Mid-IR sensing platform for trace analysis in aqueous solutions based on a germanium-on-silicon waveguide chip with a mesoporous silica coating for analyte enrichment
- Author
- Nuria Teigell Beneitez (UGent) , Bettina Baumgartner, Jeroen Missinne (UGent) , Sanja Radosavljevic, Dominik Wacht, Stefan Hugger, Paweł Leszcz, Bernard Lendl and Günther Roelkens (UGent)
- Organization
- Abstract
- A novel platform based on evanescent wave sensing in the 6.5 to 7.5 mu m wavelength range is presented with the example of toluene detection in an aqueous solution. The overall sensing platform consists of a germanium-on-silicon waveguide with a functionalized mesoporous silica cladding and integrated microlenses for alignment-tolerant back-side optical interfacing with a tunable laser spectrometer. Hydrophobic functionalization of the mesoporous cladding allows enrichment of apolar analyte molecules and prevents strong interaction of water with the evanescent wave. The sensing performance was evaluated for aqueous toluene standards resulting in a limit of detection of 7 ppm. Recorded adsorption/desorption profiles followed Freundlich adsorption isotherms with rapid equilibration and resulting sensor response times of a few seconds. This indicates that continuous monitoring of contaminants in water is possible. A significant increase in LOD can be expected by likely improvements to the spectrometer noise floor which, expressed as a relative standard deviation of 100% lines, is currently in the range of 10(-2) A.U. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
- Keywords
- Atomic and Molecular Physics, and Optics, CHLORINATED HYDROCARBONS, GRATING COUPLERS, SI, SPECTROSCOPY, COCAINE
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-8673740
- MLA
- Teigell Beneitez, Nuria, et al. “Mid-IR Sensing Platform for Trace Analysis in Aqueous Solutions Based on a Germanium-on-Silicon Waveguide Chip with a Mesoporous Silica Coating for Analyte Enrichment.” OPTICS EXPRESS, vol. 28, no. 18, 2020, pp. 27013–27, doi:10.1364/oe.399646.
- APA
- Teigell Beneitez, N., Baumgartner, B., Missinne, J., Radosavljevic, S., Wacht, D., Hugger, S., … Roelkens, G. (2020). Mid-IR sensing platform for trace analysis in aqueous solutions based on a germanium-on-silicon waveguide chip with a mesoporous silica coating for analyte enrichment. OPTICS EXPRESS, 28(18), 27013–27027. https://doi.org/10.1364/oe.399646
- Chicago author-date
- Teigell Beneitez, Nuria, Bettina Baumgartner, Jeroen Missinne, Sanja Radosavljevic, Dominik Wacht, Stefan Hugger, Paweł Leszcz, Bernard Lendl, and Günther Roelkens. 2020. “Mid-IR Sensing Platform for Trace Analysis in Aqueous Solutions Based on a Germanium-on-Silicon Waveguide Chip with a Mesoporous Silica Coating for Analyte Enrichment.” OPTICS EXPRESS 28 (18): 27013–27. https://doi.org/10.1364/oe.399646.
- Chicago author-date (all authors)
- Teigell Beneitez, Nuria, Bettina Baumgartner, Jeroen Missinne, Sanja Radosavljevic, Dominik Wacht, Stefan Hugger, Paweł Leszcz, Bernard Lendl, and Günther Roelkens. 2020. “Mid-IR Sensing Platform for Trace Analysis in Aqueous Solutions Based on a Germanium-on-Silicon Waveguide Chip with a Mesoporous Silica Coating for Analyte Enrichment.” OPTICS EXPRESS 28 (18): 27013–27027. doi:10.1364/oe.399646.
- Vancouver
- 1.Teigell Beneitez N, Baumgartner B, Missinne J, Radosavljevic S, Wacht D, Hugger S, et al. Mid-IR sensing platform for trace analysis in aqueous solutions based on a germanium-on-silicon waveguide chip with a mesoporous silica coating for analyte enrichment. OPTICS EXPRESS. 2020;28(18):27013–27.
- IEEE
- [1]N. Teigell Beneitez et al., “Mid-IR sensing platform for trace analysis in aqueous solutions based on a germanium-on-silicon waveguide chip with a mesoporous silica coating for analyte enrichment,” OPTICS EXPRESS, vol. 28, no. 18, pp. 27013–27027, 2020.
@article{8673740,
abstract = {{A novel platform based on evanescent wave sensing in the 6.5 to 7.5 mu m wavelength range is presented with the example of toluene detection in an aqueous solution. The overall sensing platform consists of a germanium-on-silicon waveguide with a functionalized mesoporous silica cladding and integrated microlenses for alignment-tolerant back-side optical interfacing with a tunable laser spectrometer. Hydrophobic functionalization of the mesoporous cladding allows enrichment of apolar analyte molecules and prevents strong interaction of water with the evanescent wave. The sensing performance was evaluated for aqueous toluene standards resulting in a limit of detection of 7 ppm. Recorded adsorption/desorption profiles followed Freundlich adsorption isotherms with rapid equilibration and resulting sensor response times of a few seconds. This indicates that continuous monitoring of contaminants in water is possible. A significant increase in LOD can be expected by likely improvements to the spectrometer noise floor which, expressed as a relative standard deviation of 100% lines, is currently in the range of 10(-2) A.U. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement}},
author = {{Teigell Beneitez, Nuria and Baumgartner, Bettina and Missinne, Jeroen and Radosavljevic, Sanja and Wacht, Dominik and Hugger, Stefan and Leszcz, Paweł and Lendl, Bernard and Roelkens, Günther}},
issn = {{1094-4087}},
journal = {{OPTICS EXPRESS}},
keywords = {{Atomic and Molecular Physics,and Optics,CHLORINATED HYDROCARBONS,GRATING COUPLERS,SI,SPECTROSCOPY,COCAINE}},
language = {{eng}},
number = {{18}},
pages = {{27013--27027}},
title = {{Mid-IR sensing platform for trace analysis in aqueous solutions based on a germanium-on-silicon waveguide chip with a mesoporous silica coating for analyte enrichment}},
url = {{http://doi.org/10.1364/oe.399646}},
volume = {{28}},
year = {{2020}},
}
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