Direct-Dispense Polymeric Waveguides Platform for Optical Chemical Sensors
We describe an automated robotic technique called direct-dispense to fabricate a polymeric platform that supports optical sensor arrays. Direct-dispense, which is a type of the emerging direct-write microfabrication techniques, uses fugitive organic inks in combination with cross-linkable polymers t...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2008-12-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1424-8220/8/12/7636/ |
| _version_ | 1818014577136238592 |
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| author | Mohamad Hajj-Hassan Timothy Gonzalez Ebrahim Ghafar-Zadeh Hagop Djeghelian Vamsy Chodavarapu Daniel Therriault Mark Andrews |
| author_facet | Mohamad Hajj-Hassan Timothy Gonzalez Ebrahim Ghafar-Zadeh Hagop Djeghelian Vamsy Chodavarapu Daniel Therriault Mark Andrews |
| author_sort | Mohamad Hajj-Hassan |
| collection | DOAJ |
| description | We describe an automated robotic technique called direct-dispense to fabricate a polymeric platform that supports optical sensor arrays. Direct-dispense, which is a type of the emerging direct-write microfabrication techniques, uses fugitive organic inks in combination with cross-linkable polymers to create microfluidic channels and other microstructures. Specifically, we describe an application of direct-dispensing to develop optical biochemical sensors by fabricating planar ridge waveguides that support sol-gelderived xerogel-based thin films. The xerogel-based sensor materials act as host media to house luminophore biochemical recognition elements. As a prototype implementation, we demonstrate gaseous oxygen (O2) responsive optical sensors that operate on the basis of monitoring luminescence intensity signals. The optical sensor employs a Light Emitting Diode (LED) excitation source and a standard silicon photodiode as the detector. The sensor operates over the full scale (0%-100%) of O2 concentrations with a response time of less than 1 second. This work has implications for the development of miniaturized multisensor platforms that can be cost-effectively and reliably mass-produced. |
| first_indexed | 2024-04-14T06:47:14Z |
| format | Article |
| id | doaj.art-0bb00841a01e4ea29d10f5806ceba154 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-14T06:47:14Z |
| publishDate | 2008-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-0bb00841a01e4ea29d10f5806ceba1542022-12-22T02:07:08ZengMDPI AGSensors1424-82202008-12-018127636764810.3390/s8127636Direct-Dispense Polymeric Waveguides Platform for Optical Chemical SensorsMohamad Hajj-HassanTimothy GonzalezEbrahim Ghafar-ZadehHagop DjeghelianVamsy ChodavarapuDaniel TherriaultMark AndrewsWe describe an automated robotic technique called direct-dispense to fabricate a polymeric platform that supports optical sensor arrays. Direct-dispense, which is a type of the emerging direct-write microfabrication techniques, uses fugitive organic inks in combination with cross-linkable polymers to create microfluidic channels and other microstructures. Specifically, we describe an application of direct-dispensing to develop optical biochemical sensors by fabricating planar ridge waveguides that support sol-gelderived xerogel-based thin films. The xerogel-based sensor materials act as host media to house luminophore biochemical recognition elements. As a prototype implementation, we demonstrate gaseous oxygen (O2) responsive optical sensors that operate on the basis of monitoring luminescence intensity signals. The optical sensor employs a Light Emitting Diode (LED) excitation source and a standard silicon photodiode as the detector. The sensor operates over the full scale (0%-100%) of O2 concentrations with a response time of less than 1 second. This work has implications for the development of miniaturized multisensor platforms that can be cost-effectively and reliably mass-produced.http://www.mdpi.com/1424-8220/8/12/7636/Direct-DispenseDirect-WriteXerogelsOxygen SensorsWaveguidesOptical SensorsFluorescenceChemical SensorsPolymer Waveguides |
| spellingShingle | Mohamad Hajj-Hassan Timothy Gonzalez Ebrahim Ghafar-Zadeh Hagop Djeghelian Vamsy Chodavarapu Daniel Therriault Mark Andrews Direct-Dispense Polymeric Waveguides Platform for Optical Chemical Sensors Sensors Direct-Dispense Direct-Write Xerogels Oxygen Sensors Waveguides Optical Sensors Fluorescence Chemical Sensors Polymer Waveguides |
| title | Direct-Dispense Polymeric Waveguides Platform for Optical Chemical Sensors |
| title_full | Direct-Dispense Polymeric Waveguides Platform for Optical Chemical Sensors |
| title_fullStr | Direct-Dispense Polymeric Waveguides Platform for Optical Chemical Sensors |
| title_full_unstemmed | Direct-Dispense Polymeric Waveguides Platform for Optical Chemical Sensors |
| title_short | Direct-Dispense Polymeric Waveguides Platform for Optical Chemical Sensors |
| title_sort | direct dispense polymeric waveguides platform for optical chemical sensors |
| topic | Direct-Dispense Direct-Write Xerogels Oxygen Sensors Waveguides Optical Sensors Fluorescence Chemical Sensors Polymer Waveguides |
| url | http://www.mdpi.com/1424-8220/8/12/7636/ |
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