An investigation into dispersion upon switching between solvents within a microfluidic system using a chemically resistant integrated optical refractive index sensor
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 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.
377-385
Parker, Richard M.
b052ca4d-b6c7-4fdd-a2f9-45032f0ff13f
Gates, James C.
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Wales, D.
9a97bbec-ee63-48aa-8207-f06b8961c568
Smith, Peter G.R.
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Grossel, Martin C.
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January 2013
Parker, Richard M.
b052ca4d-b6c7-4fdd-a2f9-45032f0ff13f
Gates, James C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Wales, D.
9a97bbec-ee63-48aa-8207-f06b8961c568
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Grossel, Martin C.
403bf3ff-6364-44e9-ab46-52d84c6f0d56
Parker, Richard M., Gates, James C., Wales, D., Smith, Peter G.R. and Grossel, Martin C.
(2013)
An investigation into dispersion upon switching between solvents within a microfluidic system using a chemically resistant integrated optical refractive index sensor.
Lab on a Chip, 13 (3), .
(doi:10.1039/C2LC41124E).
Abstract
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.
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Published date: January 2013
Organisations:
Optoelectronics Research Centre, Chemistry, Electronics & Computer Science
Identifiers
Local EPrints ID: 347645
URI: http://eprints.soton.ac.uk/id/eprint/347645
ISSN: 1473-0197
PURE UUID: f43dec88-f4af-4693-8e9a-92a6a43086ea
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Date deposited: 30 Jan 2013 11:13
Last modified: 15 Mar 2024 03:07
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Author:
Richard M. Parker
Author:
D. Wales
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