nanoscale ; 6(22): 13646-50, 2014 Nov 21.

Article en En | MEDLINE | ID: mdl-25273592

RESUMEN

A hybrid optical microcavity from rolled-up polymer/oxide/polymer nanomembranes presents its excellent capability for environmental relative humidity detection. When exposed to a moist surrounding, poly(acrylic acid)/poly(ethylenimine) polymers swell greatly due to the absorption of water molecules, which thus leads to an increased wall thickness of the tubular optical microcavity and therefore presents a profound wavelength redshift of its whispering-gallery mode resonance. These experiments fit well with the calculation based on the Mie-scattering theory. Theoretical calculation also demonstrates that the thin walls of our tubular microcavities contribute to a high detection sensitivity compared to other microcavities. Our work could lead to new designs and applications of optical microcavities.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nanoscale Año: 2014 Tipo del documento: Article Pais de publicación: Reino Unido

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