Swelling of polydimethylsiloxane in toluene solutions on electromagnetic resonance of metamaterials

Wei Fan Chiang, Harry Miyosi Silalahi, Yuan Ming Liu, Yan Shou Lin, Tsung Hao Chang, Chia Rong Lee, Chia Yi Huang

研究成果: Article

摘要

A simple method for detecting organic solutions with a similar refractive index using metamaterials that are deposited on polydimethylsiloxane (PDMS) films is proposed. Pure toluene is diluted with pure alcohol for making up toluene solutions with concentrations of 0.5 wt. % and 1.0 wt. %. The experimental results from terahertz time-domain spectroscopy depict that pure alcohol and the toluene solutions have a similar refractive index in the terahertz region. The spectra of the metamaterials that are exposed to the toluene solutions are redshifted from that of the metamaterial that is exposed to pure alcohol, and the resonance frequencies of the metamaterials decrease with the increase in the concentrations of the toluene solutions. This result arises from the fact that the swelling of the PDMS films in the toluene solutions extends the arms of the split ring resonators, changing the dimensions of the metamaterials. The minimum detectable concentration of the metamaterials is less than 0.5 wt. % when they are exposed to the toluene solutions. The metamaterials deposited on the PDMS films can detect the organic solutions with a similar refractive index, and so they have the potential to sense organic gases with low concentrations.

原文English
文章編號211901
期刊Applied Physics Letters
115
發行號21
DOIs
出版狀態Published - 2019 十一月 18

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

指紋 深入研究「Swelling of polydimethylsiloxane in toluene solutions on electromagnetic resonance of metamaterials」主題。共同形成了獨特的指紋。

  • 引用此

    Chiang, W. F., Silalahi, H. M., Liu, Y. M., Lin, Y. S., Chang, T. H., Lee, C. R., & Huang, C. Y. (2019). Swelling of polydimethylsiloxane in toluene solutions on electromagnetic resonance of metamaterials. Applied Physics Letters, 115(21), [211901]. https://doi.org/10.1063/1.5123538