Cargando…
Time-Resolved Spectroscopy of Ethanol Evaporation on Free-Standing Porous Silicon Photonic Microcavities
In this work, we have followed ethanol evaporation at two different concentrations using a fiber optic spectrometer and a screen capture application with a resolving capacity of 10 ms. The transmission spectra are measured in the visible-near-infrared range with a resolution of 0.5 nm. Porous Silico...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6025103/ https://www.ncbi.nlm.nih.gov/pubmed/29861442 http://dx.doi.org/10.3390/ma11060894 |
_version_ | 1783336207237775360 |
---|---|
author | Jiménez Vivanco, María del Rayo García, Godofredo Doti, Rafael Faubert, Jocelyn Lugo Arce, Jesus Eduardo |
author_facet | Jiménez Vivanco, María del Rayo García, Godofredo Doti, Rafael Faubert, Jocelyn Lugo Arce, Jesus Eduardo |
author_sort | Jiménez Vivanco, María del Rayo |
collection | PubMed |
description | In this work, we have followed ethanol evaporation at two different concentrations using a fiber optic spectrometer and a screen capture application with a resolving capacity of 10 ms. The transmission spectra are measured in the visible-near-infrared range with a resolution of 0.5 nm. Porous Silicon microcavities were fabricated by electrochemistry etching of crystalline silicon. The microcavities were designed to have a localized mode at 472 nm (blue band). Ethanol infiltration produces a redshift of approximately 17 nm. After a few minutes, a phase change from liquid to vapor occurs and the localized wavelength shifts back to the blue band. This process happens in a time window of only 60 ms. Our results indicate a difference between two distinct ethanol concentrations (70% and 35%). For the lower ethanol concentration, the blue shift rate process is slower in the first 30 ms and then it equals the high ethanol concentration blue shift rate. We have repeated the same process, but in an extended mode (750 nm), and have obtained similar results. Our results show that these photonic structures and with the spectroscopic technique used here can be implemented as a sensor with sufficient sensitivity and selectivity. Finally, since the photonic structure is a membrane, it can also be used as a transducer. For instance, by placing this photonic structure on top of a fast photodetector whose photo-response lies within the same bandwidth, the optical response can be transferred to an electrical signal. |
format | Online Article Text |
id | pubmed-6025103 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-60251032018-07-09 Time-Resolved Spectroscopy of Ethanol Evaporation on Free-Standing Porous Silicon Photonic Microcavities Jiménez Vivanco, María del Rayo García, Godofredo Doti, Rafael Faubert, Jocelyn Lugo Arce, Jesus Eduardo Materials (Basel) Article In this work, we have followed ethanol evaporation at two different concentrations using a fiber optic spectrometer and a screen capture application with a resolving capacity of 10 ms. The transmission spectra are measured in the visible-near-infrared range with a resolution of 0.5 nm. Porous Silicon microcavities were fabricated by electrochemistry etching of crystalline silicon. The microcavities were designed to have a localized mode at 472 nm (blue band). Ethanol infiltration produces a redshift of approximately 17 nm. After a few minutes, a phase change from liquid to vapor occurs and the localized wavelength shifts back to the blue band. This process happens in a time window of only 60 ms. Our results indicate a difference between two distinct ethanol concentrations (70% and 35%). For the lower ethanol concentration, the blue shift rate process is slower in the first 30 ms and then it equals the high ethanol concentration blue shift rate. We have repeated the same process, but in an extended mode (750 nm), and have obtained similar results. Our results show that these photonic structures and with the spectroscopic technique used here can be implemented as a sensor with sufficient sensitivity and selectivity. Finally, since the photonic structure is a membrane, it can also be used as a transducer. For instance, by placing this photonic structure on top of a fast photodetector whose photo-response lies within the same bandwidth, the optical response can be transferred to an electrical signal. MDPI 2018-05-26 /pmc/articles/PMC6025103/ /pubmed/29861442 http://dx.doi.org/10.3390/ma11060894 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Jiménez Vivanco, María del Rayo García, Godofredo Doti, Rafael Faubert, Jocelyn Lugo Arce, Jesus Eduardo Time-Resolved Spectroscopy of Ethanol Evaporation on Free-Standing Porous Silicon Photonic Microcavities |
title | Time-Resolved Spectroscopy of Ethanol Evaporation on Free-Standing Porous Silicon Photonic Microcavities |
title_full | Time-Resolved Spectroscopy of Ethanol Evaporation on Free-Standing Porous Silicon Photonic Microcavities |
title_fullStr | Time-Resolved Spectroscopy of Ethanol Evaporation on Free-Standing Porous Silicon Photonic Microcavities |
title_full_unstemmed | Time-Resolved Spectroscopy of Ethanol Evaporation on Free-Standing Porous Silicon Photonic Microcavities |
title_short | Time-Resolved Spectroscopy of Ethanol Evaporation on Free-Standing Porous Silicon Photonic Microcavities |
title_sort | time-resolved spectroscopy of ethanol evaporation on free-standing porous silicon photonic microcavities |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6025103/ https://www.ncbi.nlm.nih.gov/pubmed/29861442 http://dx.doi.org/10.3390/ma11060894 |
work_keys_str_mv | AT jimenezvivancomariadelrayo timeresolvedspectroscopyofethanolevaporationonfreestandingporoussiliconphotonicmicrocavities AT garciagodofredo timeresolvedspectroscopyofethanolevaporationonfreestandingporoussiliconphotonicmicrocavities AT dotirafael timeresolvedspectroscopyofethanolevaporationonfreestandingporoussiliconphotonicmicrocavities AT faubertjocelyn timeresolvedspectroscopyofethanolevaporationonfreestandingporoussiliconphotonicmicrocavities AT lugoarcejesuseduardo timeresolvedspectroscopyofethanolevaporationonfreestandingporoussiliconphotonicmicrocavities |