An investigation into dispersion upon switching between solvents within a microfluidic system using a chemically resistant integrated optical refractive index sensor
A planar Bragg grating device has been developed that is capable of detecting changes in the refractive index of a wide range of fluids including solvents, acids and bases. The integration of this high precision refractive index sensor within a chemically resistant microfluidic flow system has enabl...
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| Veröffentlicht in: | Lab on a chip 2013-02, Vol.13 (3), p.377-385 |
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| container_title | Lab on a chip |
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| creator | Parker, Richard M Gates, James C Wales, Dominic J Smith, Peter G R Grossel, Martin C |
| description | A planar Bragg grating device has been developed that is capable of detecting changes in the refractive index of a wide range of fluids including solvents, acids and bases. The integration of this high precision refractive index sensor within a chemically resistant microfluidic flow system has enabled the investigation of diverse fluid interactions. By cycling between different solvents, both miscible and immiscible, within the microfluidic system it is shown that the previous solvent determines the nature of the refractive index profile across the transition in composition. This solvent dispersion effect is investigated with particular attention to the methanol-water transition, where transients in refractive index are observed that are an order of magnitude larger in amplitude than the difference between the bulk fluids. The potential complications of such phenomenon are discussed together with an example of a device that exploits this effect for the unambiguous composition measurement of a binary solvent system. |
| doi_str_mv | 10.1039/c2lc41124e |
| format | Article |
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| fulltext | fulltext |
| identifier | ISSN: 1473-0197 |
| ispartof | Lab on a chip, 2013-02, Vol.13 (3), p.377-385 |
| issn | 1473-0197 1473-0189 |
| language | eng |
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| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Dispersions Fluid dynamics Fluid flow Fluids Microfluidics Refractive index Refractivity Solvents |
| title | An investigation into dispersion upon switching between solvents within a microfluidic system using a chemically resistant integrated optical refractive index sensor |
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