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- Aparicio, Francisco, et al.
(författare)
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Incorporation of luminescent nanometric films in photonic crystals and devices for the development of photonic sensors
- 2010
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Konferensbidrag (refereegranskat)abstract
- Dye molecules embedded in different matrices in the form of thin films are the basis of specific materials used for laser cavities, optical filters, optical gas sensors, etc. In the present communication we discuss a new methodology based on the remote microwave plasma assisted deposition of dye containing thin films that circumvent the above mentioned problems. It permits a tailored synthesis of optically active nanometric thin films containing dye molecules which are active as fluorescence emitters (i.e., coloured and fluorescent films). The principle of this new procedure is the partial polymerization of dye molecules that are evaporated over a substrate while exposed to a remote microwave Ar plasma. As a result of this process a polymeric thin film is produced in one step where some dye molecules keep intact their optical activity (although eventually, their optical response can be slightly modified by matrix effects). This methodology has been recently used for the deposition of novel plasma nanocomposites containing non-aggregated laser dyes to maximize the fluorescent emission of the materials and for the fabrication of optical NO2 sensing nanocomposites. To illustrate the possibilities of the technique we present here results for different fluorescent dye molecules, as perylene dyes, and several xanthene and oxazine derivative cationic dyes which are typically used as gain media in tuneable laser dyes. The luminescent, optical and sensing properties of these dye containing nanocomposites will be presented. These active optical layers are being developed for the fabrication of photonic sensor devices, optical filters and photonic chips (PHODYE EU Project). This is due to the full compatibility of the synthetic methodology with the present integrated microelectronic and optoelectronic technology. The possibilities for the fabrication of photonic devices integrating these active optical layers will be demonstrated. Especial attention will be paid to recent results about the incorporation of the luminescent films in photonic crystals and about the conformal growth of luminescent planar defects within artificial opals.
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| 2. |
- Aparicio, Francisco J., et al.
(författare)
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Transparent Nanometric Organic Luminescent Films as UV-Active Components in Photonic Structures
- 2011
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Ingår i: Advanced Materials. - : Wiley. - 0935-9648 .- 1521-4095. ; 23:6, s. 761-765
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Tidskriftsartikel (refereegranskat)abstract
- A new kind of visible-blind organic thin-film material, consisting of a polymeric matrix with a high concentration of embedded 3-hydroxyflavone (3HF) dye molecules, that absorbs UV light and emits green light is presented. The thin films can be grown on sensitive substrates, including flexible polymers and paper. Their suitability as photonic active components in photonic devices is demonstrated.
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| 3. |
- Giannone, Domenico, et al.
(författare)
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High Performance Multichannel Photonic Biochip Sensors for Future Point of Care Diagnostics : an Overview on Two EU-Sponsored Projects
- 2010
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Ingår i: SPIE Proc. 7715 BIOPHOTONICS - PHOTONIC SOLUTIONS FOR BETTER HEALTH CARE II. - : SPIE. - 9780819481887 ; , s. 77150U-1-77150U-12
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Konferensbidrag (refereegranskat)abstract
- We present here research work on two optical biosensors which have been developed within two separate European projects (6(th) and 7(th) EU Framework Programmes). The biosensors are based on the idea of a disposable biochip, integrating photonics and microfluidics, optically interrogated by a multichannel interrogation platform. The objective is to develop versatile tools, suitable for performing screening tests at Point of Care or for example, at schools or in the field. The two projects explore different options in terms of optical design and different materials. While SABIO used Si(3)N(4)/SiO(2) ring resonators structures, P3SENS aims at the use of photonic crystal devices based on polymers, potentially a much more economical option. We discuss both approaches to show how they enable high sensitivity and multiple channel detection. The medium term objective is to develop a new detection system that has low cost and is portable but at the same time offering high sensitivity, selectivity and multiparametric detection from a sample containing various components (e. g. blood, serum, saliva, etc.). Most biological sensing devices already present on the market suffer from limitations in multichannel operation capability (either the detection of multiple analytes indicating a given pathology or the simultaneous detection of multiple pathologies). In other words, the number of different analytes that can be detected on a single chip is very limited. This limitation is a main issue addressed by the two projects. The excessive cost per test of conventional bio sensing devices is a second issue that is addressed.
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| 6. |
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| 7. |
- Sohlström, Hans, 1952-
(författare)
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Highly sensitive lab-on-chip for rapid diagnosis
- 2010
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Ingår i: SPIE Newsroom. - : SPIE. - 1818-2259.
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Annan publikation (populärvet., debatt m.m.)abstract
- Accurate extraction of optical signals and multiple sensors on a single optical chip enable low-cost detection of specific proteins at the doctor's desk.
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