Microfluidic design rules for capillary slot-based electrospray sources

Martin Brinkmann; R Blossey; S Arscott; C Druon; P Tabourier; S Le Gac; C Rolando

doi:10.1063/1.1792381

Microfluidic design rules for capillary slot-based electrospray sources

Martin Brinkmann, R Blossey, S Arscott, C Druon, P Tabourier, S Le Gac, C Rolando

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

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Abstract

We formulate microfluidic design principles for electrospray ionization sources based on a rectangular capillary slot formed by two triangular cantilevers. Spontaneous imbibition of the test liquids into the slot by capillary action provides a robust mechanism for liquid transport from a reservoir to the cantilever tip where an electrospray is generated upon application of a voltage. The correct functioning of the source requires the liquid bridging the slot to have a negative Laplace pressure. Imbibition is controlled by the ratio of slot width to height w∕h and the intrinsic contact angles θw, θs of the liquid with the slot walls and the cantilever faces, respectively. Based on these parameters we derive a simple criterion for the complete filling of the slot.

Original language	English
Pages (from-to)	2140-2142
Journal	Applied Physics Letters
Volume	85
Issue number	11
DOIs	https://doi.org/10.1063/1.1792381
Publication status	Published - 13 Sept 2004
Externally published	Yes

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title = "Microfluidic design rules for capillary slot-based electrospray sources",

abstract = "We formulate microfluidic design principles for electrospray ionization sources based on a rectangular capillary slot formed by two triangular cantilevers. Spontaneous imbibition of the test liquids into the slot by capillary action provides a robust mechanism for liquid transport from a reservoir to the cantilever tip where an electrospray is generated upon application of a voltage. The correct functioning of the source requires the liquid bridging the slot to have a negative Laplace pressure. Imbibition is controlled by the ratio of slot width to height w∕h and the intrinsic contact angles θw, θs of the liquid with the slot walls and the cantilever faces, respectively. Based on these parameters we derive a simple criterion for the complete filling of the slot.",

author = "Martin Brinkmann and R Blossey and S Arscott and C Druon and P Tabourier and \{Le Gac\}, S and C Rolando",

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AU - Brinkmann, Martin

AU - Blossey, R

AU - Arscott, S

AU - Druon, C

AU - Tabourier, P

AU - Le Gac, S

AU - Rolando, C

PY - 2004/9/13

Y1 - 2004/9/13

N2 - We formulate microfluidic design principles for electrospray ionization sources based on a rectangular capillary slot formed by two triangular cantilevers. Spontaneous imbibition of the test liquids into the slot by capillary action provides a robust mechanism for liquid transport from a reservoir to the cantilever tip where an electrospray is generated upon application of a voltage. The correct functioning of the source requires the liquid bridging the slot to have a negative Laplace pressure. Imbibition is controlled by the ratio of slot width to height w∕h and the intrinsic contact angles θw, θs of the liquid with the slot walls and the cantilever faces, respectively. Based on these parameters we derive a simple criterion for the complete filling of the slot.

AB - We formulate microfluidic design principles for electrospray ionization sources based on a rectangular capillary slot formed by two triangular cantilevers. Spontaneous imbibition of the test liquids into the slot by capillary action provides a robust mechanism for liquid transport from a reservoir to the cantilever tip where an electrospray is generated upon application of a voltage. The correct functioning of the source requires the liquid bridging the slot to have a negative Laplace pressure. Imbibition is controlled by the ratio of slot width to height w∕h and the intrinsic contact angles θw, θs of the liquid with the slot walls and the cantilever faces, respectively. Based on these parameters we derive a simple criterion for the complete filling of the slot.

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VL - 85

SP - 2140

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 11

ER -

Microfluidic design rules for capillary slot-based electrospray sources

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