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Issue 22, 2014
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Roll up polymer/oxide/polymer nanomembranes as a hybrid optical microcavity for humidity sensing

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Abstract

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.

Graphical abstract: Roll up polymer/oxide/polymer nanomembranes as a hybrid optical microcavity for humidity sensing

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Publication details

The article was received on 22 Jun 2014, accepted on 07 Sep 2014 and first published on 10 Sep 2014


Article type: Paper
DOI: 10.1039/C4NR03473B
Nanoscale, 2014,6, 13646-13650

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

    J. Zhang, J. Zhong, Y. F. Fang, J. Wang, G. S. Huang, X. G. Cui and Y. F. Mei, Nanoscale, 2014, 6, 13646
    DOI: 10.1039/C4NR03473B

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