Optical chemical sensor based on multilayer self-assembled thin film sensors for aquaculture process control
First Claim
1. An optical chemical probe comprising at least one dye for detecting the presence of chemical analytes, and polymeric film media for binding the at least one dye, wherein the polymeric film media is comprised of consecutive layers of anionic and cationic polyelectrolytes.
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Abstract
Optical chemical probes have layers of anionic and cationic polyelectrolytes and one or more dyes incorporated into these layers. The probes are placed into the medium and the dye or dyes react in the presence of the corresponding chemical. Color changes may be observed manually or by a photo detector. A light source may be employed to increase the optical signal received from the probe. Further, a waveguide may be used to trap multiple optical signals. The invention is used for chemical analysis.
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24 Claims
- 1. An optical chemical probe comprising at least one dye for detecting the presence of chemical analytes, and polymeric film media for binding the at least one dye, wherein the polymeric film media is comprised of consecutive layers of anionic and cationic polyelectrolytes.
- 8. A chemical sensor apparatus comprising at least one dye for detecting the presence of chemical analytes, polymeric film media for binding the at least one dye, a light source for generating optical signals corresponding to changes in the optical absorption spectrum and fluorescence of the dye, and a detector positioned near the polymeric film media for sensing the optical signals, wherein the polymeric film media is comprised of consecutive layers of anionic and cationic polyelectrolytes.
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20. A chemical sensor apparatus comprising an optical waveguide, at least one dye for detecting the presence of chemical analytes;
- polymeric film media positioned on the waveguide for binding the at least one dye, a light source for generating optical signals corresponding to changes in the optical absorption spectrum of the dye, and a detector positioned near the waveguide for sensing the optical signals, wherein the waveguide has at least two regions of differing polymeric media with different dyes bound to the polymeric media and wherein the polymeric film media is comprised of consecutive layers of anionic and cationic polyelectrolytes.
- View Dependent Claims (21)
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22. A method for identifying concentration of a chemical analyte comprising incorporating at least one dye in consecutive layers of anionic and cationic polyelectrolytes;
- placing the layers and dyes into the media to be analyzed; and
detecting changes in the optical absorption of the layers and dyes. - View Dependent Claims (23)
- placing the layers and dyes into the media to be analyzed; and
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24. A method for identifying concentration of a chemical analyte in either gaseous or liquid phase comprising incorporating at least one dye in consecutive layers of anionic and cationic polyelectrolytes;
- placing the layers and dyes into the media to be analyzed;
using a light source to create optical signals corresponding to changes in the optical absorption spectrum;
trapping the optical signals;
detecting the optical signals;
collecting the optical signals; and
converting the optical signals to electronic signals.
- placing the layers and dyes into the media to be analyzed;
Specification