Micro Chemical Systems Limited

The University of Hull

Thomas McCreedy

Stephen John Haswell

Victoria Skelton

Paul David Ian Fletcher

Gillian Mary Greenway

Christine Jane Clive

Natalie Gayle Wilson

A micro-reactor is provided with a mixture of channels having larger cross-sectional areas (') and channels having smaller cross-sectional areas (&#x2032;). The smaller channels (&#x2032;) resist liquid movement driven by hydrostatic force but allow liquid movement driven by electro-osmotic force. Accordingly liquid flow is almost entirely driven by electro-osmotic force. The smaller channels (&#x2032;) are formed by etched grooves which are closed by a planar surface. This allows the cross-sectional areas of the smaller channels to be closely and reproducibly controlled.

Device having a liquid flowpath

A microchip device has at least one passage along which a liquid can be moved by applying a voltage to the liquid. The device includes a passage member ( ) in which the passage is formed and which has an aperture ( ). Additionally the device includes an electrode member ( ) that comprises an electrode ( ) and that is separably engageable with the passage member. The device includes a reservoir in fluid communication with the passages for holding a liquid. The electrode member cooperates with the aperture so that the electrode is in fluid communication with the passage without the electrode member obstructing the opening of the reservoir.

Device with passage for liquid

A method of controlling liquid movement in a chemical device comprising a porous structure involved applying an electrical potential to generate an electroosmotic force in the porous structure so as to propel a liquid through the porous structure. Also the porous structure is used to resist or prevent flow of a liquid through the porous structure in response to hydrostatic force.

Method for controlling liquid movement in a chemical device

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Hessle, United Kingdom

Thomas McCreedy